diff options
Diffstat (limited to 'toolkit/test/accessibility/Canvas.java')
| -rwxr-xr-x | toolkit/test/accessibility/Canvas.java | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/toolkit/test/accessibility/Canvas.java b/toolkit/test/accessibility/Canvas.java new file mode 100755 index 000000000000..a1d8fb0f7d08 --- /dev/null +++ b/toolkit/test/accessibility/Canvas.java @@ -0,0 +1,448 @@ +import java.util.*; +import java.awt.*; +import java.awt.event.*; +import javax.swing.*; +import javax.swing.tree.*; +import javax.swing.event.TreeSelectionListener; +import javax.swing.event.TreeSelectionEvent; +import java.awt.geom.Rectangle2D; + +import com.sun.star.accessibility.XAccessible; +import com.sun.star.accessibility.XAccessibleContext; +import com.sun.star.accessibility.XAccessibleComponent; + +/** This canvas displays accessible objects graphically. Each accessible + object with graphical representation is represented by an + CanvasShape object and has to be added by the + <member>addAccessible</member> member function. + + <p>The canvas listens to selection events of the associated JTree and + highlights the first selected node of that tree.</p> +*/ +class Canvas + extends JPanel + implements MouseListener, MouseMotionListener, TreeSelectionListener//, Scrollable +{ + // This constant can be passed to SetZoomMode to always show the whole screen. + public static final int WHOLE_SCREEN = -1; + + public Canvas () + { + super (true); + maObjects = new java.util.HashMap (); + maNodes = new Vector (); + maObjectList = new Vector (); + maContexts = new Vector (); + addMouseListener (this); + addMouseMotionListener (this); + maBoundingBox = new Rectangle (0,0,100,100); + maTree = null; + mnHOffset = 0; + mnVOffset = 0; + mnScale = 1; + setShowText(false); + setShowDescriptions (true); + setShowNames (true); + setAntialiasing (true); + maLastWidgetSize = new Dimension (0,0); + } + + /** Tell the canvas which tree view to use to highlight accessible + objects. + */ + public void setTree (JTree aTree) + { + if (maTree != null) + maTree.removeTreeSelectionListener (this); + maTree = aTree; + if (maTree != null) + maTree.addTreeSelectionListener (this); + } + + + + + public void addNode (AccTreeNode aNode) + { + if (maNodes.indexOf (aNode) == -1) + { + maNodes.add (aNode); + + CanvasShape aObject = (CanvasShape) maObjects.get (aNode); + if (aObject == null) + { + aObject = new CanvasShape (aNode); + // Update bounding box that includes all objects. + if (maObjects.size() == 0) + maBoundingBox = aObject.getBBox(); + else + maBoundingBox = maBoundingBox.union (aObject.getBBox()); + + maObjects.put (aNode, aObject); + maObjectList.add (aObject); + + } + repaint (); + } + } + + public void removeNode (AccTreeNode aNode) + { + int i = maNodes.indexOf (aNode); + if( i != -1 ) + { + Object aObject = maObjects.get(aNode); + maObjectList.remove (aObject); + maObjects.remove (aObject); + maNodes.remove (aNode); + repaint (); + } + } + + public void updateNode (AccTreeNode aNode) + { + int i = maNodes.indexOf (aNode); + if (i != -1) + { + CanvasShape aObject = (CanvasShape)maObjects.get(aNode); + if (aObject != null) + aObject.update(); + } + } + + public void updateNodeGeometry (AccTreeNode aNode) + { + CanvasShape aObject = (CanvasShape)maObjects.get(aNode); + if (aObject != null) + aObject.updateGeometry(); + } + + public void clear () + { + while (maNodes.size() > 0) + removeNode ((AccTreeNode)maNodes.elementAt(0)); + + maNodes.clear(); + maObjects.clear(); + maObjectList.clear(); + } + + public boolean getShowDescriptions () + { + return Options.GetBoolean ("ShowDescriptions"); + } + + public void setShowDescriptions (boolean bNewValue) + { + Options.SetBoolean ("ShowDescriptions", bNewValue); + repaint (); + } + + public boolean getShowNames () + { + return Options.GetBoolean ("ShowNames"); + } + + public