org.vishia.gral.swt

Class SwtCanvasArea

java.lang.Object

org.vishia.gral.base.GralWidget.ImplAccess

org.vishia.gral.widget.GralCanvasArea._GraphicImplAccess_

org.vishia.gral.swt.SwtCanvasArea

All Implemented Interfaces:

GralWidgImplAccess_ifc

public class SwtCanvasArea
extends GralCanvasArea._GraphicImplAccess_

Implementation of GralPlotArea to SET

Field Summary

Fields

Modifier and Type	Field and Description
private SwtMng	mng
(package private) PaintListener	paintListener
static java.lang.String	sVersion Version, history and license.
private SwtWdgCanvas	swtCanvas This is the Swt widget of this GralWidget.

Fields inherited from class org.vishia.gral.base.GralWidget.ImplAccess

bRedrawOnlyDynamics, chgBitsDerived, chgColorBack, chgColorLine, chgColorText, chgCurrTab, chgEditable, chgFloat, chgFocus, chgFont, chgIntg, chgInvisible, chgObjects, chgPos, chgText, chgVisible, chgVisibleInfo, mngImpl, pixBounds, wdgimpl, widgg

Fields inherited from interface org.vishia.gral.base.GralWidgImplAccess_ifc

version

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SwtCanvasArea(GralCanvasArea gralPlotArea, SwtMng mng)

Method Summary

Modifier and Type	Method and Description
void	redrawGthread() This method should be implemented in all Widget implementations of the adapter for the underlying graphic system.
void	setVisibleGThread(boolean bVisible) Sets the implementation widget(s) visible state.
void	updateValuesForAction() This operation should be called before any action is invoked in the user space.

Methods inherited from class org.vishia.gral.widget.GralCanvasArea._GraphicImplAccess_

canvasStore, getPixelPositionSize, removeWidgetImplementation, setBoundsPixel, setFocusGThread

Methods inherited from class org.vishia.gral.base.GralWidget.ImplAccess

acknChanged, actionShow, dyda, getActionChange, getChanged, getWidgetImplementation, gralMng, gralWidgetFromImplData, redrawOnlyDynamics, setDragEnable, setDropEnable, setPosBounds, setTextChanged, setVisibleState, XXXfocusGained

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

sVersion

public static final java.lang.String sVersion

Version, history and license.

• 2015-09-26 Hartmut creation.

Copyright/Copyleft: For this source the LGPL Lesser General Public License, published by the Free Software Foundation is valid. It means:

1. You can use this source without any restriction for any desired purpose.
2. You can redistribute copies of this source to everybody.
3. Every user of this source, also the user of redistribute copies with or without payment, must accept this license for further using.
4. But the LPGL is not appropriate for a whole software product, if this source is only a part of them. It means, the user must publish this part of source, but don't need to publish the whole source of the own product.
5. You can study and modify (improve) this source for own using or for redistribution, but you have to license the modified sources likewise under this LGPL Lesser General Public License. You mustn't delete this Copyright/Copyleft inscription in this source file.

If you are intent to use this sources without publishing its usage, you can get a second license subscribing a special contract with the author.

See Also:

Constant Field Values

swtCanvas

private final SwtWdgCanvas swtCanvas

This is the Swt widget of this GralWidget. It is a Composite.

mng

private final SwtMng mng

paintListener

PaintListener paintListener

Constructor Detail

SwtCanvasArea

protected SwtCanvasArea(GralCanvasArea gralPlotArea,
                        SwtMng mng)

Method Detail

redrawGthread

public void redrawGthread()

Description copied from interface: GralWidgImplAccess_ifc

This method should be implemented in all Widget implementations of the adapter for the underlying graphic system.
Implementation hints: In SWT it should call redraw(). In AWT this is named 'repaint()'-
It is possible that the widget consists of more as one graphical widget, then all of it should be redrawn. It is possible that some data are set in another thread, they should be applied to the widgets firstly. It is possible that the widget is removed though a repaintGthread-order is pending from the time before deleting, for example if the graphic layout is changed.

See #repaintRequ

setVisibleGThread

public void setVisibleGThread(boolean bVisible)

Description copied from interface: GralWidgImplAccess_ifc

Sets the implementation widget(s) visible state. The widgets are really invisible, or they are visible in principle, but they can be covered by other windows or clipping. This method should set the GralWidgetBase.bVisibleState too. Therewith it is able to quest GralWidget.isVisible() in any thread.

Parameters:

bVisible - true then the widget should be visible, false it is set to invisible.

updateValuesForAction

public void updateValuesForAction()

Description copied from interface: GralWidgImplAccess_ifc

This operation should be called before any action is invoked in the user space. It should update all values from the implementation widget to the GralWidget to enable getting it in the action.