100 lines
2.6 KiB
Java
100 lines
2.6 KiB
Java
package com.minres.scviewer.ui.swt;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.events.DisposeEvent;
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import org.eclipse.swt.events.DisposeListener;
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import org.eclipse.swt.events.PaintEvent;
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import org.eclipse.swt.events.PaintListener;
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import org.eclipse.swt.graphics.Color;
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import org.eclipse.swt.graphics.GC;
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import org.eclipse.swt.graphics.Point;
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import org.eclipse.swt.graphics.Rectangle;
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import org.eclipse.swt.widgets.Composite;
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import com.minres.scviewer.ui.TxEditorPlugin;
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public class Ruler extends Composite {
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static final int height = 20;
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static final int rulerTickMinor = 10;
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static final int rulerTickMajor = 100;
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private int length;
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private int start;
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private TxEditorPlugin plugin;
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private Color headerBgColor;
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private Color headerFgColor;
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Ruler(Composite parent, int style, int lenght) {
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super(parent, style | SWT.DOUBLE_BUFFERED);
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this.length=lenght;
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headerBgColor=getDisplay().getSystemColor(SWT.COLOR_WHITE);
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headerFgColor=getDisplay().getSystemColor(SWT.COLOR_BLACK);
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plugin=TxEditorPlugin.getDefault();
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if(plugin!=null){
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headerBgColor=plugin.getColor(TxEditorPlugin.headerBgColor);
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headerFgColor=plugin.getColor(TxEditorPlugin.headerFgColor);
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}
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addDisposeListener(new DisposeListener() {
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public void widgetDisposed(DisposeEvent e) {
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Ruler.this.widgetDisposed(e);
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}
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});
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addPaintListener(new PaintListener() {
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public void paintControl(PaintEvent e) {
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Ruler.this.paintControl(e);
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}
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});
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}
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public int getLength() {
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return length;
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}
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public void setLength(int length) {
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this.length = length;
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layout(true);
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redraw();
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}
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protected void widgetDisposed(DisposeEvent e) {
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}
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void paintControl(PaintEvent e) {
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GC gc = e.gc;
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int startMinorIncr = start;
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int modulo = start % rulerTickMinor;
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startMinorIncr+=rulerTickMinor-modulo;
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int bottom=height - 2;
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int end=start+e.width;
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gc.setBackground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
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gc.fillRectangle(new Rectangle(e.x, e.y, e.width, height));
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gc.setBackground(headerBgColor);
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gc.fillRectangle(new Rectangle(e.x, e.y, e.width, height - 1));
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gc.setForeground(headerFgColor);
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gc.drawLine(0, bottom, e.width, bottom);
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for (int tick = startMinorIncr; tick < end; tick += rulerTickMinor) {
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int x0 = tick-start;
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if ((tick % rulerTickMajor) == 0) {
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gc.drawLine(x0, 10, x0, bottom);
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gc.drawText(Integer.toString(tick), x0, 0);
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} else {
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gc.drawLine(x0, 15, x0, bottom);
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}
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}
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}
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@Override
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public Point computeSize(int wHint, int hHint, boolean changed) {
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return new Point(0, height);
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}
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public void setStartPoint(int start) {
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this.start=start;
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redraw();
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}
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}
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