C# Class Xwt.Canvas

Inheritance: Xwt.Widget

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Private Properties

Свойство	Type	Description

Méthodes publiques

Méthode	Description
AddChild ( Xwt.Widget w ) : void	Adds a child widget. The widget is placed in the canvas area, at the position (0,0) using the preferred size of the widget
AddChild ( Xwt.Widget widget, Xwt.Rectangle bounds ) : void	Adds a child widget. The widget is placed in the canvas area, in the specified coordinates and using the specified size
AddChild ( Xwt.Widget w, double x, double y ) : void	Adds a child widget. The widget is placed in the canvas area, at the specified coordinates, using the preferred size of the widget
Canvas ( ) : System
Clear ( ) : void	Removes all children of the Canvas
GetChildBounds ( Xwt.Widget widget ) : Xwt.Rectangle	Gets the bounds of a child widget
QueueDraw ( ) : void	Invalidates and forces the redraw of the whole area of the widget
QueueDraw ( Xwt.Rectangle rect ) : void	Invalidates and forces the redraw of a rectangular area of the widget
RemoveChild ( Xwt.Widget widget ) : void	Removes a child widget
SetChildBounds ( Xwt.Widget widget, Xwt.Rectangle bounds ) : void	Sets the position and size of a child widget

Méthodes protégées

Méthode	Description
CreateBackendHost ( ) : BackendHost
Dispose ( bool disposing ) : void
OnDraw ( Xwt.Drawing.Context ctx, Xwt.Rectangle dirtyRect ) : void	Called when the widget needs to be redrawn

Method Details

AddChild() public méthode

Adds a child widget.

The widget is placed in the canvas area, at the position (0,0) using the preferred size of the widget

public AddChild ( Xwt.Widget w ) : void
w	Xwt.Widget	/// The widget ///
Résultat	void

AddChild() public méthode

Adds a child widget.

The widget is placed in the canvas area, in the specified coordinates and using the specified size

public AddChild ( Xwt.Widget widget, Xwt.Rectangle bounds ) : void
widget	Xwt.Widget	/// The widget ///
bounds	Xwt.Rectangle	/// Position and size of the child widget, in container coordinates ///
Résultat	void

AddChild() public méthode

Adds a child widget.

The widget is placed in the canvas area, at the specified coordinates, using the preferred size of the widget

public AddChild ( Xwt.Widget w, double x, double y ) : void
w	Xwt.Widget	/// The widget ///
x	double	/// X coordinate ///
y	double	/// Y coordinate ///
Résultat	void

Canvas() public méthode

public Canvas ( ) : System
Résultat	System

Clear() public méthode

Removes all children of the Canvas

public Clear ( ) : void
Résultat	void

CreateBackendHost() protected méthode

protected CreateBackendHost ( ) : BackendHost
Résultat	BackendHost

Dispose() protected méthode

protected Dispose ( bool disposing ) : void
disposing	bool
Résultat	void

GetChildBounds() public méthode

Gets the bounds of a child widget

If the widget is not a child of this canvas

public GetChildBounds ( Xwt.Widget widget ) : Xwt.Rectangle
widget	Xwt.Widget	/// The widget ///
Résultat	Xwt.Rectangle

OnDraw() protected méthode

Called when the widget needs to be redrawn

protected OnDraw ( Xwt.Drawing.Context ctx, Xwt.Rectangle dirtyRect ) : void
ctx	Xwt.Drawing.Context	/// Drawing context ///
dirtyRect	Xwt.Rectangle
Résultat	void

QueueDraw() public méthode

Invalidates and forces the redraw of the whole area of the widget

public QueueDraw ( ) : void
Résultat	void

QueueDraw() public méthode

Invalidates and forces the redraw of a rectangular area of the widget

public QueueDraw ( Xwt.Rectangle rect ) : void
rect	Xwt.Rectangle	/// Area to invalidate ///
Résultat	void

RemoveChild() public méthode

Removes a child widget

If the widget is not a child of this canvas

public RemoveChild ( Xwt.Widget widget ) : void
widget	Xwt.Widget	/// The widget to remove. The widget must have been previously added using AddChild. ///
Résultat	void

SetChildBounds() public méthode

Sets the position and size of a child widget

If the widget is not a child of this canvas

public SetChildBounds ( Xwt.Widget widget, Xwt.Rectangle bounds ) : void
widget	Xwt.Widget	/// The child widget. It must have been added using the AddChild method. ///
bounds	Xwt.Rectangle	/// New bounds, in container coordinates ///
Résultat	void