C# Class LongoMatch.Drawing.SelectionCanvas

A selection canvas supports selecting ICanvasSelectableObject objects from the canvas and moving, resizing them.

Inheritance: Canvas

Show file Open project: GNOME/longomatch

Public Methods

Method	Description
ClearSelection ( ) : void	Reset the list of select objects
SelectionCanvas ( IWidget widget ) : System

Protected Methods

Method	Description
ClearObjects ( ) : void	Clears the objects.
CursorMoved ( Point coords ) : void	Called when the cursor is being moved. Highlights objects when the cursor passes over them.
Dispose ( bool disposing ) : void
GetSelection ( Point coords, bool inMotion = false, bool skipSelected = false ) : Selection
HandleLeftButton ( Point coords, ButtonModifier modif ) : void
HandleMotionEvent ( Point coords ) : void
HandleRightButton ( Point coords, ButtonModifier modif ) : void
SelectionChanged ( List sel ) : void	Notifies subclasses when the selected objects has changed.
SelectionMoved ( Selection sel ) : void	Notifies subclasses when an object has been moved.
ShowMenu ( Point coords ) : void	Notifies subclasses a menu should be displayed. Canvas' with menus should override it to display their menu here.
StartMove ( Selection sel ) : void	Notifies subclasses when an object starts to be moved.
StopMove ( bool moved ) : void	Notifies subclass when the move process stops.
UpdateSelection ( Selection sel, bool notify = true ) : void	Updates the current selection. If sel is `null`, it clears the current selection. If sel wasn't previously selected, it's added to the list of selected objects, otherwise it's removed from the list.

Private Methods

Method	Description
HandleButtonPressEvent ( Point coords, uint time, ButtonType type, ButtonModifier modifier ) : void
HandleButtonReleasedEvent ( Point coords, ButtonType type, ButtonModifier modifier ) : void
HandleShowTooltipEvent ( Point coords ) : void

Method Details

ClearObjects() protected method

Clears the objects.

protected ClearObjects ( ) : void
return	void

ClearSelection() public method

Reset the list of select objects

public ClearSelection ( ) : void
return	void

CursorMoved() protected method

Called when the cursor is being moved. Highlights objects when the cursor passes over them.

protected CursorMoved ( Point coords ) : void
coords	Point	Coords.
return	void

Dispose() protected method

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

GetSelection() protected method

protected GetSelection ( Point coords, bool inMotion = false, bool skipSelected = false ) : Selection
coords	Point
inMotion	bool
skipSelected	bool
return	LongoMatch.Core.Store.Drawables.Selection

HandleLeftButton() protected method

protected HandleLeftButton ( Point coords, ButtonModifier modif ) : void
coords	Point
modif	ButtonModifier
return	void

HandleMotionEvent() protected method

protected HandleMotionEvent ( Point coords ) : void
coords	Point
return	void

HandleRightButton() protected method

protected HandleRightButton ( Point coords, ButtonModifier modif ) : void
coords	Point
modif	ButtonModifier
return	void

SelectionCanvas() public method

public SelectionCanvas ( IWidget widget ) : System
widget	IWidget
return	System

SelectionChanged() protected method

Notifies subclasses when the selected objects has changed.

protected SelectionChanged ( List sel ) : void
sel	List	List of selected objects.
return	void

SelectionMoved() protected method

Notifies subclasses when an object has been moved.

protected SelectionMoved ( Selection sel ) : void
sel	LongoMatch.Core.Store.Drawables.Selection	The selection moved.
return	void

ShowMenu() protected method

Notifies subclasses a menu should be displayed. Canvas' with menus should override it to display their menu here.

protected ShowMenu ( Point coords ) : void
coords	Point	Position where the click happens.
return	void

StartMove() protected method

Notifies subclasses when an object starts to be moved.

protected StartMove ( Selection sel ) : void
sel	LongoMatch.Core.Store.Drawables.Selection	The selection moved.
return	void

StopMove() protected method

Notifies subclass when the move process stops.

protected StopMove ( bool moved ) : void
moved	bool	If set to true, the object position changed.
return	void

UpdateSelection() protected method

Updates the current selection. If sel is null, it clears the current selection. If sel wasn't previously selected, it's added to the list of selected objects, otherwise it's removed from the list.

protected UpdateSelection ( Selection sel, bool notify = true ) : void
sel	LongoMatch.Core.Store.Drawables.Selection	The selection.
notify	bool	If set to true, notifies about the changes.
return	void