void setShowNames (boolean bNewValue) + { + Options.SetBoolean ("ShowNames", bNewValue); + repaint (); + } + + public boolean getAntialiasing () + { + return Options.GetBoolean ("Antialiasing"); + } + + public void setAntialiasing (boolean bNewValue) + { + Options.SetBoolean ("Antialiasing", bNewValue); + repaint (); + } + + public boolean getShowText () + { + return Options.GetBoolean ("ShowText"); + } + + public void setShowText (boolean bNewValue) + { + Options.SetBoolean ("ShowText", bNewValue); + repaint (); + } + + public void setZoomMode (int nZoomMode) + { + Options.SetInteger ("ZoomMode", nZoomMode); + repaint (); + } + + public int getZoomMode () + { + return Options.GetInteger ("ZoomMode", WHOLE_SCREEN); + } + + + public void paintComponent (Graphics g) + { + synchronized (g) + { + super.paintComponent (g); + + Graphics2D g2 = (Graphics2D)g; + if (getAntialiasing()) + g2.setRenderingHint (RenderingHints.KEY_ANTIALIASING, + RenderingHints.VALUE_ANTIALIAS_ON); + else + g2.setRenderingHint (RenderingHints.KEY_ANTIALIASING, + RenderingHints.VALUE_ANTIALIAS_OFF); + + setupTransformation (); + + // Draw the screen representation to give a hint of the location of the + // accessible object on the screen. + Dimension aScreenSize = Toolkit.getDefaultToolkit().getScreenSize(); + Rectangle2D.Double aScreen = new Rectangle2D.Double ( + mnHOffset, + mnVOffset, + mnScale*aScreenSize.getWidth(), + mnScale*aScreenSize.getHeight()); + // Fill the screen rectangle and draw a frame arround it to increase its visibility. + g2.setColor (new Color (250,240,230)); + g2.fill (aScreen); + g2.setColor (Color.BLACK); + g2.draw (aScreen); + + synchronized (maObjectList) + { + int nCount = maObjectList.size(); + boolean bShowDescriptions = getShowDescriptions(); + boolean bShowNames = getShowNames(); + boolean bShowText = getShowText(); + for (int i=0; i<nCount; i++) + { + CanvasShape aCanvasShape = (CanvasShape)maObjectList.elementAt(i); + aCanvasShape.paint ( + g2, + mnHOffset, mnVOffset, mnScale, + bShowDescriptions, bShowNames, bShowText); + } + } + + // Paint highlighted frame around active object as the last thing. + if (maActiveObject != null) + maActiveObject.paint_highlight ( + g2, + mnHOffset, mnVOffset, mnScale); + } + } + + + + + /** Set up the transformation so that the graphical display can show a + centered representation of the whole screen. + */ + private void setupTransformation () + { + // Turn off scrollbars when showing the whole screen. Otherwise show them when needed. + JViewport aViewport = (JViewport)getParent(); + JScrollPane aScrollPane = (JScrollPane)aViewport.getParent(); + int nZoomMode = getZoomMode(); + if (nZoomMode == WHOLE_SCREEN) + { + if (aScrollPane.getHorizontalScrollBarPolicy() + != JScrollPane.HORIZONTAL_SCROLLBAR_NEVER) + aScrollPane.setHorizontalScrollBarPolicy (JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); + if (aScrollPane.getVerticalScrollBarPolicy() + != JScrollPane.VERTICAL_SCROLLBAR_NEVER) + aScrollPane.setVerticalScrollBarPolicy (JScrollPane.VERTICAL_SCROLLBAR_NEVER); + } + else + { + if (aScrollPane.getHorizontalScrollBarPolicy() + != JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED) + aScrollPane.setHorizontalScrollBarPolicy (JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED); + if (aScrollPane.getVerticalScrollBarPolicy() + != JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED) + aScrollPane.setVerticalScrollBarPolicy (JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED); + } + + Dimension aScreenSize = Toolkit.getDefaultToolkit().getScreenSize(); + Dimension aWidgetSize = aViewport.getSize(); + { + if ((aScreenSize.getWidth() > 0) && (aScreenSize.getHeight() > 0)) + { + if (nZoomMode == WHOLE_SCREEN) + { + // Calculate the scales that would map the screen onto the + // widget in both of the coordinate axes and