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/*******************************************************************************
* Copyright (c) 2006, 2016 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.swt.examples.graphics;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Pattern;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Spinner;
/**
* This tab demonstrates various text fonts. It allows the user to specify font
* parameters such as face, style and size.
*/
public class CustomFontTab extends GraphicsTab {
String text = GraphicsExample.getResourceString("SWT");
GraphicsBackground fontForeground;
Combo fontFaceCb, fontStyleCb;
Spinner fontPointSpinner;
Button colorButton;
List<String> fontNames;
int [] styleValues;
String [] fontStyles;
Menu menu;
public CustomFontTab(GraphicsExample example) {
super(example);
// create list of fonts for this platform
FontData [] fontData = Display.getCurrent().getFontList(null, true);
fontNames = new ArrayList<>();
for (FontData element : fontData) {
// remove duplicates and sort
String nextName = element.getName();
if (!fontNames.contains(nextName)) {
int j = 0;
while(j < fontNames.size() && nextName.compareTo(fontNames.get(j)) > 0) {
j++;
}
fontNames.add(j, nextName);
}
}
fontStyles = new String [] {
GraphicsExample.getResourceString("Regular"), //$NON-NLS-1$
GraphicsExample.getResourceString("Italic"), //$NON-NLS-1$
GraphicsExample.getResourceString("Bold"), //$NON-NLS-1$
GraphicsExample.getResourceString("BoldItalic") //$NON-NLS-1$
};
styleValues = new int [] {SWT.NORMAL, SWT.ITALIC, SWT.BOLD, SWT.BOLD | SWT.ITALIC};
}
@Override
public String getCategory() {
return GraphicsExample.getResourceString("Font"); //$NON-NLS-1$
}
@Override
public String getText() {
return GraphicsExample.getResourceString("CustomFont"); //$NON-NLS-1$
}
@Override
public String getDescription() {
return GraphicsExample.getResourceString("CustomFontDescription"); //$NON-NLS-1$
}
@Override
public void dispose() {
if (menu != null) {
menu.dispose();
menu = null;
}
}
@Override
public void createControlPanel(Composite parent) {
Composite mainComp = new Composite(parent, SWT.NONE);
mainComp.setLayout(new RowLayout());
// create combo for font face
Composite comp = new Composite(mainComp, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
new Label(comp, SWT.LEFT).setText(GraphicsExample.getResourceString("FontFace")); //$NON-NLS-1$
fontFaceCb = new Combo(comp, SWT.DROP_DOWN);
for (String name : fontNames) {
fontFaceCb.add(name);
}
fontFaceCb.select(0);
fontFaceCb.addListener(SWT.Selection, event -> example.redraw());
// create combo for font style
comp = new Composite(mainComp, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
new Label(comp, SWT.LEFT).setText(GraphicsExample.getResourceString("FontStyle")); //$NON-NLS-1$
fontStyleCb = new Combo(comp, SWT.DROP_DOWN);
for (String fontStyle : fontStyles) {
fontStyleCb.add(fontStyle);
}
fontStyleCb.select(0);
fontStyleCb.addListener(SWT.Selection, event -> example.redraw());
// create spinner for font size (points)
comp = new Composite(mainComp, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
new Label(comp, SWT.LEFT).setText(GraphicsExample.getResourceString("FontSize")); //$NON-NLS-1$
fontPointSpinner = new Spinner(comp, SWT.BORDER | SWT.WRAP);
fontPointSpinner.setMinimum(1);
fontPointSpinner.setMaximum(1000);
fontPointSpinner.setSelection(200);
fontPointSpinner.addListener(SWT.Selection, event -> example.redraw());
ColorMenu cm = new ColorMenu();
cm.setColorItems(true);
cm.setPatternItems(example.checkAdvancedGraphics());
menu = cm.createMenu(parent.getParent(), gb -> {
fontForeground = gb;
colorButton.setImage(gb.getThumbNail());
example.redraw();
});
// initialize the background to the 2nd item in the menu (black)
fontForeground = (GraphicsBackground)menu.getItem(1).getData();
// create color button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
colorButton = new Button(comp, SWT.PUSH);
colorButton.setText(GraphicsExample.getResourceString("Color")); //$NON-NLS-1$
colorButton.setImage(fontForeground.getThumbNail());
colorButton.addListener(SWT.Selection, event -> {
final Button button = (Button) event.widget;
final Composite parent1 = button.getParent();
Rectangle bounds = button.getBounds();
Point point = parent1.toDisplay(new Point(bounds.x, bounds.y));
menu.setLocation(point.x, point.y + bounds.height);
menu.setVisible(true);
});
}
@Override
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
String fontFace = fontNames.get(fontFaceCb.getSelectionIndex());
int points = fontPointSpinner.getSelection();
int style = styleValues[fontStyleCb.getSelectionIndex()];
Font font = new Font(device, fontFace, points, style);
gc.setFont(font);
gc.setTextAntialias(SWT.ON);
Point size = gc.stringExtent(text);
int textWidth = size.x;
int textHeight = size.y;
Pattern pattern = null;
if (fontForeground.getBgColor1() != null) {
gc.setForeground(fontForeground.getBgColor1());
} else if (fontForeground.getBgImage() != null) {
pattern = new Pattern(device, fontForeground.getBgImage());
gc.setForegroundPattern(pattern);
}
gc.drawString(text, (width-textWidth)/2, (height-textHeight)/2, true);
font.dispose();
if (pattern != null) pattern.dispose();
}
}
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