sk.uniba.euromath.editor.xmlEditor.tools
Class XMLStructureDragTracker

java.lang.Object
  org.eclipse.gef.util.FlagSupport
      org.eclipse.gef.tools.AbstractTool
          org.eclipse.gef.tools.TargetingTool
              sk.uniba.euromath.editor.xmlEditor.tools.XMLStructureDragTracker

All Implemented Interfaces:

org.eclipse.gef.DragTracker, org.eclipse.gef.RequestConstants, org.eclipse.gef.Tool

Direct Known Subclasses:

TextDragTracker

public class XMLStructureDragTracker
extends org.eclipse.gef.tools.TargetingTool
implements org.eclipse.gef.DragTracker

Drag tracker handling drags interpreting them as selections. Local selection is created translating start-point end-point to DOMPointers making DOMInterval. Depending on input is local selection combined with viewer's selection.
Start(end) point translation is always to DOMPinters pointing between nodes, not into.

Author:

Martin Kollar 23.09.2005

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.gef.tools.AbstractTool

org.eclipse.gef.tools.AbstractTool.Input

Field Summary

Fields inherited from class org.eclipse.gef.tools.TargetingTool

MAX_FLAG

Fields inherited from class org.eclipse.gef.tools.AbstractTool

MAX_STATE, MOUSE_BUTTON_ANY, MOUSE_BUTTON1, MOUSE_BUTTON2, MOUSE_BUTTON3, PROPERTY_UNLOAD_WHEN_FINISHED, STATE_ACCESSIBLE_DRAG, STATE_ACCESSIBLE_DRAG_IN_PROGRESS, STATE_DRAG, STATE_DRAG_IN_PROGRESS, STATE_INITIAL, STATE_INVALID, STATE_TERMINAL

Fields inherited from interface org.eclipse.gef.RequestConstants

REQ_ADD, REQ_ALIGN, REQ_ALIGN_CHILDREN, REQ_CLONE, REQ_CONNECTION_END, REQ_CONNECTION_START, REQ_CREATE, REQ_CREATE_BENDPOINT, REQ_DELETE, REQ_DELETE_DEPENDANT, REQ_DIRECT_EDIT, REQ_MOVE, REQ_MOVE_BENDPOINT, REQ_MOVE_CHILDREN, REQ_OPEN, REQ_ORPHAN, REQ_ORPHAN_CHILDREN, REQ_RECONNECT_SOURCE, REQ_RECONNECT_TARGET, REQ_RESIZE, REQ_RESIZE_CHILDREN, REQ_SELECTION, REQ_SELECTION_HOVER

Constructor Summary

XMLStructureDragTracker(IXMLEditPart sourceEditPart)
Constructs new XMLDragTracker with the given XMLEditPart

Method Summary

protected DOMIntervalSet	computeGlobalSelection() Computes actual selection to set to viewer.
protected DOMIntervalSet	computeLocalSelection() Computes local selection corresponding to drag.
protected boolean	evaluate(org.eclipse.gef.EditPart editpart) Test editpart, if is acceptable as end point of selection under mouse.
protected void	finishDrag() Is called at termination of drag to perfom and finish selection and drag related tasks.
protected String	getCommandName()
protected org.eclipse.gef.EditPart	getSourceEditPart()
protected XMLAccess	getXMLAccess()
protected IXMLGraphicalViewer	getXMLGraphicalViewer()
protected boolean	handleButtonDown(int button)
protected boolean	handleButtonUp(int button) If in the drag state, the tool selects the source edit part.
protected boolean	handleDrag()
protected boolean	handleDragInProgress()
protected boolean	handleDragStarted()
protected boolean	handleEnteredEditPart()
protected boolean	handleExitingEditPart()
protected boolean	handleKeyDown(KeyEvent e)
protected boolean	handleKeyUp(KeyEvent e)
void	setViewer(org.eclipse.gef.EditPartViewer viewer) Retreives selection from viewer, before drag started.
protected boolean	updateTargetUnderMouse() Simpler implementation than super, as target is directly taken editpart at mouse cursor location, which must be XMLEditPart with not null element id.

Methods inherited from class org.eclipse.gef.tools.TargetingTool

createTargetRequest, deactivate, doAutoexpose, eraseTargetFeedback, getCommand, getExclusionSet, getTargetEditPart, getTargetingConditional, getTargetRequest, handleAutoexpose, handleHoverStop, handleInvalidInput, handleLeavingEditPart, handleViewerExited, isShowingTargetFeedback, isTargetLocked, lockTargetEditPart, resetFlags, setAutoexposeHelper, setTargetEditPart, setTargetRequest, showTargetFeedback, unlockTargetEditPart, updateAutoexposeHelper, updateTargetRequest

