Class ZedGraphControl

The ZedGraphControl class provides a UserControl interface to the ZedGraph class library. This allows ZedGraph to be installed as a control in the Visual Studio toolbox. You can use the control by simply dragging it onto a form in the Visual Studio form editor. All graph attributes are accessible via the GraphPane property.

Inheritance
Object
MarshalByRefObject
Component
Control
ScrollableControl
ContainerControl
UserControl
ZedGraphControl
Inherited Members
Namespace: ZedGraph
Assembly: ZedGraph.WinForms.dll
Syntax
public class ZedGraphControl : UserControl, ISynchronizeInvoke, IBindableComponent, IComponent, IDisposable, IDropTarget, IWin32Window, IContainerControl

Constructors

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ZedGraphControl()

Default Constructor

Declaration
public ZedGraphControl()

Properties

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BeenDisposed

This checks if the control has been disposed. This is synonymous with the graph pane having been nulled or disposed. Therefore this is the same as ZedGraphControl.GraphPane == null.

Declaration
[Bindable(false)]
[Browsable(false)]
public bool BeenDisposed { get; }
Property Value
Type Description
Boolean
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EditButtons

Gets or sets a value that determines which Mouse button will be used to edit point data values

Declaration
[Bindable(true)]
public MouseButtons EditButtons { get; set; }
Property Value
Type Description
MouseButtons
Remarks

This setting only applies if IsEnableHEdit and/or IsEnableVEdit are true.

See Also
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EditModifierKeys

Gets or sets a value that determines which modifier keys will be used to edit point data values

Declaration
[Bindable(true)]
public Keys EditModifierKeys { get; set; }
Property Value
Type Description
Keys
Remarks

This setting only applies if IsEnableHEdit and/or IsEnableVEdit are true.

See Also
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GraphPane

Gets or sets the GraphPane property for the control

Declaration
[Bindable(false)]
[Browsable(false)]
public GraphPane GraphPane { get; set; }
Property Value
Type Description
GraphPane
Remarks

ZedGraphControl actually uses a MasterPane object to hold a list of GraphPane objects. This property really only accesses the first GraphPane in the list. If there is more than one GraphPane, use the MasterPane indexer property to access any of the GraphPane objects.

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IsAntiAlias

Gets or sets a value that determines if all drawing operations for this control will be forced to operate in Anti-alias mode. Note that if this value is set to "true", it overrides the setting for sub-objects. Otherwise, the sub-object settings (such as IsAntiAlias) will be honored.

Declaration
[Bindable(true)]
public bool IsAntiAlias { get; set; }
Property Value
Type Description
Boolean
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IsAutoScrollRange

Gets or sets a value that controls whether or not the axis value range for the scroll bars will be set automatically.

Declaration
[Bindable(true)]
public bool IsAutoScrollRange { get; set; }
Property Value
Type Description
Boolean
Remarks

If this value is set to true, then the range of the scroll bars will be set automatically to the actual range of the data as returned by GetRange(Boolean, Boolean, GraphPane) at the time that AxisChange() was last called. Note that a value of true can override any setting of ScrollMinX, ScrollMaxX, ScrollMinY, ScrollMaxY, ScrollMinY2, and ScrollMaxY2. Note also that you must call AxisChange() from the ZedGraphControl for this to work properly (e.g., don't call it directly from the GraphPane. Alternatively, you can call SetScrollRangeFromData() at anytime to set the scroll bar range.
In most cases, you will probably want to disable IsBoundedRanges before activating this option.

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IsEnableHEdit

Gets or sets a value that determines whether or not editing of point data is allowed in the horizontal direction.

Declaration
[Bindable(true)]
public bool IsEnableHEdit { get; set; }
Property Value
Type Description
Boolean
Remarks

Editing is done by holding down the Alt key, and left-clicking on an individual point of a given CurveItem to drag it to a new location. The Mouse and Key combination for this mode are modifiable using EditButtons and EditModifierKeys.

See Also
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IsEnableHPan

Gets or sets a value that determines whether or not panning is allowed for the control in the horizontal direction.

Declaration
[Bindable(true)]
public bool IsEnableHPan { get; set; }
Property Value
Type Description
Boolean
Remarks

Panning is done by clicking the middle mouse button (or holding down the shift key while clicking the left mouse button) inside the Rect and dragging the mouse around to shift the scale ranges as desired.

See Also
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IsEnableHZoom

Gets or sets a value that determines whether or not zooming is allowed for the control in the horizontal direction.

Declaration
[Bindable(true)]
public bool IsEnableHZoom { get; set; }
Property Value
Type Description
Boolean
Remarks

Zooming is done by left-clicking inside the Rect to drag out a rectangle, indicating the new scale ranges that will be part of the graph.

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IsEnableSelection

Gets or sets a value that determines whether or not selection is allowed for the control.

Declaration
[Bindable(true)]
public bool IsEnableSelection { get; set; }
Property Value
Type Description
Boolean
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IsEnableVEdit

Gets or sets a value that determines whether or not editing of point data is allowed in the vertical direction.

Declaration
[Bindable(true)]
public bool IsEnableVEdit { get; set; }
Property Value
Type Description
Boolean
Remarks

Editing is done by holding down the Alt key, and left-clicking on an individual point of a given CurveItem to drag it to a new location. The Mouse and Key combination for this mode are modifiable using EditButtons and EditModifierKeys.

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IsEnableVPan

Gets or sets a value that determines whether or not panning is allowed for the control in the vertical direction.

Declaration
[Bindable(true)]
public bool IsEnableVPan { get; set; }
Property Value
Type Description
Boolean
Remarks

Panning is done by clicking the middle mouse button (or holding down the shift key while clicking the left mouse button) inside the Rect and dragging the mouse around to shift the scale ranges as desired.

See Also
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IsEnableVZoom

Gets or sets a value that determines whether or not zooming is allowed for the control in the vertical direction.

Declaration
[Bindable(true)]
public bool IsEnableVZoom { get; set; }
Property Value
Type Description
Boolean
Remarks

Zooming is done by left-clicking inside the Rect to drag out a rectangle, indicating the new scale ranges that will be part of the graph.

