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Middle mouse click activates mouse movement scroll mode, similar to web

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browsers
This commit is contained in:
Branislav Stojkovic
2019-01-15 23:37:56 +01:00
parent e5fff0b538
commit 984edc196b
4 changed files with 32 additions and 3 deletions
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diylc/diylc-swing/src/org/diylc/swing/plugins/canvas/CanvasPlugin.java
+28 -3
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@@ -17,6 +17,7 @@
*/
package org.diylc.swing.plugins.canvas;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Rectangle;
@@ -106,6 +107,11 @@ public class CanvasPlugin implements IPlugIn, ClipboardOwner {
private Clipboard clipboard;
private double zoomLevel = 1;
// mouse scroll mode
private boolean mouseScrollMode = false;
private Point mouseScrollPrevLocation = null;
private static double MOUSE_SCROLL_SPEED = 0.8;
public CanvasPlugin(ISwingUI swingUI) {
this.swingUI = swingUI;
@@ -141,8 +147,17 @@ public class CanvasPlugin implements IPlugIn, ClipboardOwner {
@Override
public void mouseClicked(MouseEvent e) {
plugInPort.mouseClicked(e.getPoint(), e.getButton(), Utils.isMac() ? e.isMetaDown() : e.isControlDown(), e.isShiftDown(), e.isAltDown(),
if (!mouseScrollMode && e.getButton() == MouseEvent.BUTTON2) {
mouseScrollPrevLocation = null;
mouseScrollMode = true;
canvasPanel.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
} else if (mouseScrollMode) {
mouseScrollMode = false;
canvasPanel.setCursor(plugInPort.getCursorAt(e.getPoint()));
} else {
plugInPort.mouseClicked(e.getPoint(), e.getButton(), Utils.isMac() ? e.isMetaDown() : e.isControlDown(), e.isShiftDown(), e.isAltDown(),
e.getClickCount());
}
}
@Override
@@ -210,8 +225,18 @@ public class CanvasPlugin implements IPlugIn, ClipboardOwner {
@Override
public void mouseMoved(MouseEvent e) {
canvasPanel.setCursor(plugInPort.getCursorAt(e.getPoint()));
plugInPort.mouseMoved(e.getPoint(), Utils.isMac() ? e.isMetaDown() : e.isControlDown(), e.isShiftDown(), e.isAltDown());
if (mouseScrollMode) {
if (mouseScrollPrevLocation != null) {
int dx = (int) ((e.getPoint().x - mouseScrollPrevLocation.x) * MOUSE_SCROLL_SPEED);
int dy = (int) ((e.getPoint().y - mouseScrollPrevLocation.y) * MOUSE_SCROLL_SPEED);
scrollPane.getHorizontalScrollBar().setValue(scrollPane.getHorizontalScrollBar().getValue() + dx);
scrollPane.getVerticalScrollBar().setValue(scrollPane.getVerticalScrollBar().getValue() + dy);
}
mouseScrollPrevLocation = e.getPoint();
} else {
canvasPanel.setCursor(plugInPort.getCursorAt(e.getPoint()));
plugInPort.mouseMoved(e.getPoint(), Utils.isMac() ? e.isMetaDown() : e.isControlDown(), e.isShiftDown(), e.isAltDown());
}
}
});
}