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  • Committer: srba.jiri at gmail
  • Date: 2018-07-06 10:33:18 UTC
  • mfrom: (952.5.187 guirefactor)
  • Revision ID: srba.jiri@gmail.com-20180706103318-u96e2a9ekuqtq08m
merged in branch lp:tapaal/anniversary-next10 refactoring the GUI

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src/dk/aau/cs/gui/components/handlers/DragHandler.java
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package dk.aau.cs.gui.components.handlers;
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import java.awt.Point;
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import java.awt.event.MouseEvent;
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import javax.swing.JComponent;
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import pipe.gui.Grid;
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import dk.aau.cs.gui.DrawingSurface;
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public class DragHandler extends javax.swing.event.MouseInputAdapter {
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        private Point anchorPoint;
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        private JComponent draggableComponent;
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        private DrawingSurface drawingSurface;
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        private boolean snapToGrid;
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        public DragHandler(JComponent draggableComponent,
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                        DrawingSurface drawingSurface, boolean snapToGrid) {
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                this.draggableComponent = draggableComponent;
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                this.drawingSurface = drawingSurface;
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                this.snapToGrid = snapToGrid;
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        }
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        @Override
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        public void mouseMoved(MouseEvent e) {
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                anchorPoint = e.getPoint();
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        }
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        @Override
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        public void mouseDragged(MouseEvent e) {
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                int anchorX = anchorPoint.x;
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                int anchorY = anchorPoint.y;
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                Point parentOnScreen = draggableComponent.getParent().getLocationOnScreen();
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                Point mouseOnScreen = e.getLocationOnScreen();
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                int x = Math.max(0, mouseOnScreen.x - parentOnScreen.x - anchorX);
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                int y = Math.max(0, mouseOnScreen.y - parentOnScreen.y - anchorY);
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                if (snapToGrid) {
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                        x = Grid.getModifiedX(x);
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                        y = Grid.getModifiedY(y);
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                }
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                Point position = new Point(x, y);
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                draggableComponent.setLocation(position);
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                drawingSurface.updatePreferredSize();
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        }
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}
 
 
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