select the + // smaller + // of the two: it maps the screen onto the widget in both + // axes at the same time. + double nHScale = (aWidgetSize.getWidth() - 10) / aScreenSize.getWidth(); + double nVScale = (aWidgetSize.getHeight() - 10) / aScreenSize.getHeight(); + if (nHScale < nVScale) + mnScale = nHScale; + else + mnScale = nVScale; + } + else + { + mnScale = nZoomMode / 100.0; + } + + // Calculate offsets that center the scaled screen inside the widget. + mnHOffset = (aWidgetSize.getWidth() - mnScale*aScreenSize.getWidth()) / 2.0; + mnVOffset = (aWidgetSize.getHeight() - mnScale*aScreenSize.getHeight()) / 2.0; + if (mnHOffset < 0) + mnHOffset = 0; + if (mnVOffset < 0) + mnVOffset = 0; + + setPreferredSize (new Dimension ( + (int)(2*mnHOffset + mnScale * aScreenSize.getWidth()), + (int)(2*mnVOffset + mnScale * aScreenSize.getHeight()))); + revalidate (); + } + else + { + // In case of a degenerate (not yet initialized?) screen size + // use some meaningless default values. + mnScale = 1; + mnHOffset = 0; + mnVOffset = 0; + } + } + maLastWidgetSize = aWidgetSize; + } + + + + /** Call getAccessibleAt to determine accessible object under mouse. + */ + public void mouseClicked (MouseEvent e) + { + } + + public void mousePressed (MouseEvent e) + { + CanvasShape aObjectUnderMouse = FindCanvasShapeUnderMouse (e); + highlightObject (aObjectUnderMouse); + if ((e.getModifiers() & InputEvent.CTRL_MASK) != 0) + { + maTree.expandPath (aObjectUnderMouse.getPath()); + } + } + + public void mouseReleased (MouseEvent e) + { + } + + public void mouseEntered (MouseEvent e) + { + } + + public void mouseExited (MouseEvent e) + { + // Deselect currently active object. + if (maActiveObject != null) + { + maActiveObject.unhighlight (); + maActiveObject = null; + repaint (); + } + } + + public void mouseDragged (MouseEvent e) + { + } + + public void mouseMoved (MouseEvent e) + { + if ((e.getModifiers() & InputEvent.SHIFT_MASK) != 0) + highlightObject (FindCanvasShapeUnderMouse (e)); + } + + protected CanvasShape FindCanvasShapeUnderMouse (MouseEvent e) + { + int nObjects = maObjects.size(); + CanvasShape aObjectUnderMouse = null; + int nCount = maObjectList.size(); + for (int i=nCount-1; i>=0; --i) + { + CanvasShape aObject = (CanvasShape)maObjectList.elementAt(i); + if (aObject != null) + if (aObject.contains (e.getX(),e.getY())) + { + aObjectUnderMouse = aObject; + break; + } + } + return aObjectUnderMouse; + } + + protected boolean highlightObject (CanvasShape aNewActiveObject) + { + if (aNewActiveObject != maActiveObject) + { + if (maActiveObject != null) + maActiveObject.unhighlight(); + + maActiveObject = aNewActiveObject; + if (maActiveObject != null) + { + if (maTree != null) + { + maTree.scrollPathToVisible (maActiveObject.getPath()); + maTree.setSelectionPath (maActiveObject.getPath()); + maTree.repaint (); + } + maActiveObject.highlight (); + repaint (); + } + return true; + } + else + return false; + } + + /** Called when the selection of the tree changes. Highlight the + corresponding graphical representation of the first selected object. + */ + public void valueChanged (javax.swing.event.TreeSelectionEvent event) + { + TreePath aPath = event.getPath(); + Object aObject = aPath.getLastPathComponent(); + if (aObject instanceof AccTreeNode) + { + CanvasShape aCanvasShape = (CanvasShape)maObjects.get ((AccTreeNode)aObject); + if (highlightObject (aCanvasShape)) + repaint(); + } + } + + private int + mnXAnchor, + mnYAnchor, + maResizeFlag; + private double + mnHOffset, + mnVOffset, + mnScale; + private CanvasShape + maActiveObject; + private java.util.HashMap + maObjects; + private Vector + maObjectList, + maContexts, + maNodes; + private Rectangle + maBoundingBox; + private JTree + maTree; + // The size of the widget at the last call of setupTransformation() + private Dimension + maLastWidgetSize; +} |