net.sourceforge.phpeclipse.phphelp/src/net/sourceforge/phpdt/httpquery/preferences/SWTUtil.java

   1 /**********************************************************************
   2  * Copyright (c) 2003 IBM Corporation and others.
   3  * All rights reserved. � This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  �*
   8  * Contributors:
   9  *    IBM - Initial API and implementation
  10  **********************************************************************/
  11 package net.sourceforge.phpdt.httpquery.preferences;
  12
  13 import org.eclipse.jface.dialogs.Dialog;
  14 import org.eclipse.jface.dialogs.IDialogConstants;
  15 import org.eclipse.jface.resource.JFaceResources;
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.graphics.FontMetrics;
  18 import org.eclipse.swt.graphics.GC;
  19 import org.eclipse.swt.layout.GridData;
  20 import org.eclipse.swt.layout.GridLayout;
  21 import org.eclipse.swt.widgets.Button;
  22 import org.eclipse.swt.widgets.Composite;
  23 import org.eclipse.swt.widgets.Control;
  24 import org.eclipse.swt.widgets.Label;
  25
  26 /**
  27  * SWT Utility class.
  28  */
  29 public class SWTUtil {
  30         private static FontMetrics fontMetrics;
  31
  32         protected static void initializeDialogUnits(Control testControl) {
  33                 // Compute and store a font metric
  34                 GC gc = new GC(testControl);
  35                 gc.setFont(JFaceResources.getDialogFont());
  36                 fontMetrics = gc.getFontMetrics();
  37                 gc.dispose();
  38         }
  39
  40         /**
  41          * Returns a width hint for a button control.
  42          */
  43         protected static int getButtonWidthHint(Button button) {
  44                 int widthHint = Dialog.convertHorizontalDLUsToPixels(fontMetrics,
  45                                 IDialogConstants.BUTTON_WIDTH);
  46                 return Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT,
  47                                 true).x);
  48         }
  49
  50         public static Button createButton(Composite comp, String label) {
  51                 Button b = new Button(comp, SWT.PUSH);
  52                 b.setText(label);
  53                 if (fontMetrics == null)
  54                         initializeDialogUnits(comp);
  55                 GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL
  56                                 | GridData.VERTICAL_ALIGN_BEGINNING);
  57                 data.widthHint = getButtonWidthHint(b);
  58                 data.heightHint = Dialog.convertVerticalDLUsToPixels(fontMetrics,
  59                                 IDialogConstants.BUTTON_HEIGHT);
  60                 b.setLayoutData(data);
  61                 return b;
  62         }
  63
  64         public static Button createCheckbox(Composite comp, String txt,
  65                         boolean isSelected) {
  66                 Button button = new Button(comp, SWT.CHECK);
  67                 button.setText(txt);
  68                 GridLayout layout = new GridLayout();
  69                 comp.setLayout(layout);
  70                 GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL
  71                                 | GridData.VERTICAL_ALIGN_BEGINNING);
  72                 data.horizontalIndent = 10;
  73                 button.setLayoutData(data);
  74                 button.setSelection(isSelected);
  75                 return button;
  76         }
  77
  78         public static Label createLabel(Composite comp, String txt) {
  79                 Label label = new Label(comp, SWT.NONE);
  80                 label.setText(txt);
  81                 label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING
  82                                 | GridData.VERTICAL_ALIGN_BEGINNING));
  83                 return label;
  84         }
  85 }