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drawing-area: allow zooming in and out with keyboard

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git-svn-id: https://micropolis.googlecode.com/svn/trunk/micropolis-java@762 d9718cc8-9f43-0410-858b-315f434eb58c
This commit is contained in:
jason@long.name 2013-07-21 15:34:36 +00:00
parent 45b84f0cbb
commit 1e21066cf2
1 changed files with 39 additions and 6 deletions
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45
src/micropolisj/gui/MainWindow.java
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@ -182,6 +182,21 @@ public class MainWindow extends JFrame
setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
setLocationRelativeTo(null);
getRootPane().getInputMap().put(KeyStroke.getKeyStroke("ADD"), "zoomIn");
getRootPane().getInputMap().put(KeyStroke.getKeyStroke("shift EQUALS"), "zoomIn");
getRootPane().getInputMap().put(KeyStroke.getKeyStroke("MINUS"), "zoomOut");
getRootPane().getActionMap().put("zoomIn", new AbstractAction() {
public void actionPerformed(ActionEvent evt) {
doZoom(1);
}
});
getRootPane().getActionMap().put("zoomOut", new AbstractAction() {
public void actionPerformed(ActionEvent evt) {
doZoom(-1);
}
});
MouseAdapter mouse = new MouseAdapter() {
public void mousePressed(MouseEvent ev)
{
@ -990,12 +1005,10 @@ public class MainWindow extends JFrame
notificationPane.showZoneStatus(engine, xpos, ypos, z);
}
private void onMouseWheelMoved(MouseWheelEvent evt)
private void doZoom(int dir, Point mousePt)
{
boolean zoomOut = evt.getWheelRotation() > 0;
int oldZoom = drawingArea.getTileSize();
int newZoom = zoomOut ? (oldZoom / 2) : (oldZoom * 2);
int newZoom = dir < 0 ? (oldZoom / 2) : (oldZoom * 2);
if (newZoom < 8) { newZoom = 8; }
if (newZoom > 32) { newZoom = 32; }
@ -1004,14 +1017,34 @@ public class MainWindow extends JFrame
// preserve effective mouse position in viewport when changing zoom level
double f = (double)newZoom / (double)oldZoom;
Point pos = drawingAreaScroll.getViewport().getViewPosition();
int newX = (int)Math.round(evt.getX() * f - (evt.getX() - pos.x));
int newY = (int)Math.round(evt.getY() * f - (evt.getY() - pos.y));
int newX = (int)Math.round(mousePt.x * f - (mousePt.x - pos.x));
int newY = (int)Math.round(mousePt.y * f - (mousePt.y - pos.y));
drawingArea.selectTileSize(newZoom);
drawingAreaScroll.validate();
drawingAreaScroll.getViewport().setViewPosition(new Point(newX, newY));
}
}
private void doZoom(int dir)
{
Rectangle rect = drawingAreaScroll.getViewport().getViewRect();
doZoom(dir,
new Point(rect.x + rect.width/2,
rect.y + rect.height/2
)
);
}
private void onMouseWheelMoved(MouseWheelEvent evt)
{
if (evt.getWheelRotation() < 0) {
doZoom(1, evt.getPoint());
}
else {
doZoom(-1, evt.getPoint());
}
}
// used when a tool is being pressed
ToolStroke toolStroke;