mirror of
https://github.com/octoleo/plantuml.git
synced 2024-06-13 05:32:25 +00:00
132 lines
3.8 KiB
Java
132 lines
3.8 KiB
Java
/* ========================================================================
|
|
* PlantUML : a free UML diagram generator
|
|
* ========================================================================
|
|
*
|
|
* (C) Copyright 2009-2024, Arnaud Roques
|
|
*
|
|
* Project Info: https://plantuml.com
|
|
*
|
|
* If you like this project or if you find it useful, you can support us at:
|
|
*
|
|
* https://plantuml.com/patreon (only 1$ per month!)
|
|
* https://plantuml.com/paypal
|
|
*
|
|
* This file is part of PlantUML.
|
|
*
|
|
* PlantUML is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* PlantUML distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
|
* License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
|
|
* USA.
|
|
*
|
|
*
|
|
* Original Author: Arnaud Roques
|
|
*
|
|
*
|
|
*/
|
|
package net.sourceforge.plantuml.swing;
|
|
|
|
import java.awt.Color;
|
|
import java.awt.Dimension;
|
|
import java.awt.Rectangle;
|
|
import java.awt.event.MouseEvent;
|
|
import java.awt.event.MouseMotionListener;
|
|
|
|
import javax.swing.ImageIcon;
|
|
import javax.swing.JLabel;
|
|
import javax.swing.Scrollable;
|
|
import javax.swing.SwingConstants;
|
|
|
|
class ScrollablePicture extends JLabel implements Scrollable, MouseMotionListener {
|
|
|
|
private int maxUnitIncrement = 1;
|
|
private boolean missingPicture = false;
|
|
|
|
public ScrollablePicture(ImageIcon i, int m) {
|
|
super(i);
|
|
if (i == null) {
|
|
missingPicture = true;
|
|
setText("No picture found.");
|
|
setHorizontalAlignment(CENTER);
|
|
setOpaque(true);
|
|
setBackground(Color.white);
|
|
}
|
|
maxUnitIncrement = m;
|
|
|
|
// Let the user scroll by dragging to outside the window.
|
|
setAutoscrolls(true); // enable synthetic drag events
|
|
addMouseMotionListener(this); // handle mouse drags
|
|
}
|
|
|
|
// Methods required by the MouseMotionListener interface:
|
|
public void mouseMoved(MouseEvent e) {
|
|
}
|
|
|
|
public void mouseDragged(MouseEvent e) {
|
|
// The user is dragging us, so scroll!
|
|
Rectangle r = new Rectangle(e.getX(), e.getY(), 1, 1);
|
|
scrollRectToVisible(r);
|
|
}
|
|
|
|
@Override
|
|
public Dimension getPreferredSize() {
|
|
if (missingPicture) {
|
|
return new Dimension(320, 480);
|
|
} else {
|
|
return super.getPreferredSize();
|
|
}
|
|
}
|
|
|
|
public Dimension getPreferredScrollableViewportSize() {
|
|
return getPreferredSize();
|
|
}
|
|
|
|
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
|
|
// Get the current position.
|
|
int currentPosition = 0;
|
|
if (orientation == SwingConstants.HORIZONTAL) {
|
|
currentPosition = visibleRect.x;
|
|
} else {
|
|
currentPosition = visibleRect.y;
|
|
}
|
|
|
|
// Return the number of pixels between currentPosition
|
|
// and the nearest tick mark in the indicated direction.
|
|
if (direction < 0) {
|
|
int newPosition = currentPosition - (currentPosition / maxUnitIncrement) * maxUnitIncrement;
|
|
return (newPosition == 0) ? maxUnitIncrement : newPosition;
|
|
} else {
|
|
return ((currentPosition / maxUnitIncrement) + 1) * maxUnitIncrement - currentPosition;
|
|
}
|
|
}
|
|
|
|
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
|
|
if (orientation == SwingConstants.HORIZONTAL) {
|
|
return visibleRect.width - maxUnitIncrement;
|
|
} else {
|
|
return visibleRect.height - maxUnitIncrement;
|
|
}
|
|
}
|
|
|
|
public boolean getScrollableTracksViewportWidth() {
|
|
return false;
|
|
}
|
|
|
|
public boolean getScrollableTracksViewportHeight() {
|
|
return false;
|
|
}
|
|
|
|
public void setMaxUnitIncrement(int pixels) {
|
|
maxUnitIncrement = pixels;
|
|
}
|
|
}
|