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IsEnableWheelZoom

Gets or sets a value that determines whether or not zooming is allowed via the mouse wheel.

Declaration
[Bindable(true)]
public bool IsEnableWheelZoom { get; set; }
Property Value
Type Description
Boolean
Remarks

Wheel zooming is done by rotating the mouse wheel. Note that this property is used in combination with the IsEnableHZoom and IsEnableVZoom properties to control zoom options.

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IsEnableZoom

Gets or sets a value that determines whether or not zooming is allowed for the control.

Declaration
[Bindable(true)]
public bool IsEnableZoom { set; }
Property Value
Type Description
Boolean
Remarks

Zooming is done by left-clicking inside the Rect to drag out a rectangle, indicating the new scale ranges that will be part of the graph.

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IsPrintFillPage

Gets or sets a value that determines whether or not the MasterPane Rect dimensions will be expanded to fill the available space when printing this ZedGraphControl.

Declaration
[Bindable(true)]
public bool IsPrintFillPage { get; set; }
Property Value
Type Description
Boolean
Remarks

If IsPrintKeepAspectRatio is also true, then the MasterPane Rect dimensions will be expanded to fit as large a space as possible while still honoring the visible aspect ratio.

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IsPrintKeepAspectRatio

Gets or sets a value that determines whether or not the visible aspect ratio of the MasterPane Rect will be preserved when printing this ZedGraphControl.

Declaration
[Bindable(true)]
public bool IsPrintKeepAspectRatio { get; set; }
Property Value
Type Description
Boolean
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IsPrintScaleAll

Gets or sets a value that determines whether the settings of IsFontsScaled and IsPenWidthScaled will be overridden to true during printing operations.

Declaration
[Bindable(true)]
public bool IsPrintScaleAll { get; set; }
Property Value
Type Description
Boolean

A value of true will cause both IsFontsScaled and IsPenWidthScaled to be temporarily set to true during printing operations.
Remarks

Printing involves pixel maps that are typically of a dramatically different dimension than on-screen pixel maps. Therefore, it becomes more important to scale the fonts and lines to give a printed image that looks like what is shown on-screen. The default setting for IsFontsScaled is true, but the default setting for IsPenWidthScaled is false.

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IsScrolling

Returns true if the user is currently scrolling via the scrollbar, or false if no scrolling is taking place.

Declaration
public bool IsScrolling { get; }
Property Value
Type Description
Boolean
Remarks

This method just tests ScrollBar.Capture to see if the mouse has been captured by the scroll bar. If so, scrolling is active.

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IsScrollY2

Gets or sets a value that determines if the vertical scroll bar will affect the Y2 axis.

Declaration
[Bindable(true)]
public bool IsScrollY2 { get; set; }
Property Value
Type Description
Boolean
Remarks

The vertical scroll bar is automatically associated with the Y axis. With this value, you can choose to include or exclude the Y2 axis with the scrolling. Note that the Y2 axis scrolling is handled as a secondary. The vertical scroll bar position always reflects the status of the Y axis. This can cause the Y2 axis to "jump" when first scrolled if the ScrollMinY2 and ScrollMaxY2 values are not set to the same proportions as ScrollMinY and ScrollMaxY with respect to the actual Min and Max. Also note that this property is actually just an alias to the IsScrollable property of the first element of YScrollRangeList.

See Also
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IsShowContextMenu

Gets or sets a value that determines whether or not the context menu will be available.

Declaration
[Bindable(true)]
public bool IsShowContextMenu { get; set; }
Property Value
Type Description
Boolean

true to allow the context menu, false to disable it
Remarks

The context menu is a menu that appears when you right-click on the ZedGraphControl. It provides options for Zoom, Pan, AutoScale, Clipboard Copy, and toggle IsShowPointValues.

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IsShowCopyMessage

Gets or sets a value that determines whether or not a message box will be shown in response to a context menu "Copy" command.

Declaration
[Bindable(true)]
public bool IsShowCopyMessage { get; set; }
Property Value
Type Description
Boolean
Remarks

Note that, if this property is set to false, the user will receive no indicative feedback in response to a Copy action.

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IsShowCursorValues

Gets or sets a value that determines whether or not tooltips will be displayed showing the current scale values when the mouse is within the Rect.

Declaration
[Bindable(true)]
public bool IsShowCursorValues { get; set; }
Property Value
Type Description
Boolean
Remarks

The displayed values are taken from the current mouse position, and formatted according to PointValueFormat and/or PointDateFormat. If this value is set to true, it overrides the IsShowPointValues setting.

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IsShowHScrollBar

Gets or sets a value that determines if the horizontal scroll bar will be visible.

Declaration
[Bindable(true)]
public bool IsShowHScrollBar { get; set; }
Property Value
Type Description
Boolean

A boolean value. true to display a horizontal scrollbar, false otherwise.
Remarks

This scroll bar allows the display to be scrolled in the horizontal direction. Another option is display panning, in which the user can move the display around by clicking directly on it and dragging (see IsEnableHPan and IsEnableVPan). You can control the available range of scrolling with the ScrollMinX and ScrollMaxX properties. Note that the scroll range can be set automatically by IsAutoScrollRange.
In most cases, you will probably want to disable IsBoundedRanges before activating this option.

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IsShowPointValues

Gets or sets a value that determines whether or not tooltips will be displayed when the mouse hovers over data values.

Declaration
[Bindable(true)]
public bool IsShowPointValues { get; set; }
Property Value
Type Description
Boolean
Remarks

The displayed values are taken from Tag if it is a String type, or ToString() otherwise (using the PointValueFormat as a format string). Additionally, the user can custom format the values using the PointValueEvent event. Note that IsShowPointValues may be overridden by IsShowCursorValues.

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IsShowVScrollBar

Gets or sets a value that determines if the vertical scroll bar will be visible.