Methods inherited from class org.eclipse.gef.tools.AbstractTool

activate, addFeedback, applyProperty, calculateCursor, commitDrag, createOperationSet, debug, executeCommand, executeCurrentCommand, focusGained, focusLost, getCurrentCommand, getCurrentInput, getCurrentViewer, getDebugName, getDebugNameForState, getDefaultCursor, getDisabledCursor, getDomain, getDragMoveDelta, getLocation, getOperationSet, getStartLocation, getState, handleCommandStackChanged, handleDoubleClick, handleFinished, handleFocusGained, handleFocusLost, handleHover, handleKeyTraversed, handleMove, handleNativeDragFinished, handleNativeDragStarted, handleViewerEntered, isActive, isHoverActive, isInState, isViewerImportant, keyDown, keyTraversed, keyUp, mouseDoubleClick, mouseDown, mouseDrag, mouseHover, mouseMove, mouseUp, mouseWheelScrolled, movedPastThreshold, nativeDragFinished, nativeDragStarted, performViewerMouseWheel, reactivate, refreshCursor, releaseToolCapture, removeFeedback, setCurrentCommand, setCursor, setDefaultCursor, setDisabledCursor, setEditDomain, setHoverActive, setProperties, setStartLocation, setState, setToolCapture, setUnloadWhenFinished, stateTransition, unloadWhenFinished, viewerEntered, viewerExited

Methods inherited from class org.eclipse.gef.util.FlagSupport

getFlag, setFlag

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.gef.DragTracker

commitDrag

Methods inherited from interface org.eclipse.gef.Tool

activate, deactivate, focusGained, focusLost, keyDown, keyTraversed, keyUp, mouseDoubleClick, mouseDown, mouseDrag, mouseHover, mouseMove, mouseUp, mouseWheelScrolled, nativeDragFinished, nativeDragStarted, setEditDomain, setProperties, viewerEntered, viewerExited

Constructor Detail

XMLStructureDragTracker

public XMLStructureDragTracker(IXMLEditPart sourceEditPart)

Constructs new XMLDragTracker with the given XMLEditPart

Parameters:

sourceEditPart - source editPart where selection starts

Method Detail

setViewer

public void setViewer(org.eclipse.gef.EditPartViewer viewer)

Retreives selection from viewer, before drag started.

Specified by:

setViewer in interface org.eclipse.gef.Tool

Overrides:

setViewer in class org.eclipse.gef.tools.AbstractTool

handleDragStarted

protected boolean handleDragStarted()

Overrides:

handleDragStarted in class org.eclipse.gef.tools.AbstractTool

handleDrag

protected boolean handleDrag()

Overrides:

handleDrag in class org.eclipse.gef.tools.AbstractTool

handleDragInProgress

protected boolean handleDragInProgress()

Overrides:

handleDragInProgress in class org.eclipse.gef.tools.AbstractTool

handleExitingEditPart

protected boolean handleExitingEditPart()

Overrides:

handleExitingEditPart in class org.eclipse.gef.tools.TargetingTool

handleEnteredEditPart

protected boolean handleEnteredEditPart()

Overrides:

handleEnteredEditPart in class org.eclipse.gef.tools.TargetingTool

handleButtonDown

protected boolean handleButtonDown(int button)

Overrides:

handleButtonDown in class org.eclipse.gef.tools.AbstractTool

computeLocalSelection

protected DOMIntervalSet computeLocalSelection()

Computes local selection corresponding to drag.

Returns:

selection made by this drag

handleButtonUp

protected boolean handleButtonUp(int button)

If in the drag state, the tool selects the source edit part. If the edit part was already selected, #performDirectEdit() is called. If the edit part is newly selected and not completely visible, EditPartViewer.reveal(EditPart) is called to show the selected edit part.

Overrides:

handleButtonUp in class org.eclipse.gef.tools.AbstractTool

See Also:

AbstractTool.handleButtonUp(int)

computeGlobalSelection

protected DOMIntervalSet computeGlobalSelection()

Computes actual selection to set to viewer. Pressed ctrl and shift keys influence how selection is computed. The user needs 3 styles of selecting: simple interval (nothing pressed), union interval with current selection(shift pressed) and xor interval with current selection(ctrl pressed).

Returns:

global selection uctual to current state of drag, returned by copy

getXMLAccess

protected XMLAccess getXMLAccess()

getXMLGraphicalViewer

protected IXMLGraphicalViewer getXMLGraphicalViewer()

getCommandName

protected String getCommandName()

Specified by:

getCommandName in class org.eclipse.gef.tools.AbstractTool

getSourceEditPart

protected org.eclipse.gef.EditPart getSourceEditPart()

updateTargetUnderMouse

protected boolean updateTargetUnderMouse()

Simpler implementation than super, as target is directly taken editpart at mouse cursor location, which must be XMLEditPart with not null element id. In case when drag started at location where editpart hasn't id (source edit part hasn't id), source editpart is set to target, if not yet.

Overrides:

updateTargetUnderMouse in class org.eclipse.gef.tools.TargetingTool

evaluate

protected boolean evaluate(org.eclipse.gef.EditPart editpart)

Test editpart, if is acceptable as end point of selection under mouse.

Parameters:

editpart - to test for potential target - end point of selection

Returns:

true if is suitable for end point of selection

finishDrag

protected void finishDrag()

Is called at termination of drag to perfom and finish selection and drag related tasks.

handleKeyDown

protected boolean handleKeyDown(KeyEvent e)

Overrides:

handleKeyDown in class org.eclipse.gef.tools.AbstractTool

handleKeyUp

protected boolean handleKeyUp(KeyEvent e)

Overrides:

handleKeyUp in class org.eclipse.gef.tools.AbstractTool