/*******************************************************************************
* Copyright (c) 2004, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Chris Gross chris.gross@us.ibm.com Bug 107443
*******************************************************************************/
package org.eclipse.ui.internal;
import org.eclipse.jface.action.ContributionItem;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.util.Geometry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Sash;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.ui.ISizeProvider;
import org.eclipse.ui.IViewReference;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.internal.dnd.DragUtil;
import org.eclipse.ui.internal.presentations.PresentablePart;
import org.eclipse.ui.internal.presentations.SystemMenuFastView;
import org.eclipse.ui.internal.presentations.SystemMenuFastViewOrientation;
import org.eclipse.ui.internal.presentations.SystemMenuSizeFastView;
import org.eclipse.ui.internal.presentations.UpdatingActionContributionItem;
import org.eclipse.ui.presentations.AbstractPresentationFactory;
import org.eclipse.ui.presentations.IPresentablePart;
import org.eclipse.ui.presentations.IStackPresentationSite;
import org.eclipse.ui.presentations.StackPresentation;
/**
* Handles the presentation of an active fastview. A fast view pane docks to one side of a
* parent composite, and is capable of displaying a single view. The view may be resized.
* Displaying a new view will hide any view currently being displayed in the pane.
*
* Currently, the fast view pane does not own or contain the view. It only controls the view's
* position and visibility.
*
* @see org.eclipse.ui.internal.FastViewBar
*/
public class FastViewPane {
private int side = SWT.LEFT;
private PresentablePart currentPane;
private Composite clientComposite;
private static final int SASH_SIZE = 3;
private int minSize = 10;
private int size;
private Sash sash;
// Traverse listener -- listens to ESC and closes the active fastview
private Listener escapeListener = new Listener() {
public void handleEvent(Event event) {
if (event.character == SWT.ESC) {
if (currentPane != null) {
currentPane.getPane().getPage().hideFastView();
}
}
}
};
private DefaultStackPresentationSite site = new DefaultStackPresentationSite() {
/* (non-Javadoc)
* @see org.eclipse.ui.internal.skins.IPresentationSite#setState(int)
*/
public void setState(int newState) {
super.setState(newState);
PartPane pane = currentPane.getPane();
switch (newState) {
case IStackPresentationSite.STATE_MINIMIZED:
pane.getPage().hideFastView();
break;
case IStackPresentationSite.STATE_MAXIMIZED:
pane.setZoomed(true);
sash.setVisible(false);
this.getPresentation().setBounds(getBounds());
break;
case IStackPresentationSite.STATE_RESTORED:
pane.setZoomed(false);
sash.setVisible(true);
this.getPresentation().setBounds(getBounds());
break;
default:
}
}
public void flushLayout() {
}
public void close(IPresentablePart part) {
if (!isCloseable(part)) {
return;
}
IWorkbenchPartReference ref = currentPane.getPane().getPartReference();
if (ref instanceof IViewReference) {
currentPane.getPane().getPage().hideView((IViewReference)ref);
}
}
public void close(IPresentablePart[] parts) {
for (int idx = 0; idx < parts.length; idx++) {
close(parts[idx]);
}
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.skins.IPresentationSite#dragStart(org.eclipse.ui.internal.skins.IPresentablePart, boolean)
*/
public void dragStart(IPresentablePart beingDragged,
Point initialPosition, boolean keyboard) {
dragStart(initialPosition, keyboard);
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.skins.IPresentationSite#dragStart(boolean)
*/
public void dragStart(Point initialPosition, boolean keyboard) {
if (!isPartMoveable()) {
return;
}
PartPane pane = currentPane.getPane();
Control control = this.getPresentation().getControl();
Rectangle bounds = Geometry.toDisplay(clientComposite, control
.getBounds());
WorkbenchPage page = pane.getPage();
page.hideFastView();
if (page.isZoomed()) {
page.zoomOut();
}
DragUtil.performDrag(pane, bounds, initialPosition, !keyboard);
}
public IPresentablePart getSelectedPart() {
return currentPane;
}
public void addSystemActions(IMenuManager menuManager) {
ViewStackTrimToolBar vstt = getTrim();
appendToGroupIfPossible(menuManager,
"misc", new SystemMenuFastViewOrientation(currentPane.getPane(), vstt)); //$NON-NLS-1$
// Only add the 'Fast View' menu entry if the
// pane is showing a 'legacy' fast view
if (vstt == null) {
appendToGroupIfPossible(menuManager,
"misc", new UpdatingActionContributionItem(fastViewAction)); //$NON-NLS-1$
}
appendToGroupIfPossible(menuManager,
"size", new SystemMenuSizeFastView(FastViewPane.this)); //$NON-NLS-1$
}
/**
* Returns the ViewStackTrimToolBar which has caused the FV to be shown. If
* <code>null</code> then we can assume it was the legacy FastViewBar.
