Package org.eclipse.swt.graphics
Interface Drawable
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- All Known Implementing Classes:
AbstractHyperlink,AnimatedProgress,Browser,Button,Canvas,CBanner,CCombo,CLabel,Combo,CompareViewerPane,CompareViewerSwitchingPane,Composite,Control,CoolBar,CTabFolder,DateTime,Decorations,Device,Display,DrillDownComposite,ExpandableComposite,ExpandBar,FilteredList,FilteredTree,Form,FormText,GLCanvas,Group,Hyperlink,Image,ImageHyperlink,Label,Link,List,MessageLine,OleClientSite,OleControlSite,OleFrame,PageBook,Printer,ProgressBar,ProgressIndicator,ProgressMonitorPart,Sash,SashForm,Scale,Scrollable,ScrolledComposite,ScrolledForm,ScrolledFormText,ScrolledPageBook,Section,SharedScrolledComposite,Shell,Slider,Spinner,Splitter,StyledText,TabFolder,Table,TableCursor,Text,ToggleHyperlink,ToolBar,Tree,TreeCursor,TreeNode,Twistie,ViewForm
public interface DrawableImplementers ofDrawablecan have a graphics context (GC) created for them, and then they can be drawn on by sending messages to their associated GC. SWT images, and device objects such as the Display device and the Printer device, are drawables.IMPORTANT: This interface is not part of the SWT public API. It is marked public only so that it can be shared within the packages provided by SWT. It should never be referenced from application code.
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description voidinternal_dispose_GC(long handle, GCData data)Invokes platform specific functionality to dispose a GC handle.longinternal_new_GC(GCData data)Invokes platform specific functionality to allocate a new GC handle.default booleanisAutoScalable()Returnstrueiff coordinates can be auto-scaled on this drawable andfalseif not.
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Method Detail
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internal_new_GC
long internal_new_GC(GCData data)
Invokes platform specific functionality to allocate a new GC handle.IMPORTANT: This method is not part of the public API for
Drawable. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.- Parameters:
data- the platform specific GC data- Returns:
- the platform specific GC handle
- Restriction:
- This method is not intended to be referenced by clients.
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internal_dispose_GC
void internal_dispose_GC(long handle, GCData data)Invokes platform specific functionality to dispose a GC handle.IMPORTANT: This method is not part of the public API for
Drawable. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code.- Parameters:
handle- the platform specific GC handledata- the platform specific GC data- Restriction:
- This method is not intended to be referenced by clients.
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isAutoScalable
default boolean isAutoScalable()
Returnstrueiff coordinates can be auto-scaled on this drawable andfalseif not. E.g. aGCmethod should not auto-scale the bounds of a figure drawn on a Printer device, but it may have to auto-scale when drawing on a high-DPI Display monitor.- Returns:
trueif auto-scaling is enabled for this drawable- Restriction:
- This method is not intended to be referenced by clients.
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