82 lines
3.5 KiB
Java
82 lines
3.5 KiB
Java
/*******************************************************************************
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* Copyright (c) 2015-2021 MINRES Technologies GmbH and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* MINRES Technologies GmbH - initial API and implementation
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*******************************************************************************/
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package com.minres.scviewer.database.ui.swt.internal;
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import java.text.DecimalFormat;
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import org.eclipse.swt.SWT;
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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.Rectangle;
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import org.eclipse.wb.swt.SWTResourceManager;
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public class RulerPainter implements IPainter {
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protected final WaveformCanvas waveCanvas;
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static final int RULER_TICK_MINOR = 10;
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static final int RULER_TICK_MAJOR = 100;
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static final DecimalFormat df = new DecimalFormat("#.00####");
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public RulerPainter(WaveformCanvas waveCanvas) {
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this.waveCanvas=waveCanvas;
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}
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@Override
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public void paintArea(Projection proj, Rectangle area) {
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GC gc = proj.getGC();
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Color headerFgColor=waveCanvas.getDisplay().getSystemColor(SWT.COLOR_WIDGET_FOREGROUND);
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if(headerFgColor.isDisposed())
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headerFgColor=SWTResourceManager.getColor(0,0,0);
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Color headerBgColor = waveCanvas.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
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if(headerBgColor.isDisposed())
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headerBgColor=SWTResourceManager.getColor(255,255,255);
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String unit=waveCanvas.getUnitStr();
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int unitMultiplier=waveCanvas.getUnitMultiplier();
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long scaleFactor=waveCanvas.getScaleFactor();
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long startPos=area.x*scaleFactor;
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long startVal=startPos - proj.getTranslation().x*scaleFactor;
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long endPos=startPos+area.width*scaleFactor;
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long rulerTickMinor = RULER_TICK_MINOR*scaleFactor;
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long rulerTickMajor = RULER_TICK_MAJOR*scaleFactor;
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int minorTickY = waveCanvas.rulerHeight-5;
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int majorTickY = waveCanvas.rulerHeight-15;
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int textY=waveCanvas.rulerHeight-20;
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int baselineY=waveCanvas.rulerHeight - 1;
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int bottom=waveCanvas.rulerHeight - 2;
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long modulo = startVal % rulerTickMinor;
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long startMinorIncrPos = startPos+rulerTickMinor-modulo;
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long startMinorIncrVal = startVal+rulerTickMinor-modulo;
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gc.setBackground(waveCanvas.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
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gc.fillRectangle(new Rectangle(area.x, area.y, area.width, waveCanvas.rulerHeight));
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gc.setBackground(headerBgColor);
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gc.fillRectangle(new Rectangle(area.x, area.y, area.width, baselineY));
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gc.setForeground(headerFgColor);
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gc.drawLine(area.x, area.y+bottom, area.x+area.width, area.y+bottom);
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for (long pos = startMinorIncrPos, tick = startMinorIncrVal; pos < endPos; pos+= rulerTickMinor, tick += rulerTickMinor) {
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int x0Pos = (int) (pos/scaleFactor);
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long x0Val = tick/scaleFactor;
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if ((tick % rulerTickMajor) == 0) {
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gc.drawText(df.format(x0Val*unitMultiplier)+unit, x0Pos, area.y+textY);
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gc.drawLine(x0Pos, area.y+majorTickY, x0Pos,area.y+ bottom);
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} else {
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gc.drawLine(x0Pos, area.y+minorTickY, x0Pos, area.y+bottom);
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}
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}
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}
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}
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