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added a double buffer to improve drawing speed when drawing wires or adding elements

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This commit is contained in:
hneemann 2016-08-18 11:22:38 +02:00
parent d295e425c0
commit 92f76a7f7c
1 changed files with 12 additions and 5 deletions
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17
src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
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@ -41,6 +41,9 @@ import static de.neemann.digital.draw.shapes.GenericShape.SIZE2;
import static java.awt.event.InputEvent.CTRL_DOWN_MASK;
/**
* Component which shows the circuit.
* ToDo: refactoring of repaint logic. Its to complex now.
*
* @author hneemann
*/
public class CircuitComponent extends JComponent implements Circuit.ChangedListener {
@ -341,16 +344,18 @@ public class CircuitComponent extends JComponent implements Circuit.ChangedListe
private BufferedImage buffer;
private int highlightedNumPainted;
private int highlightedPaintedCount;
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (highLighted.size() != highlightedNumPainted)
hasChanged = true;
if (hasChanged
|| buffer == null
|| getWidth() != buffer.getWidth()
|| getHeight() != buffer.getHeight()
|| highLighted.size() != highlightedPaintedCount) {
if (hasChanged || buffer == null || getWidth() != buffer.getWidth() || getHeight() != buffer.getHeight()) {
// long time = System.currentTimeMillis();
buffer = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().createCompatibleImage(getWidth(), getHeight());
Graphics2D gr2 = buffer.createGraphics();
@ -360,7 +365,7 @@ public class CircuitComponent extends JComponent implements Circuit.ChangedListe
GraphicSwing gr = new GraphicSwing(gr2, (int) (2 / transform.getScaleX()));
circuit.drawTo(gr, highLighted, modelSync);
highlightedNumPainted = highLighted.size();
highlightedPaintedCount = highLighted.size();
hasChanged = false;
// System.out.println(System.currentTimeMillis() - time); // -agentlib:hprof=cpu=samples
}
@ -382,6 +387,8 @@ public class CircuitComponent extends JComponent implements Circuit.ChangedListe
/**
* forces a immediately repaint
* Is called from {@link de.neemann.digital.gui.GuiModelObserver} if the models data has changed.
* Therefore the double buffer is invalidated.
*/
public void paintImmediately() {
hasChanged = true;