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Support zoom for map

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drdev
2014-12-17 03:44:29 +00:00
parent 1440645a33
commit 07572b9103
1 changed files with 36 additions and 0 deletions
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36
forge-gui-mobile/src/forge/screens/planarconquest/CommandCenterScreen.java
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@@ -204,6 +204,42 @@ public class CommandCenterScreen extends FScreen implements IVCommandCenter {
return new ScrollBounds(mapData.getWidth(), mapData.getHeight());
}
@Override
public boolean zoom(float x, float y, float amount) {
float oldScrollLeft = getScrollLeft();
float oldScrollTop = getScrollTop();
float oldScrollWidth = getScrollWidth();
float oldScrollHeight = getScrollHeight();
x += oldScrollLeft;
y += oldScrollTop;
if (amount > 0) {
zoom *= 1.1f;
if (zoom > 4f) {
zoom = 4f;
}
}
else {
zoom /= 1.1f;
if (zoom < 0.25f) {
zoom = 0.25f;
}
}
revalidate(); //apply change in height to all scroll panes
//adjust scroll positions to keep x, y in the same spot
float newScrollWidth = getScrollWidth();
float xAfter = x * newScrollWidth / oldScrollWidth;
setScrollLeft(oldScrollLeft + xAfter - x);
float newScrollHeight = getScrollHeight();
float yAfter = y * newScrollHeight / oldScrollHeight;
setScrollTop(oldScrollTop + yAfter - y);
return true;
}
@Override
protected void drawBackground(Graphics g0) {
if (mapData == null) { return; }
g = g0;