Declaration
[Bindable(true)]
public bool IsShowVScrollBar { get; set; }
Property Value
Type Description
Boolean

A boolean value. true to display a vertical scrollbar, false otherwise.
Remarks

This scroll bar allows the display to be scrolled in the vertical direction. Another option is display panning, in which the user can move the display around by clicking directly on it and dragging (see IsEnableHPan and IsEnableVPan). You can control the available range of scrolling with the ScrollMinY and ScrollMaxY properties. Note that the vertical scroll bar only affects the YAxis; it has no impact on the Y2Axis. The panning options affect both the YAxis and Y2Axis. Note also that the scroll range can be set automatically by IsAutoScrollRange.
In most cases, you will probably want to disable IsBoundedRanges before activating this option.

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IsSynchronizeXAxes

Gets or sets a value that determines if the XAxis Scale ranges for all GraphPane objects in the MasterPane will be forced to match.

Declaration
[Bindable(true)]
public bool IsSynchronizeXAxes { get; set; }
Property Value
Type Description
Boolean
Remarks

If set to true (default is false), then all of the GraphPane objects in the MasterPane associated with this ZedGraphControl will be forced to have matching scale ranges for the x axis. That is, zoom, pan, and scroll operations will result in zoom/pan/scroll for all graphpanes simultaneously.

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IsSynchronizeYAxes

Gets or sets a value that determines if the YAxis Scale ranges for all GraphPane objects in the MasterPane will be forced to match.

Declaration
[Bindable(true)]
public bool IsSynchronizeYAxes { get; set; }
Property Value
Type Description
Boolean
Remarks

If set to true (default is false), then all of the GraphPane objects in the MasterPane associated with this ZedGraphControl will be forced to have matching scale ranges for the y axis. That is, zoom, pan, and scroll operations will result in zoom/pan/scroll for all graphpanes simultaneously.

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IsZoomOnMouseCenter

Gets or sets a boolean value that determines if zooming with the wheel mouse is centered on the mouse location, or centered on the existing graph.

Declaration
[Bindable(true)]
public bool IsZoomOnMouseCenter { get; set; }
Property Value
Type Description
Boolean
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LinkButtons

Gets or sets a value that determines which Mouse button will be used to click on linkable objects

Declaration
[Bindable(true)]
public MouseButtons LinkButtons { get; set; }
Property Value
Type Description
MouseButtons
See Also
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LinkModifierKeys

Gets or sets a value that determines which modifier keys will be used to click on linkable objects

Declaration
[Bindable(true)]
public Keys LinkModifierKeys { get; set; }
Property Value
Type Description
Keys
See Also
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MasterPane

Gets or sets the MasterPane property for the control

Declaration
[Bindable(false)]
[Browsable(false)]
public MasterPane MasterPane { get; set; }
Property Value
Type Description
MasterPane
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PanButtons

Gets or sets a value that determines which mouse button will be used as a primary option to trigger a pan event.

Declaration
[Bindable(true)]
public MouseButtons PanButtons { get; set; }
Property Value
Type Description
MouseButtons
Remarks

This value is combined with PanModifierKeys to determine the actual pan combination. A secondary pan button/key combination option is available via PanButtons2 and PanModifierKeys2. To not use this button/key combination, set the value of PanButtons to None.

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PanButtons2

Gets or sets a value that determines which mouse button will be used as the secondary option to trigger a pan event.

Declaration
[Bindable(true)]
public MouseButtons PanButtons2 { get; set; }
Property Value
Type Description
MouseButtons
Remarks

This value is combined with PanModifierKeys2 to determine the actual pan combination. The primary pan button/key combination option is available via PanButtons and PanModifierKeys. To not use this button/key combination, set the value of PanButtons2 to None.

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PanModifierKeys

Gets or sets a value that determines which modifier keys will be used as a primary option to trigger a pan event.

Declaration
[Bindable(true)]
public Keys PanModifierKeys { get; set; }
Property Value
Type Description
Keys
Remarks

This value is combined with PanButtons to determine the actual pan combination. A secondary pan button/key combination option is available via PanButtons2 and PanModifierKeys2. To not use this button/key combination, set the value of PanButtons to None.

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PanModifierKeys2

Gets or sets a value that determines which modifier keys will be used as a secondary option to trigger a pan event.

Declaration
[Bindable(true)]
public Keys PanModifierKeys2 { get; set; }
Property Value
Type Description
Keys
Remarks

This value is combined with PanButtons2 to determine the actual pan combination. A primary pan button/key combination option is available via PanButtons and PanModifierKeys. To not use this button/key combination, set the value of PanButtons2 to None.

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PointDateFormat

Gets or sets the format for displaying tooltip values. This format is passed to ToString(String).

Declaration
[Bindable(true)]
public string PointDateFormat { get; set; }
Property Value
Type Description
String
Remarks

Use the DateTimeFormatInfo type to determine the format strings.

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PointValueFormat

Gets or sets the format for displaying tooltip values. This format is passed to ToString(String).

Declaration
[Bindable(true)]
public string PointValueFormat { get; set; }
Property Value
Type Description
String
Remarks

Use the NumberFormatInfo type to determine the format strings.

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PrintDocument

Gets or sets the PrintDocument instance that is used for all of the context menu printing functions.

Declaration
public PrintDocument PrintDocument { get; set; }
Property Value
Type Description
PrintDocument
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SaveFileDialog

Gets or sets the SaveFileDialog instance that will be used by the "Save As..." context menu item.

Declaration
[Bindable(true)]
public SaveFileDialog SaveFileDialog { get; set; }
Property Value
Type Description
SaveFileDialog
Remarks

This provides the opportunity to modify the dialog, such as setting the InitialDirectory property.

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ScrollGrace

Set a "grace" value that leaves a buffer area around the data when IsAutoScrollRange is true.

Declaration
public double ScrollGrace { get; set; }
Property Value
Type Description
Double
Remarks

This value represents a fraction of the total range around each axis. For example, if the axis ranges from 0 to 100, then a 0.05 value for ScrollGrace would set the scroll range to -5 to 105.

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ScrollMaxX

The maximum value for the X axis scroll range.

Declaration
[Bindable(true)]
public double ScrollMaxX { get; set; }
Property Value
Type Description
Double

A double value indicating the maximum axis value
Remarks

Effectively, the maximum endpoint of the scroll range will cause the Max value to be set to ScrollMaxX. Note that this value applies only to the scroll bar settings. Axis panning (see IsEnableHPan) is not affected by this value. Note that this value can be overridden by IsAutoScrollRange and SetScrollRangeFromData().

