1 files changed, 224 insertions, 0 deletions
diff --git a/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/presentation/ButtonPropertyEditorPresentationImpl.java b/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/presentation/ButtonPropertyEditorPresentationImpl.java
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index 0000000..209bf39
--- /dev/null
+++ b/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/presentation/ButtonPropertyEditorPresentationImpl.java
@@ -0,0 +1,224 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Google, Inc.
+ * 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:
+ *    Google, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.wb.internal.core.model.property.editor.presentation;
+
+import com.google.common.collect.Maps;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.wb.internal.core.model.property.Property;
+import org.eclipse.wb.internal.core.model.property.table.PropertyTable;
+import org.eclipse.wb.internal.core.utils.Pair;
+
+import java.util.Map;
+
+/**
+ * Internal implementation of {@link PropertyEditorPresentation} for displaying {@link Button}.
+ *
+ * @author scheglov_ke
+ * @author mitin_aa
+ * @coverage core.model.property.editor
+ */
+class ButtonPropertyEditorPresentationImpl extends PropertyEditorPresentation {
+  protected final PropertyToControlMap m_propertyToControl = new PropertyToControlMap();
+  private final ButtonPropertyEditorPresentation m_presentation;
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // Constructor
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  public ButtonPropertyEditorPresentationImpl(ButtonPropertyEditorPresentation presentation) {
+    m_presentation = presentation;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // PropertyEditorPresentation
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  @Override
+  public final void hide(PropertyTable propertyTable, Property property) {
+    Control control = m_propertyToControl.remove(propertyTable, property);
+    if (control != null) {
+      control.dispose();
+    }
+  }
+
+  @Override
+  public final int show(PropertyTable propertyTable,
+      Property property,
+      int x,
+      int y,
+      int width,
+      int height) {
+    // prepare control
+    Control control = m_propertyToControl.get(propertyTable, property);
+    if (control == null) {
+      control = createControl(propertyTable, property);
+    }
+    // set bounds
+    final int controlWidth = height;
+    final int controlX = x + width - controlWidth;
+    setBounds(control, controlX, y, controlWidth, height);
+    return controlWidth;
+  }
+
+  /**
+   * Finds and select the appropriate {@link Control} belonging to given property.
+   */
+  public void setSelection(PropertyTable propertyTable, Property property, boolean selected) {
+    Button button = (Button) m_propertyToControl.get(propertyTable, property);
+    if (button != null) {
+      button.setSelection(selected);
+    }
+  }
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // Control
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  /**
+   * Creates the control for given property and initializes newly created control.
+   */
+  private Control createControl(final PropertyTable propertyTable, final Property property) {
+    Control control = createControlImpl(propertyTable, property);
+    m_propertyToControl.put(propertyTable, property, control);
+    // when Control disposed, remove Control/Property from map to avoid memory leak
+    control.addListener(SWT.Dispose, new Listener() {
+      @Override
+    public void handleEvent(Event e) {
+        m_propertyToControl.remove(propertyTable, property);
+      }
+    });
+    // activate property on mouse down
+    control.addListener(SWT.MouseDown, new Listener() {
+      @Override
+    public void handleEvent(Event event) {
+        propertyTable.deactivateEditor(true);
+        propertyTable.setActiveProperty(property);
+      }
+    });
+    // return focus on propertyTable after click
+    control.addListener(SWT.MouseUp, new Listener() {
+      @Override
+    public void handleEvent(Event event) {
+        propertyTable.forceFocus();
+      }
+    });
+    // handle selection
+    control.addListener(SWT.Selection, new Listener() {
+      @Override
+    public void handleEvent(Event event) {
+        try {
+          getPresentation().onClick(propertyTable, property);
+        } catch (Throwable e) {
+          propertyTable.deactivateEditor(false);
+          propertyTable.handleException(e);
+        }
+      }
+    });
+    return control;
+  }
+
+  /**
+   * Creates the {@link Control} instance. By default, {@link Button} instance created.
+   */
+  protected Control createControlImpl(final PropertyTable propertyTable, final Property property) {
+    Button button = new Button(propertyTable, getPresentation().getStyle());
+    button.setImage(getPresentation().getImage());
+    button.setToolTipText(getPresentation().getTooltip());
+    return button;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // Access
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  /**
+   * @return the 'parent' presentation. Internal usage only.
+   */
+  protected final ButtonPropertyEditorPresentation getPresentation() {
+    return m_presentation;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // Utils
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  /**
+   * Sets new bounds for {@link Control}, optimizing when possible.
+   */
+  private static void setBounds(Control control, int newX, int newY, int newWidth, int newHeight) {
+    // check, may be Control is invisible, so no reason to change bounds
+    {
+      // is in negative zone
+      if (newY + newHeight < 0) {
+        control.setVisible(false);
+        return;
+      }
+      // is out of client area height
+      Rectangle parentArea = control.getParent().getClientArea();
+      if (newY > parentArea.height) {
+        control.setVisible(false);
+        return;
+      }
+    }
+    // well, now we sure that Control is visible
+    if (!control.getVisible()) {
+      control.setVisible(true);
+    }
+    // prepare old size, remember new
+    Integer oldWidthObject = (Integer) control.getData("oldWidth");
+    Integer oldHeightObject = (Integer) control.getData("oldHeight");
+    control.setData("oldWidth", newWidth);
+    control.setData("oldHeight", newHeight);
+    // check, may be same size
+    if (oldWidthObject != null) {
+      int oldWidth = oldWidthObject.intValue();
+      int oldHeight = oldHeightObject.intValue();
+      if (oldWidth == newWidth && oldHeight == newHeight) {
+        control.setLocation(newX, newY);
+        return;
+      }
+    }
+    // no any optimization possible, just set bounds
+    control.setBounds(newX, newY, newWidth, newHeight);
+  }
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // Controls map
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  protected static final class PropertyToControlMap {
+    private final Map<Pair<PropertyTable, Property>, Control> m_map = Maps.newHashMap();
+
+    void put(PropertyTable propertyTable, Property property, Control control) {
+      m_map.put(Pair.create(propertyTable, property), control);
+    }
+
+    Control remove(PropertyTable propertyTable, Property property) {
+      return m_map.remove(Pair.create(propertyTable, property));
+    }
+
+    Control get(PropertyTable propertyTable, Property property) {
+      return m_map.get(Pair.create(propertyTable, property));
+    }
+  }
+}