*/
private ViewStackTrimToolBar getTrim() {
if (currentPane == null || currentPane.getPane() == null)
return null;
ViewStackTrimToolBar trim = null;
PartPane pane = currentPane.getPane();
if (pane instanceof ViewPane) {
ViewPane vp = (ViewPane) pane;
Perspective persp = vp.getPage().getActivePerspective();
IViewReference viewRef = vp.getViewReference();
FastViewManager fvm = persp.getFastViewManager();
String trimId = null;
if (fvm != null)
trimId = fvm.getIdForRef(viewRef);
if (trimId != null && !trimId.equals(FastViewBar.FASTVIEWBAR_ID))
trim = fvm.getViewStackTrimToolbar(trimId);
}
return trim;
}
public boolean isPartMoveable(IPresentablePart toMove) {
return isPartMoveable();
}
public boolean isStackMoveable() {
// a fast view stack is moveable iff its part is moveable
return isPartMoveable();
}
private boolean isPartMoveable() {
if (currentPane == null) {
return false;
}
Perspective perspective = currentPane.getPane().getPage()
.getActivePerspective();
if (perspective == null) {
// Shouldn't happen -- can't have a FastViewPane without a perspective
return false;
}
IWorkbenchPartReference ref = currentPane.getPane().getPartReference();
if (ref instanceof IViewReference) {
return perspective.isMoveable((IViewReference)ref);
}
return true;
}
public boolean supportsState(int newState) {
if (currentPane == null) {
return false;
}
if (currentPane.getPane().getPage().isFixedLayout()) {
return false;
}
return true;
}
public IPresentablePart[] getPartList() {
return new IPresentablePart[] {getSelectedPart()};
}
/* (non-Javadoc)
* @see org.eclipse.ui.presentations.IStackPresentationSite#getProperty(java.lang.String)
*/
public String getProperty(String id) {
// fast views stacks do not get arbitrary user properties.
return null;
}
};
private SystemMenuFastView fastViewAction = new SystemMenuFastView(site);
private static void appendToGroupIfPossible(IMenuManager m, String groupId,
ContributionItem item) {
try {
m.appendToGroup(groupId, item);
} catch (IllegalArgumentException e) {
m.add(item);
}
}
private Listener mouseDownListener = new Listener() {
public void handleEvent(Event event) {
if (event.widget instanceof Control) {
Control control = (Control) event.widget;
if (control.getShell() != clientComposite.getShell()) {
return;
}
if (event.widget instanceof ToolBar) {
// Ignore mouse down on actual tool bar buttons
Point pt = new Point(event.x, event.y);
ToolBar toolBar = (ToolBar) event.widget;
if (toolBar.getItem(pt) != null) {
return;
}
}
Point loc = DragUtil.getEventLoc(event);
// 'Extrude' the rect -before- converting to Display coords
// to avoid Right-to-Left issues
Rectangle bounds = clientComposite.getBounds();
if (site.getState() != IStackPresentationSite.STATE_MAXIMIZED) {
bounds = Geometry.getExtrudedEdge(bounds, size + SASH_SIZE, side);
}
// Now map the bounds to display coords
bounds = clientComposite.getDisplay().map(clientComposite, null, bounds);
if (!bounds.contains(loc)) {
site.setState(IStackPresentationSite.STATE_MINIMIZED);
}
}
}
};
public void moveSash() {
final KeyListener listener = new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.character == SWT.ESC || e.character == '\r') {
currentPane.setFocus();
}
}
};
sash.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent e) {
sash.setBackground(sash.getDisplay().getSystemColor(
SWT.COLOR_LIST_SELECTION));
sash.addKeyListener(listener);
}
public void focusLost(FocusEvent e) {
sash.setBackground(null);
sash.removeKeyListener(listener);
}
});
sash.setFocus();
}
private Listener resizeListener = new Listener() {
public void handleEvent(Event event) {
if (event.type == SWT.Resize && currentPane != null) {
setSize(size);
}
}
};
private SelectionAdapter selectionListener = new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
if (currentPane != null) {
Rectangle bounds = clientComposite.getClientArea();
Point location = new Point(e.x, e.y);
int distanceFromEdge = Geometry.getDistanceFromEdge(bounds,
location, side);
if (!(side == SWT.TOP || side == SWT.LEFT)) {
distanceFromEdge -= SASH_SIZE;
}
setSize(distanceFromEdge);
if (e.detail != SWT.DRAG) {
updateFastViewSashBounds();
// getPresentation().getControl().moveAbove(null);
// currentPane.moveAbove(null);
// sash.moveAbove(null);
//currentPane.getControl().redraw();
sash.redraw();
}
}
}
};
private void setSize(int size) {
if (size < minSize) {
size = minSize;
}
this.size = size;
StackPresentation presentation = getPresentation();
if (presentation == null || presentation.getControl().isDisposed()) {
return;
}
getPresentation().setBounds(getBounds());
updateFastViewSashBounds();
}
/**
* Returns the current fastview size ratio. Returns 0.0 if there is no fastview visible.
