| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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 |
| *******************************************************************************/ |
| package org.eclipse.jface.preference; |
| |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Font; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| |
| /** |
| * A field editor for a color type preference. |
| */ |
| public class ColorFieldEditor extends FieldEditor { |
| |
| /** |
| * The color selector, or <code>null</code> if none. |
| */ |
| private ColorSelector colorSelector; |
| |
| /** |
| * Creates a new color field editor |
| */ |
| protected ColorFieldEditor() { |
| //No default behavior |
| } |
| |
| /** |
| * Creates a color field editor. |
| * |
| * @param name |
| * the name of the preference this field editor works on |
| * @param labelText |
| * the label text of the field editor |
| * @param parent |
| * the parent of the field editor's control |
| */ |
| public ColorFieldEditor(String name, String labelText, Composite parent) { |
| super(name, labelText, parent); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on FieldEditor. |
| */ |
| protected void adjustForNumColumns(int numColumns) { |
| ((GridData) colorSelector.getButton().getLayoutData()).horizontalSpan = numColumns - 1; |
| } |
| |
| /** |
| * Computes the size of the color image displayed on the button. |
| * <p> |
| * This is an internal method and should not be called by clients. |
| * </p> |
| * |
| * @param window |
| * the window to create a GC on for calculation. |
| * @return Point The image size |
| * |
| */ |
| protected Point computeImageSize(Control window) { |
| // Make the image height as high as a corresponding character. This |
| // makes sure that the button has the same size as a "normal" text |
| // button. |
| GC gc = new GC(window); |
| Font f = JFaceResources.getFontRegistry().get( |
| JFaceResources.DEFAULT_FONT); |
| gc.setFont(f); |
| int height = gc.getFontMetrics().getHeight(); |
| gc.dispose(); |
| Point p = new Point(height * 3 - 6, height); |
| return p; |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on FieldEditor. |
| */ |
| protected void doFillIntoGrid(Composite parent, int numColumns) { |
| Control control = getLabelControl(parent); |
| GridData gd = new GridData(); |
| gd.horizontalSpan = numColumns - 1; |
| control.setLayoutData(gd); |
| |
| Button colorButton = getChangeControl(parent); |
| gd = new GridData(); |
| int widthHint = convertHorizontalDLUsToPixels(colorButton, |
| IDialogConstants.BUTTON_WIDTH); |
| gd.widthHint = Math.max(widthHint, colorButton.computeSize(SWT.DEFAULT, |
| SWT.DEFAULT, true).x); |
| colorButton.setLayoutData(gd); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on FieldEditor. |
| */ |
| protected void doLoad() { |
| if (colorSelector == null) |
| return; |
| colorSelector.setColorValue(PreferenceConverter.getColor( |
| getPreferenceStore(), getPreferenceName())); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on FieldEditor. |
| */ |
| protected void doLoadDefault() { |
| if (colorSelector == null) |
| return; |
| colorSelector.setColorValue(PreferenceConverter.getDefaultColor( |
| getPreferenceStore(), getPreferenceName())); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on FieldEditor. |
| */ |
| protected void doStore() { |
| PreferenceConverter.setValue(getPreferenceStore(), getPreferenceName(), |
| colorSelector.getColorValue()); |
| } |
| |
| /** |
| * Get the color selector used by the receiver. |
| * |
| * @return ColorSelector/ |
| */ |
| public ColorSelector getColorSelector() { |
| return colorSelector; |
| } |
| |
| /** |
| * Returns the change button for this field editor. |
| * |
| * @param parent |
| * The control to create the button in if required. |
| * @return the change button |
| */ |
| protected Button getChangeControl(Composite parent) { |
| if (colorSelector == null) { |
| colorSelector = new ColorSelector(parent); |
| colorSelector.addListener(new IPropertyChangeListener() { |
| // forward the property change of the color selector |
| public void propertyChange(PropertyChangeEvent event) { |
| ColorFieldEditor.this.fireValueChanged(event.getProperty(), |
| event.getOldValue(), event.getNewValue()); |
| setPresentsDefaultValue(false); |
| } |
| }); |
| |
| } else { |
| checkParent(colorSelector.getButton(), parent); |
| } |
| return colorSelector.getButton(); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on FieldEditor. |
| */ |
| public int getNumberOfControls() { |
| return 2; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.preference.FieldEditor#setEnabled(boolean, |
| * org.eclipse.swt.widgets.Composite) |
| */ |
| public void setEnabled(boolean enabled, Composite parent) { |
| super.setEnabled(enabled, parent); |
| getChangeControl(parent).setEnabled(enabled); |
| } |
| |
| } |