AccordionControl.CustomDrawHamburgerButton Event
Fires before the hamburger button is displayed. Provides access to a drawing surface and allows you to draw the hamburger button.
Namespace: DevExpress.XtraBars.Navigation
Assembly: DevExpress.XtraBars.v21.1.dll
Declaration
Event Data
The CustomDrawHamburgerButton event's data class is CustomDrawHamburgerButtonEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Bounds | Gets the hamburger button bounds. |
| Cache | Provides access to a drawing surface and a pen/brush/font cache. |
| Handled | Gets or sets whether the event is handled. |
| State | Gets the hamburger button state: normal, hot tracked, pressed, disabled, or selected. |
The event data class exposes the following methods:
| Method | Description |
|---|---|
| DefaultDraw() | Draws the default hamburger button. |
Example
The code below shows how to draw a custom image in the hamburger button.
private void accordionControl_CustomDrawHamburgerButton(object sender, CustomDrawHamburgerButtonEventArgs e) {
// The State event argument returns whether the hamburger button is
// enabled, disabled, hot tracked, etc.
if (e.State == DevExpress.Utils.Drawing.ObjectState.Normal) {
SvgImage image = svgImageCollection1[1];
var palette = SvgPaletteHelper.GetSvgPalette(this.LookAndFeel, ObjectState.Normal);
e.Cache.DrawImage(image.Render(e.Bounds.Size, palette), e.Bounds.Location);
// The Handled event argument should be set to true
// to prevent the default draw algorithm from being invoked.
e.Handled = true;
}
}
See Also
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