*/
public float getCurrentRatio() {
if (currentPane == null) {
return 0.0f;
}
boolean isVertical = !Geometry.isHorizontal(side);
Rectangle clientArea = clientComposite.getClientArea();
int clientSize = Geometry.getDimension(clientArea, isVertical);
return (float) size / (float) clientSize;
}
private Rectangle getClientArea() {
return clientComposite.getClientArea();
}
private Rectangle getBounds() {
Rectangle bounds = getClientArea();
if (site.getState() == IStackPresentationSite.STATE_MAXIMIZED) {
return bounds;
}
boolean horizontal = Geometry.isHorizontal(side);
int available = Geometry.getDimension(bounds, !horizontal);
return Geometry.getExtrudedEdge(bounds, Math.min(
FastViewPane.this.size, available), side);
}
/**
* Displays the given view as a fastview. The view will be docked to the edge of the
* given composite until it is subsequently hidden by a call to hideFastView.
*
* @param newClientComposite
* @param pane
* @param newSide
*/
public void showView(Composite newClientComposite, ViewPane pane,
int newSide, float sizeRatio) {
side = newSide;
if (currentPane != null) {
hideView();
}
currentPane = new PresentablePart(pane, newClientComposite);
fastViewAction.setPane(currentPane);
clientComposite = newClientComposite;
clientComposite.addListener(SWT.Resize, resizeListener);
// Create the control first
Control ctrl = pane.getControl();
if (ctrl == null) {
pane.createControl(clientComposite);
ctrl = pane.getControl();
}
ctrl.addListener(SWT.Traverse, escapeListener);
// Temporarily use the same appearance as docked views .. eventually, fastviews will
// be independently pluggable.
AbstractPresentationFactory factory = ((WorkbenchWindow) pane
.getWorkbenchWindow()).getWindowConfigurer()
.getPresentationFactory();
StackPresentation presentation = factory.createViewPresentation(
newClientComposite, site);
site.setPresentation(presentation);
site.setPresentationState(IStackPresentationSite.STATE_RESTORED);
presentation.addPart(currentPane, null);
presentation.selectPart(currentPane);
presentation.setActive(StackPresentation.AS_ACTIVE_FOCUS);
presentation.setVisible(true);
boolean horizontalResize = Geometry.isHorizontal(side);
minSize = presentation.computePreferredSize(horizontalResize,
ISizeProvider.INFINITE,
Geometry.getDimension(getClientArea(), horizontalResize),
0);
// Show pane fast.
ctrl.setEnabled(true); // Add focus support.
Composite parent = ctrl.getParent();
boolean horizontal = Geometry.isHorizontal(side);
sash = new Sash(parent, Geometry
.getSwtHorizontalOrVerticalConstant(horizontal));
sash.addSelectionListener(selectionListener);
Rectangle clientArea = newClientComposite.getClientArea();
getPresentation().getControl().moveAbove(null);
currentPane.getPane().moveAbove(null);
sash.moveAbove(null);
setSize((int) (Geometry.getDimension(clientArea, !horizontal) * sizeRatio));
Display display = sash.getDisplay();
display.addFilter(SWT.MouseDown, mouseDownListener);
pane.setFocus();
}
/**
* Updates the position of the resize sash.
*/
private void updateFastViewSashBounds() {
Rectangle bounds = getBounds();
int oppositeSide = Geometry.getOppositeSide(side);
Rectangle newBounds = Geometry.getExtrudedEdge(bounds, -SASH_SIZE,
oppositeSide);
Rectangle oldBounds = sash.getBounds();
if (!newBounds.equals(oldBounds)) {
sash.setBounds(newBounds);
}
}
/**
* Disposes of any active widgetry being used for the fast view pane. Does not dispose
* of the view itself.
*/
public void dispose() {
hideView();
}
private StackPresentation getPresentation() {
return site.getPresentation();
}
/**
* Hides the sash for the fastview if it is currently visible. This method may not be
* required anymore, and might be removed from the public interface.
*/
public void hideFastViewSash() {
if (sash != null) {
sash.setVisible(false);
}
}
/**
* Hides the currently visible fastview.
*/
public void hideView() {
if (clientComposite != null) {
Display display = clientComposite.getDisplay();
display.removeFilter(SWT.MouseDown, mouseDownListener);
}
if (currentPane == null) {
return;
}
fastViewAction.setPane(null);
//unzoom before hiding
currentPane.getPane().setZoomed(false);
if (sash != null) {
sash.dispose();
sash = null;
}
clientComposite.removeListener(SWT.Resize, resizeListener);
// Get pane.
// Hide the right side sash first
//hideFastViewSash();
Control ctrl = currentPane.getControl();
ctrl.removeListener(SWT.Traverse, escapeListener);
// Hide it completely.
getPresentation().setVisible(false);
site.dispose();
//currentPane.setFastViewSash(null);
ctrl.setEnabled(false); // Remove focus support.
currentPane.dispose();
currentPane = null;
}
/**
* @return Returns the currently visible fastview or null if none
*/
public ViewPane getCurrentPane() {
if (currentPane != null && currentPane.getPane() instanceof ViewPane) {
return (ViewPane)currentPane.getPane();
}
return null;
}
public void setState(int newState) {
site.setState(newState);
}
public int getState() {
return site.getState();
}
/**
*
*/
public void showSystemMenu() {
getPresentation().showSystemMenu();
}
/**
*
*/
public void showPaneMenu() {
getPresentation().showPaneMenu();
}
}