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ScrollMaxY

The maximum value for the Y axis scroll range.

Declaration
[Bindable(true)]
public double ScrollMaxY { get; set; }
Property Value
Type Description
Double

A double value indicating the maximum axis value
Remarks

Effectively, the maximum endpoint of the scroll range will cause the Max value to be set to ScrollMaxY. Note that this value applies only to the scroll bar settings. Axis panning (see IsEnableVPan) is not affected by this value. Note that this value can be overridden by IsAutoScrollRange and SetScrollRangeFromData(). Also note that this property is actually just an alias to the Max property of the first element of YScrollRangeList.

See Also
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ScrollMaxY2

The maximum value for the Y2 axis scroll range.

Declaration
[Bindable(true)]
public double ScrollMaxY2 { get; set; }
Property Value
Type Description
Double

A double value indicating the maximum axis value
Remarks

Effectively, the maximum endpoint of the scroll range will cause the Max value to be set to ScrollMaxY2. Note that this value applies only to the scroll bar settings. Axis panning (see IsEnableVPan) is not affected by this value. Note that this value can be overridden by IsAutoScrollRange and SetScrollRangeFromData(). Also note that this property is actually just an alias to the Max property of the first element of Y2ScrollRangeList.

See Also
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ScrollMinX

The minimum value for the X axis scroll range.

Declaration
[Bindable(true)]
public double ScrollMinX { get; set; }
Property Value
Type Description
Double

A double value indicating the minimum axis value
Remarks

Effectively, the minimum endpoint of the scroll range will cause the Min value to be set to ScrollMinX. Note that this value applies only to the scroll bar settings. Axis panning (see IsEnableHPan) is not affected by this value. Note that this value can be overridden by IsAutoScrollRange and SetScrollRangeFromData().

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ScrollMinY

The minimum value for the Y axis scroll range.

Declaration
[Bindable(true)]
public double ScrollMinY { get; set; }
Property Value
Type Description
Double

A double value indicating the minimum axis value
Remarks

Effectively, the minimum endpoint of the scroll range will cause the Min value to be set to ScrollMinY. Note that this value applies only to the scroll bar settings. Axis panning (see IsEnableVPan) is not affected by this value. Note that this value can be overridden by IsAutoScrollRange and SetScrollRangeFromData(). Also note that this property is actually just an alias to the Min property of the first element of YScrollRangeList.

See Also
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ScrollMinY2

The minimum value for the Y2 axis scroll range.

Declaration
[Bindable(true)]
public double ScrollMinY2 { get; set; }
Property Value
Type Description
Double

A double value indicating the minimum axis value
Remarks

Effectively, the minimum endpoint of the scroll range will cause the Min value to be set to ScrollMinY2. Note that this value applies only to the scroll bar settings. Axis panning (see IsEnableVPan) is not affected by this value. Note that this value can be overridden by IsAutoScrollRange and SetScrollRangeFromData(). Also note that this property is actually just an alias to the Min property of the first element of Y2ScrollRangeList.

See Also
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SelectAppendModifierKeys

Gets or sets a value that determines which Modifier keys will be used to append a CurveItem to the selection list.

Declaration
[Bindable(true)]
public Keys SelectAppendModifierKeys { get; }
Property Value
Type Description
Keys
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SelectButtons

Gets or sets a value that determines which Mouse button will be used to select CurveItem's.

Declaration
[Bindable(true)]
public MouseButtons SelectButtons { get; set; }
Property Value
Type Description
MouseButtons
Remarks

This setting only applies if IsEnableSelection is true.

See Also
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Selection

Readonly property that gets the list of selected CurveItems

Declaration
public Selection Selection { get; }
Property Value
Type Description
Selection
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SelectModifierKeys

Gets or sets a value that determines which Modifier keys will be used to select CurveItem's.

Declaration
[Bindable(true)]
public Keys SelectModifierKeys { get; set; }
Property Value
Type Description
Keys
Remarks

This setting only applies if IsEnableSelection is true.

See Also
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UseExtendedPrintDialog

Gets or sets a value indicating whether the dialog should be shown in the Windows XP style for systems running Windows XP Home Edition, Windows XP Professional, Windows Server 2003?or later. The default is true.

Declaration
public bool UseExtendedPrintDialog { get; set; }
Property Value
Type Description
Boolean

true to indicate the dialog should be shown with the Windows XP style, otherwise false.
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Y2ScrollRangeList

Access the ScrollRangeList for the Y2 axes.

Declaration
[Bindable(true)]
public ScrollRangeList Y2ScrollRangeList { get; }
Property Value
Type Description
ScrollRangeList
Remarks

This list maintains the user scale ranges for the scroll bars for each axis in the Y2AxisList. Each ordinal location in Y2ScrollRangeList corresponds to an equivalent ordinal location in Y2AxisList.

See Also
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YScrollRangeList

Access the ScrollRangeList for the Y axes.

Declaration
[Bindable(true)]
public ScrollRangeList YScrollRangeList { get; }
Property Value
Type Description
ScrollRangeList
Remarks

This list maintains the user scale ranges for the scroll bars for each axis in the YAxisList. Each ordinal location in YScrollRangeList corresponds to an equivalent ordinal location in YAxisList.

See Also
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ZoomButtons

Gets or sets a value that determines which mouse button will be used as a primary option to trigger a zoom event.

Declaration
[Bindable(true)]
public MouseButtons ZoomButtons { get; set; }
Property Value
Type Description
MouseButtons
Remarks

This value is combined with ZoomModifierKeys to determine the actual zoom combination. A secondary zoom button/key combination option is available via ZoomButtons2 and ZoomModifierKeys2. To not use this button/key combination, set the value of ZoomButtons to None.

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ZoomButtons2

Gets or sets a value that determines which mouse button will be used as the secondary option to trigger a zoom event.

