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/*******************************************************************************
* Copyright (c) 2006 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 org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This tab demonstrates line styles applicable to a line. It shows the use of the
* <code>GC.setLineStyle()</code> method.
*/
public class LineStyleTab extends GraphicsTab {
Button colorButton;
GraphicsBackground lineColor;
Menu menu;
Spinner lineWidthSpinner;
public LineStyleTab(GraphicsExample example) {
super(example);
}
public String getCategory() {
return GraphicsExample.getResourceString("Lines"); //$NON-NLS-1$
}
public String getText() {
return GraphicsExample.getResourceString("LineStyles"); //$NON-NLS-1$
}
public String getDescription() {
return GraphicsExample.getResourceString("LineStylesDescription"); //$NON-NLS-1$
}
public void dispose() {
if (menu != null) {
menu.dispose();
menu = null;
}
}
public void createControlPanel(Composite parent) {
Composite comp;
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
new Label(comp, SWT.CENTER).setText(GraphicsExample
.getResourceString("LineWidth")); //$NON-NLS-1$
lineWidthSpinner = new Spinner(comp, SWT.BORDER | SWT.WRAP);
lineWidthSpinner.setSelection(10);
lineWidthSpinner.setMinimum(1);
lineWidthSpinner.setMaximum(30);
lineWidthSpinner.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
example.redraw();
}
});
ColorMenu cm = new ColorMenu();
cm.setPatternItems(example.checkAdvancedGraphics());
menu = cm.createMenu(parent.getParent(), new ColorListener() {
public void setColor(GraphicsBackground gb) {
lineColor = gb;
colorButton.setImage(gb.getThumbNail());
example.redraw();
}
});
// create color button
comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout());
// initialize the foreground to the 5th item in the menu (blue)
lineColor = (GraphicsBackground)menu.getItem(4).getData();
// color button
colorButton = new Button(comp, SWT.PUSH);
colorButton.setText(GraphicsExample
.getResourceString("Color")); //$NON-NLS-1$
colorButton.setImage(lineColor.getThumbNail());
colorButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
final Button button = (Button) event.widget;
final Composite parent = button.getParent();
Rectangle bounds = button.getBounds();
Point point = parent.toDisplay(new Point(bounds.x, bounds.y));
menu.setLocation(point.x, point.y + bounds.height);
menu.setVisible(true);
}
});
}
public void paint(GC gc, int width, int height) {
Device device = gc.getDevice();
Pattern pattern = null;
if (lineColor.getBgColor1() != null) {
gc.setForeground(lineColor.getBgColor1());
} else if (lineColor.getBgImage() != null) {
pattern = new Pattern(device, lineColor.getBgImage());
gc.setForegroundPattern(pattern);
}
// set line width
gc.setLineWidth(lineWidthSpinner.getSelection());
// draw lines with caps
gc.drawLine(3*width/16, 1*height/6, 13*width/16, 1*height/6);
gc.setLineStyle(SWT.LINE_DASH);
gc.drawLine(3*width/16, 2*height/6, 13*width/16, 2*height/6);
gc.setLineStyle(SWT.LINE_DOT);
gc.drawLine(3*width/16, 3*height/6, 13*width/16, 3*height/6);
gc.setLineStyle(SWT.LINE_DASHDOT);
gc.drawLine(3*width/16, 4*height/6, 13*width/16, 4*height/6);
gc.setLineStyle(SWT.LINE_DASHDOTDOT);
gc.drawLine(3*width/16, 5*height/6, 13*width/16, 5*height/6);
// draw labels
Font font = new Font(device, getPlatformFont(), 20, SWT.NORMAL);
gc.setFont(font);
gc.setForeground(device.getSystemColor(SWT.COLOR_BLACK));
String text = GraphicsExample.getResourceString("Solid"); //$NON-NLS-1$
Point size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 1*height/12, true);
text = GraphicsExample.getResourceString("Dash"); //$NON-NLS-1$
size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 3*height/12, true);
text = GraphicsExample.getResourceString("Dot"); //$NON-NLS-1$
size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 5*height/12, true);
text = GraphicsExample.getResourceString("DashDot"); //$NON-NLS-1$
size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 7*height/12, true);
text = GraphicsExample.getResourceString("DashDotDot"); //$NON-NLS-1$
size = gc.stringExtent(text);
gc.drawString(text, (width-size.x)/2, 9*height/12, true);
font.dispose();
}
/**
* Returns the name of a valid font for the resident platform.
*/
static String getPlatformFont() {
if(SWT.getPlatform() == "win32") {
return "Arial";
} else if (SWT.getPlatform() == "motif") {
return "Helvetica";
} else if (SWT.getPlatform() == "gtk") {
return "Baekmuk Batang";
} else if (SWT.getPlatform() == "carbon") {
return "Arial";
} else { // photon, etc ...
return "Verdana";
}
}
}
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