org.eclipsercp.hyperbola.presentation.PartTab.java Source code

Introduction

Here is the source code for org.eclipsercp.hyperbola.presentation.PartTab.java

Source

/*******************************************************************************
 * 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 Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipsercp.hyperbola.presentation;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.presentations.IPresentablePart;

public class PartTab extends Canvas implements PaintListener {

    private String text;

    private Image image;

    private boolean selected;

    private boolean focus = false;

    // private IPresentablePart part;

    private static final int VERT_SPACING = 5;

    private static final int HORIZ_SPACING = 3;

    private boolean showImage;

    private boolean showText;

    public PartTab(Composite parent) {
        super(parent, SWT.NONE);
        addPaintListener(this);
    }

    public void paintControl(PaintEvent e) {
        Rectangle titleRect = getClientArea();
        int x = titleRect.x + VERT_SPACING;
        GC gc = e.gc;
        setBackground(getParent().getBackground());
        fill(gc, titleRect.x, titleRect.y, titleRect.width - 1, titleRect.height);

        Image image = getImage();
        if (image != null && showImage) {
            Rectangle imageBounds = image.getBounds();
            int imageX = x;
            int imageHeight = imageBounds.height;
            int imageY = (titleRect.height - imageHeight) / 2;
            int imageWidth = imageBounds.width * imageHeight / imageBounds.height;
            gc.drawImage(image, imageBounds.x, imageBounds.y, imageBounds.width, imageBounds.height, imageX, imageY,
                    imageWidth, imageHeight);
            x += imageWidth + VERT_SPACING;
        }

        int textWidth = titleRect.width - 1;
        if (textWidth > 0 && text != null && showText) {
            gc.setFont(getFont());
            Point extent = gc.textExtent(text, SWT.DRAW_TRANSPARENT | SWT.DRAW_MNEMONIC);
            int textY = titleRect.y + (titleRect.height - extent.y) / 2;

            if (selected)
                gc.setForeground(e.display.getSystemColor(SWT.COLOR_BLACK));
            else
                gc.setForeground(e.display.getSystemColor(SWT.COLOR_DARK_GRAY));
            gc.setFont(JFaceResources.getDefaultFont());
            gc.drawText(text, x, textY, SWT.DRAW_TRANSPARENT | SWT.DRAW_MNEMONIC);
        }

    }

    public Point computeSize(int wHint, int hHint) {
        int width = VERT_SPACING;
        int height = HORIZ_SPACING;
        GC gc = new GC(this);
        if (image != null && showImage) {
            Rectangle imageBounds = image.getBounds();
            height = imageBounds.height + HORIZ_SPACING;
            width += imageBounds.width + VERT_SPACING;
        }

        if (text != null && showText) {
            Point extent = gc.textExtent(text, SWT.DRAW_TRANSPARENT | SWT.DRAW_MNEMONIC);
            width += extent.x + VERT_SPACING;
            height = Math.max(height, extent.y) + HORIZ_SPACING;
        }

        if (wHint != SWT.DEFAULT)
            width = wHint;
        if (hHint != SWT.DEFAULT)
            height = hHint;
        gc.dispose();
        return new Point(width, height);
    }

    private void fill(GC gc, int x, int y, int width, int height) {
        Color fg = null;

        if (!selected)
            fg = getDisplay().getSystemColor(SWT.COLOR_WHITE);
        // else if(focus)
        // fg = getDisplay().getSystemColor(SWT.COLOR_BLUE);
        else
            fg = getDisplay().getSystemColor(SWT.COLOR_GREEN);

        gc.setForeground(fg);

        gc.fillGradientRectangle(x, y, x + width, y + height, true);
    }

    public Point computeSize(int wHint, int hHint, boolean changed) {
        return computeSize(wHint, hHint);
    }

    public void setText(String text) {
        this.text = text;
        redraw();
    }

    public String getText() {
        return this.text;
    }

    public void setImage(Image image) {
        this.image = image;
    }

    public Image getImage() {
        return this.image;
    }

    public void setSelected(boolean selected) {
        this.selected = selected;
        redraw();
    }

    public boolean getSelected() {
        return this.selected;
    }

    public boolean isFocus() {
        return focus;
    }

    public void setFocus(boolean focus) {
        this.focus = focus;
    }

    public void setShowImage(boolean showImage) {
        this.showImage = showImage;
    }

    public void setShowText(boolean showText) {
        this.showText = showText;
    }
}