Declaration
[Bindable(true)]
public MouseButtons ZoomButtons2 { get; set; }
Property Value
Type Description
MouseButtons
Remarks

This value is combined with ZoomModifierKeys2 to determine the actual zoom combination. The primary zoom button/key combination option is available via ZoomButtons and ZoomModifierKeys. To not use this button/key combination, set the value of ZoomButtons2 to None.

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ZoomModifierKeys

Gets or sets a value that determines which modifier keys will be used as a primary option to trigger a zoom event.

Declaration
[Bindable(true)]
public Keys ZoomModifierKeys { get; set; }
Property Value
Type Description
Keys
Remarks

This value is combined with ZoomButtons to determine the actual zoom combination. A secondary zoom button/key combination option is available via ZoomButtons2 and ZoomModifierKeys2. To not use this button/key combination, set the value of ZoomButtons to None.

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ZoomModifierKeys2

Gets or sets a value that determines which modifier keys will be used as a secondary option to trigger a zoom event.

Declaration
[Bindable(true)]
public Keys ZoomModifierKeys2 { get; set; }
Property Value
Type Description
Keys
Remarks

This value is combined with ZoomButtons2 to determine the actual zoom combination. A primary zoom button/key combination option is available via ZoomButtons and ZoomModifierKeys. To not use this button/key combination, set the value of ZoomButtons2 to None.

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ZoomStepFraction

Gets or sets the step size fraction for zooming with the mouse wheel. A value of 0.1 will result in a 10% zoom step for each mouse wheel movement.

Declaration
[Bindable(true)]
public double ZoomStepFraction { get; set; }
Property Value
Type Description
Double

Methods

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AxisChange()

This performs an axis change command on the graphPane.

Declaration
public virtual void AxisChange()
Remarks

This is the same as ZedGraphControl.GraphPane.AxisChange( ZedGraphControl.CreateGraphics() ), however, this method also calls SetScrollRangeFromData() if IsAutoScrollRange is true.

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Copy(Boolean)

Handler for the "Copy" context menu item. Copies the current image to a bitmap on the clipboard.

Declaration
public void Copy(bool isShowMessage)
Parameters
Type Name Description
Boolean isShowMessage

boolean value that determines whether or not a prompt will be displayed. true to show a message of "Image Copied to ClipBoard".
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CopyEmf(Boolean)

Special handler that copies the current image to an Emf file on the clipboard.

Declaration
public void CopyEmf(bool isShowMessage)
Parameters
Type Name Description
Boolean isShowMessage

boolean value that determines whether or not a prompt will be displayed. true to show a message of "Image Copied to ClipBoard".
Remarks

This version is similar to the regular Copy(Boolean) method, except that it will place an Emf image (vector) on the ClipBoard instead of the regular bitmap.

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Dispose(Boolean)

Clean up any resources being used.

Declaration
protected override void Dispose(bool disposing)
Parameters
Type Name Description
Boolean disposing

true if the components should be disposed, false otherwise
Overrides
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DoPageSetup()

Display a PageSetupDialog to the user, allowing them to modify the print settings for this ZedGraphControl.

Declaration
public void DoPageSetup()
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DoPrint()

Display a PrintDialog to the user, allowing them to select a printer and print the MasterPane contained in this ZedGraphControl.

Declaration
public void DoPrint()
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DoPrintPreview()

Display a PrintPreviewDialog, allowing the user to preview and subsequently print the MasterPane contained in this ZedGraphControl.

Declaration
public void DoPrintPreview()
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GetImage()

Gets the graph pane's current image. Bitmap

Declaration
[Bindable(false)]
[Browsable(false)]
public Image GetImage()
Returns
Type Description
Image
Exceptions
Type Condition
ZedGraphException

When the control has been disposed before this call.
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MakeValueLabel(Axis, Double, Int32, Boolean)

Make a string label that corresponds to a user scale value.

Declaration
protected string MakeValueLabel(Axis axis, double val, int iPt, bool isOverrideOrdinal)
Parameters
Type Name Description
Axis axis

The axis from which to obtain the scale value. This determines if it's a date value, linear, log, etc.
Double val

The value to be made into a label
Int32 iPt

The ordinal position of the value
Boolean isOverrideOrdinal

true to override the ordinal settings of the axis, and prefer the actual value instead.
Returns
Type Description
String

The string label.
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MenuClick_Copy(Object, EventArgs)

Handler for the "Copy" context menu item. Copies the current image to a bitmap on the clipboard.

Declaration
protected void MenuClick_Copy(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
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MenuClick_PageSetup(Object, EventArgs)

Handler for the "Page Setup..." context menu item. Displays a PageSetupDialog.

Declaration
protected void MenuClick_PageSetup(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
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MenuClick_Print(Object, EventArgs)

Handler for the "Print..." context menu item. Displays a PrintDialog.

Declaration
protected void MenuClick_Print(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
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MenuClick_RestoreScale(Object, EventArgs)

Handler for the "Set Scale to Default" context menu item. Sets the scale ranging to full auto mode for all axes.

Declaration
protected void MenuClick_RestoreScale(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
Remarks

This method differs from the ZoomOutAll(GraphPane) method in that it sets the scales to full auto mode. The ZoomOutAll(GraphPane) method sets the scales to their initial setting prior to any user actions (which may or may not be full auto mode).

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MenuClick_SaveAs(Object, EventArgs)

Handler for the "Save Image As" context menu item. Copies the current image to the selected file.

Declaration
protected void MenuClick_SaveAs(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
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MenuClick_ShowValues(Object, EventArgs)

Handler for the "Show Values" context menu item. Toggles the IsShowPointValues property, which activates the point value tooltips.

Declaration
protected void MenuClick_ShowValues(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
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MenuClick_ZoomOut(Object, EventArgs)

Handler for the "UnZoom/UnPan" context menu item. Restores the scale ranges to the values before the last zoom or pan operation.

Declaration
protected void MenuClick_ZoomOut(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
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MenuClick_ZoomOutAll(Object, EventArgs)

Handler for the "Undo All Zoom/Pan" context menu item. Restores the scale ranges to the values before all zoom and pan operations

Declaration
protected void MenuClick_ZoomOutAll(object sender, EventArgs e)
Parameters
Type Name Description
Object sender
EventArgs e
Remarks

This method differs from the RestoreScale(GraphPane) method in that it sets the scales to their initial setting prior to any user actions. The RestoreScale(GraphPane) method sets the scales to full auto mode (regardless of what the initial setting may have been).

