Command Widget Application header file <X11/Xaw/Command.h> Class header file <X11/Xaw/CommandP.h> Class commandWidgetClass Class Name Command Superclass Label The Command widget is an area, often rectangular, that contains text or a graphical image. Command widgets are often referred to as ``push buttons.'' When the pointer is over a Command widget, the widget becomes highlighted by drawing a rectangle around its perimeter. This highlighting indicates that the widget is ready for selection. When mouse button 1 is pressed, the Command widget indicates that it has been selected by reversing its foreground and background colors. When the mouse button is released, the Command widget's notify action is invoked, calling all functions on its callback list. If the pointer is moved off of the widget before the pointer button is released, the widget reverts to its normal foreground and background colors, and releasing the pointer button has no effect. This behavior allows the user to cancel an action. Resources When creating a Command widget instance, the following resources are retrieved from the argument list or from the resource database: Name Class Type Notes Default Value accelerators Accelerators AcceleratorTable NULL ancestorSensitive AncestorSensitive Boolean D True background Background Pixel XtDefaultBackground backgroundPixmap Pixmap Pixmap XtUnspecifiedPixmap bitmap Bitmap Pixmap None borderColor BorderColor Pixel XtDefaultForeground borderPixmap Pixmap Pixmap XtUnspecifiedPixmap borderWidth BorderWidth Dimension 1 callback Callback XtCallbackList NULL colormap Colormap Colormap Parent's Colormap cornerRoundPercent CornerRoundPercent Dimension 25 cursor Cursor Cursor None cursorName Cursor String NULL depth Depth int C Parent's Depth destroyCallback Callback XtCallbackList NULL encoding Encoding UnsignedChar XawTextEncoding8bit font Font XFontStruct XtDefaultFont foreground Foreground Pixel XtDefaultForeground height Height Dimension A graphic height + 2 * internalHeight highlightThickness Thickness Dimension A 2 (0 if Shaped) insensitiveBorder Insensitive Pixmap GreyPixmap internalHeight Height Dimension 2 internalWidth Width Dimension 4 international International Boolean C False justify Justify Justify XtJustifyCenter (center) label Label String name of widget leftBitmap LeftBitmap Bitmap None mappedWhenManaged MappedWhenManaged Boolean True pointerColor Foreground Pixel XtDefaultForeground pointerColorBackground Background Pixel XtDefaultBackground resize Resize Boolean True screen Screen Screen R Parent's Screen sensitive Sensitive Boolean True shapeStyle ShapeStyle ShapeStyle Rectangle translations Translations TranslationTable See below width Width Dimension A graphic width + 2 * internalWidth x Position Position 0 y Position Position 0 _ \" Resource Descriptions Command Actions The Command widget supports the following actions: Switching the button's interior between the foreground and background colors with set, unset, and reset. Processing application callbacks with notify Switching the internal border between highlighted and unhighlighted states with highlight and unhighlight The following are the default translation bindings used by the Command widget: <EnterWindow>: highlight(\|) <LeaveWindow>: reset(\|) <Btn1Down>: set(\|) <Btn1Up>: notify(\|) unset(\|) The full list of actions supported by Command is: highlight(condition) Displays the internal highlight border in the color (foreground or background ) that contrasts with the interior color of the Command widget. The conditions WhenUnset and Always are understood by this action procedure. If no argument is passed, WhenUnset is assumed. unhighlight(\|) Displays the internal highlight border in the color (foreground or background ) that matches the interior color of the Command widget. set(\|) Enters the set state, in which notify is possible. This action causes the button to display its interior in the foreground color. The label or bitmap is displayed in the background color. unset(\|) Cancels the set state and displays the interior of the button in the background color. The label or bitmap is displayed in the foreground color. reset(\|) Cancels any set or highlight and displays the interior of the button in the background color, with the label or bitmap displayed in the foreground color. notify(\|) When the button is in the set state this action calls all functions in the callback list named by the callback resource. The value of the call_data argument passed to these functions is undefined. A very common alternative to registering callbacks is to augment a Command's translations with an action performing the desired function. This often takes the form of: *Myapp*save.translations: #augment <Btn1Down>,<Btn1Up>: Save() When a bitmap of depth greater that one (1) is specified the set(), unset(), and reset() actions have no effect, since there are no foreground and background colors used in a multi-plane pixmap.