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OnPaint(PaintEventArgs)

Called by the system to update the control on-screen

Declaration
protected override void OnPaint(PaintEventArgs e)
Parameters
Type Name Description
PaintEventArgs e

A PaintEventArgs object containing the Graphics specifications for this Paint event.
Overrides
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PanScale(Axis, Double, Double)

Handle a panning operation for the specified Axis.

Declaration
protected void PanScale(Axis axis, double startVal, double endVal)
Parameters
Type Name Description
Axis axis

The Axis to be panned
Double startVal

The value where the pan started. The scale range will be shifted by the difference between and .
Double endVal

The value where the pan ended. The scale range will be shifted by the difference between and .
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RestoreScale(GraphPane)

Handler for the "Set Scale to Default" context menu item. Sets the scale ranging to full auto mode for all axes.

Declaration
public void RestoreScale(GraphPane primaryPane)
Parameters
Type Name Description
GraphPane primaryPane

The GraphPane object which is to have the scale restored
Remarks

This method differs from the ZoomOutAll(GraphPane) method in that it sets the scales to full auto mode. The ZoomOutAll(GraphPane) method sets the scales to their initial setting prior to any user actions (which may or may not be full auto mode).

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SaveAs()

Handler for the "Save Image As" context menu item. Copies the current image to the selected file in either the Emf (vector), or a variety of Bitmap formats.

Declaration
public void SaveAs()
Remarks

Note that SaveAsBitmap() and SaveAsEmf() methods are provided which allow for Bitmap-only or Emf-only handling of the "Save As" context menu item.

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SaveAs(String)

Copies the current image to the selected file in
Emf (vector), or a variety of Bitmap formats.

Declaration
public string SaveAs(string DefaultFileName)
Parameters
Type Name Description
String DefaultFileName

Accepts a default file name for the file dialog (if "" or null, default is not used)
Returns
Type Description
String

The file name saved, or "" if cancelled.
Remarks

Note that SaveAsBitmap() and SaveAsEmf() methods are provided which allow for Bitmap-only or Emf-only handling of the "Save As" context menu item.

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SaveAsBitmap()

Handler for the "Save Image As" context menu item. Copies the current image to the selected Bitmap file.

Declaration
public void SaveAsBitmap()
Remarks

Note that this handler saves as a bitmap only. The default handler is SaveAs(), which allows for Bitmap or EMF formats

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SaveAsEmf()

Handler for the "Save Image As" context menu item. Copies the current image to the selected Emf format file.

Declaration
public void SaveAsEmf()
Remarks

Note that this handler saves as an Emf format only. The default handler is SaveAs(), which allows for Bitmap or EMF formats.

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SetCursor()

Set the cursor according to the current mouse location.

Declaration
protected void SetCursor()
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SetCursor(Point)

Set the cursor according to the current mouse location.

Declaration
protected void SetCursor(Point mousePt)
Parameters
Type Name Description
Point mousePt
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SetScrollRangeFromData()

Sets the value of the scroll range properties (see ScrollMinX, ScrollMaxX, YScrollRangeList, and Y2ScrollRangeList based on the actual range of the data for each corresponding Axis.

Declaration
public void SetScrollRangeFromData()
Remarks

This method is called automatically by AxisChange() if IsAutoScrollRange is true. Note that this will not be called if you call AxisChange directly from the GraphPane. For example, zedGraphControl1.AxisChange() works properly, but zedGraphControl1.GraphPane.AxisChange() does not.

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ZedGraphControl_KeyDown(Object, KeyEventArgs)

Handle the Key Events so ZedGraph can Escape out of a panning or zooming operation.

Declaration
protected void ZedGraphControl_KeyDown(object sender, KeyEventArgs e)
Parameters
Type Name Description
Object sender
KeyEventArgs e
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ZedGraphControl_KeyUp(Object, KeyEventArgs)

Handle a KeyUp event

Declaration
protected void ZedGraphControl_KeyUp(object sender, KeyEventArgs e)
Parameters
Type Name Description
Object sender

The ZedGraphControl in which the KeyUp occurred.
KeyEventArgs e

A KeyEventArgs instance.
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ZedGraphControl_MouseDown(Object, MouseEventArgs)

Handle a MouseDown event in the ZedGraphControl

Declaration
protected void ZedGraphControl_MouseDown(object sender, MouseEventArgs e)
Parameters
Type Name Description
Object sender

A reference to the ZedGraphControl
MouseEventArgs e

A MouseEventArgs instance
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ZedGraphControl_MouseMove(Object, MouseEventArgs)

protected method for handling MouseMove events to display tooltips over individual datapoints.

Declaration
protected void ZedGraphControl_MouseMove(object sender, MouseEventArgs e)
Parameters
Type Name Description
Object sender

A reference to the control that has the MouseMove event.
MouseEventArgs e

A MouseEventArgs object.
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ZedGraphControl_MouseUp(Object, MouseEventArgs)

Handle a MouseUp event in the ZedGraphControl

Declaration
protected void ZedGraphControl_MouseUp(object sender, MouseEventArgs e)
Parameters
Type Name Description
Object sender

A reference to the ZedGraphControl
MouseEventArgs e

A MouseEventArgs instance
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ZedGraphControl_MouseWheel(Object, MouseEventArgs)

Handle a MouseWheel event in the ZedGraphControl

Declaration
protected void ZedGraphControl_MouseWheel(object sender, MouseEventArgs e)
Parameters
Type Name Description
Object sender

A reference to the ZedGraphControl
MouseEventArgs e

A MouseEventArgs instance
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ZedGraphControl_ReSize(Object, EventArgs)

Called when the control has been resized.

Declaration
protected void ZedGraphControl_ReSize(object sender, EventArgs e)
Parameters
Type Name Description
Object sender

A reference to the control that has been resized.
EventArgs e

An EventArgs object.
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ZoomOut(GraphPane)

Handler for the "UnZoom/UnPan" context menu item. Restores the scale ranges to the values before the last zoom, pan, or scroll operation.

Declaration
public void ZoomOut(GraphPane primaryPane)
Parameters
Type Name Description
GraphPane primaryPane

The primary GraphPane object which is to be zoomed out
Remarks

Triggers a ZoomEvent for any type of undo (including pan, scroll, zoom, and wheelzoom). This method will affect all the GraphPane objects in the MasterPane if IsSynchronizeXAxes or IsSynchronizeYAxes is true.

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ZoomOutAll(GraphPane)

Handler for the "Undo All Zoom/Pan" context menu item. Restores the scale ranges to the values before all zoom and pan operations

Declaration
public void ZoomOutAll(GraphPane primaryPane)
Parameters
Type Name Description
GraphPane primaryPane

The GraphPane object which is to be zoomed out
Remarks

This method differs from the RestoreScale(GraphPane) method in that it sets the scales to their initial setting prior to any user actions. The RestoreScale(GraphPane) method sets the scales to full auto mode (regardless of what the initial setting may have been).

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ZoomPane(GraphPane, Double, PointF, Boolean)

Zoom a specified pane in or out according to the specified zoom fraction.

Declaration
public void ZoomPane(GraphPane pane, double zoomFraction, PointF centerPt, bool isZoomOnCenter)
Parameters
Type Name Description
GraphPane pane

The GraphPane instance to be zoomed.
Double zoomFraction

The fraction by which to zoom, less than 1 to zoom in, greater than 1 to zoom out. For example, 0.9 will zoom in such that the scale is 90% of what it was originally.
PointF centerPt

The screen position about which the zoom will be centered. This value is only used if is true.
Boolean isZoomOnCenter

true to cause the zoom to be centered on the point , false to center on the Rect.
Remarks

The zoom will occur on the XAxis, YAxis, and Y2Axis only if the corresponding flag, IsEnableHZoom or IsEnableVZoom, is true. Note that if there are multiple Y or Y2 axes, all of them will be zoomed.

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ZoomPane(GraphPane, Double, PointF, Boolean, Boolean)

Zoom a specified pane in or out according to the specified zoom fraction.

Declaration
protected void ZoomPane(GraphPane pane, double zoomFraction, PointF centerPt, bool isZoomOnCenter, bool isRefresh)
Parameters
Type Name Description
GraphPane pane

The GraphPane instance to be zoomed.
Double zoomFraction

The fraction by which to zoom, less than 1 to zoom in, greater than 1 to zoom out. For example, 0.9 will zoom in such that the scale is 90% of what it was originally.
PointF centerPt

The screen position about which the zoom will be centered. This value is only used if is true.
Boolean isZoomOnCenter

true to cause the zoom to be centered on the point , false to center on the Rect.
Boolean isRefresh

true to force a refresh of the control, false to leave it unrefreshed
Remarks

The zoom will occur on the XAxis, YAxis, and Y2Axis only if the corresponding flag, IsEnableHZoom or IsEnableVZoom, is true. Note that if there are multiple Y or Y2 axes, all of them will be zoomed.

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ZoomScale(Axis, Double, Double, Boolean)

Zoom the specified axis by the specified amount, with the center of the zoom at the (optionally) specified point.

Declaration
protected void ZoomScale(Axis axis, double zoomFraction, double centerVal, bool isZoomOnCenter)
Parameters
Type Name Description
Axis axis

The Axis to be zoomed.
Double zoomFraction

The zoom fraction, less than 1.0 to zoom in, greater than 1.0 to zoom out. That is, a value of 0.9 will zoom in such that the scale length is 90% of what it previously was.
Double centerVal

The location for the center of the zoom. This is only used if is true.
Boolean isZoomOnCenter

true if the zoom is to be centered at the screen position, false for the zoom to be centered within the Rect.
Remarks

This method is used for MouseWheel zoom operations

Events

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ContextMenuBuilder

Subscribe to this event to be able to modify the ZedGraph context menu.

Declaration
[Bindable(true)]
public event ZedGraphControl.ContextMenuBuilderEventHandler ContextMenuBuilder
Event Type
Type Description
ZedGraphControl.ContextMenuBuilderEventHandler
Remarks

The context menu is built on the fly after a right mouse click. You can add menu items to this menu by simply modifying the parameter.

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CursorValueEvent

Subscribe to this event to provide custom formatting for the cursor value tooltips

Declaration
[Bindable(true)]
public event ZedGraphControl.CursorValueHandler CursorValueEvent
Event Type
Type Description
ZedGraphControl.CursorValueHandler
Examples

To subscribe to this event, use the following in your FormLoad method:

zedGraphControl1.CursorValueEvent +=
new ZedGraphControl.CursorValueHandler( MyCursorValueHandler );

Add this method to your Form1.cs:

   private string MyCursorValueHandler( object sender, GraphPane pane, Point mousePt )
   {
   #region
	double x, y;
	pane.ReverseTransform( mousePt, out x, out y );
	return "( " + x.ToString( "f2" ) + ", " + y.ToString( "f2" ) + " )";
   #endregion
   }
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DoubleClickEvent

Subscribe to this event to provide notification of Double Clicks on graph objects

Declaration
[Bindable(true)]
public event ZedGraphControl.ZedMouseEventHandler DoubleClickEvent
Event Type
Type Description
ZedGraphControl.ZedMouseEventHandler
Remarks

This event provides for a notification when the mouse is double-clicked on an object within any GraphPane of the MasterPane associated with this ZedGraphControl. This event will use the FindNearestPaneObject(PointF, Graphics, out GraphPane, out Object, out Int32) method to determine which object was clicked. The boolean value that you return from this handler determines whether or not the ZedGraphControl will do any further handling of the DoubleClick event (see ZedGraphControl.ZedMouseEventHandler). Return true if you have handled the DoubleClick event entirely, and you do not want the ZedGraphControl to do any further action. Return false if ZedGraph should go ahead and process the DoubleClick event.

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LinkEvent

Subscribe to this event to be able to respond to mouse clicks within linked objects.

Declaration
[Bindable(true)]
public event ZedGraphControl.LinkEventHandler LinkEvent
Event Type
Type Description
ZedGraphControl.LinkEventHandler
Remarks

Linked objects are typically either GraphObj type objects or CurveItem type objects. These object types can include hyperlink information allowing for "drill-down" type operation.

See Also
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MouseDown

Hide the standard control MouseDown event so that the ZedGraphControl.MouseDownEvent can be used. This is so that the user must return true/false in order to indicate whether or not we should respond to the event.

Declaration
[Bindable(false)]
[Browsable(false)]
public event MouseEventHandler MouseDown
Event Type
Type Description
MouseEventHandler
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MouseDownEvent

Subscribe to this event to provide notification of MouseDown clicks on graph objects

Declaration
[Bindable(true)]
public event ZedGraphControl.ZedMouseEventHandler MouseDownEvent
Event Type
Type Description
ZedGraphControl.ZedMouseEventHandler
Remarks

This event provides for a notification when the mouse is clicked on an object within any GraphPane of the MasterPane associated with this ZedGraphControl. This event will use the FindNearestPaneObject(PointF, Graphics, out GraphPane, out Object, out Int32) method to determine which object was clicked. The boolean value that you return from this handler determines whether or not the ZedGraphControl will do any further handling of the MouseDown event (see ZedGraphControl.ZedMouseEventHandler). Return true if you have handled the MouseDown event entirely, and you do not want the ZedGraphControl to do any further action (e.g., starting a zoom operation). Return false if ZedGraph should go ahead and process the MouseDown event.

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MouseMoveEvent

Subscribe to this event to provide notification of MouseMove events over graph objects

Declaration
[Bindable(true)]
public event ZedGraphControl.ZedMouseEventHandler MouseMoveEvent
Event Type
Type Description
ZedGraphControl.ZedMouseEventHandler
Remarks

This event provides for a notification when the mouse is moving over on the control. The boolean value that you return from this handler determines whether or not the ZedGraphControl will do any further handling of the MouseMove event (see ZedGraphControl.ZedMouseEventHandler). Return true if you have handled the MouseMove event entirely, and you do not want the ZedGraphControl to do any further action. Return false if ZedGraph should go ahead and process the MouseMove event.

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MouseUp

Hide the standard control MouseUp event so that the ZedGraphControl.MouseUpEvent can be used. This is so that the user must return true/false in order to indicate whether or not we should respond to the event.

Declaration
[Bindable(false)]
[Browsable(false)]
public event MouseEventHandler MouseUp
Event Type
Type Description
MouseEventHandler
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MouseUpEvent

Subscribe to this event to provide notification of MouseUp clicks on graph objects

Declaration
[Bindable(true)]
public event ZedGraphControl.ZedMouseEventHandler MouseUpEvent
Event Type
Type Description
ZedGraphControl.ZedMouseEventHandler
Remarks

This event provides for a notification when the mouse is clicked on an object within any GraphPane of the MasterPane associated with this ZedGraphControl. This event will use the FindNearestPaneObject(PointF, Graphics, out GraphPane, out Object, out Int32) method to determine which object was clicked. The boolean value that you return from this handler determines whether or not the ZedGraphControl will do any further handling of the MouseUp event (see ZedGraphControl.ZedMouseEventHandler). Return true if you have handled the MouseUp event entirely, and you do not want the ZedGraphControl to do any further action (e.g., starting a zoom operation). Return false if ZedGraph should go ahead and process the MouseUp event.

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PointEditEvent

Subscribe to this event to receive notifcation and/or respond after a data point has been edited via IsEnableHEdit and IsEnableVEdit.

Declaration
[Bindable(true)]
public event ZedGraphControl.PointEditHandler PointEditEvent
Event Type
Type Description
ZedGraphControl.PointEditHandler
Examples

To subscribe to this event, use the following in your Form_Load method:

zedGraphControl1.PointEditEvent +=
new ZedGraphControl.PointEditHandler( MyPointEditHandler );

Add this method to your Form1.cs:

   private string MyPointEditHandler( object sender, GraphPane pane, CurveItem curve, int iPt )
   {
       PointPair pt = curve[iPt];
       return "This value is " + pt.Y.ToString("f2") + " gallons";
   }
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PointValueEvent

Subscribe to this event to provide custom formatting for the tooltips

Declaration
[Bindable(true)]
public event ZedGraphControl.PointValueHandler PointValueEvent
Event Type
Type Description
ZedGraphControl.PointValueHandler
Examples

To subscribe to this event, use the following in your FormLoad method:

zedGraphControl1.PointValueEvent +=
new ZedGraphControl.PointValueHandler( MyPointValueHandler );

Add this method to your Form1.cs:

   private string MyPointValueHandler( object sender, GraphPane pane, CurveItem curve, int iPt )
   {
   #region
       PointPair pt = curve[iPt];
       return "This value is " + pt.Y.ToString("f2") + " gallons";
   #endregion
   }
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ScrollDoneEvent

Subscribe to this event to be notified when the GraphPane is scrolled by the user using the scrollbars.

Declaration
[Bindable(true)]
public event ZedGraphControl.ScrollDoneHandler ScrollDoneEvent
Event Type
Type Description
ZedGraphControl.ScrollDoneHandler
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ScrollEvent

Subscribe to this event to be notified when the GraphPane is scrolled by the user using the scrollbars.

Declaration
[Bindable(true)]
public event ScrollEventHandler ScrollEvent
Event Type
Type Description
ScrollEventHandler
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ScrollProgressEvent

Subscribe to this event to be notified when the GraphPane is scrolled by the user using the scrollbars.

Declaration
[Bindable(true)]
public event ZedGraphControl.ScrollProgressHandler ScrollProgressEvent
Event Type
Type Description
ZedGraphControl.ScrollProgressHandler
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ZoomEvent

Subscribe to this event to be notified when the GraphPane is zoomed or panned by the user, either via a mouse drag operation or by the context menu commands.

Declaration
[Bindable(true)]
public event ZedGraphControl.ZoomEventHandler ZoomEvent
Event Type
Type Description
ZedGraphControl.ZoomEventHandler

Implements