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DragAction.pde
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DragAction.pde
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// Based on https://processing.org/discourse/beta/num_1253804974.html
interface IDragStep {
void action(PGraphics g, int start_x, int start_y, int current_x, int current_y);
}
public class PropagateTarget {
PGraphics buffer;
boolean isUpdatedAtEveryStep;
public PropagateTarget(PGraphics buffer, boolean isUpdatedAtEveryStep) {
this.buffer = buffer;
this.isUpdatedAtEveryStep = isUpdatedAtEveryStep;
}
public PropagateTarget(PGraphics buffer) {
this(buffer, false);
}
}
public class DragAction extends EventHandler implements IDrawer {
protected int start_x; // catch the start dragging point x
protected int start_y; // catch the start dragging point y
protected int current_x; // record moving mouseX
protected int current_y; // record moving mouseY
protected color DEFAULT_FINAL_COLOR = color(255, 204, 0, 255); // full-opaque
protected color DEFAULT_TRANS_COLOR = color(255, 204, 0, 127); // half-transparent
protected color transcolor = -1; //HACK
protected color finalcolor = -1; //HACK
IDragStep dragStep;
PGraphics screen;
ArrayList<PropagateTarget> propagateTargets = new ArrayList<PropagateTarget>();
private UndoableEdit undoableEdit;
public DragAction (PGraphics screen, IDragStep dragStep, color finalcolor) {
this.screen = screen;
this.dragStep = dragStep;
this.finalcolor = finalcolor;
}
public DragAction (PGraphics screen, IDragStep dragStep) {
this(screen, dragStep, -1);
}
public DragAction propagateTo(PGraphics buffer, boolean isUpdatedAtEveryStep) {
this.propagateTargets.add(new PropagateTarget(buffer, isUpdatedAtEveryStep));
return this;
}
public DragAction propagateTo(PGraphics buffer) {
return propagateTo(buffer, false);
}
void draw() {
if (toolbar.pointIsInside(start_x, start_y)
|| toolbar.pointIsInside(current_x, current_y)
|| scanningController.pointIsInsideTopbar(start_x, start_y)
|| scanningController.pointIsInsideTopbar(current_x, current_y))
return;
int sizex = current_x - start_x;
int sizey = current_y - start_y;
if (sizex == 0 && sizey == 0)
return;
fill(transcolor());
dragStep.action(screen, start_x, start_y, current_x, current_y);
for (PropagateTarget target : propagateTargets) {
if (target.isUpdatedAtEveryStep)
dragStep.action(target.buffer, start_x, start_y, current_x, current_y);
}
}
void mousePressed() {
start_x = mouseX;
start_y = mouseY;
mouseDragged(); // Reset vars
if (toolbar.pointIsInside(start_x, start_y)
|| scanningController.pointIsInsideTopbar(start_x, start_y))
return;
ArrayList<PropagateTarget> savedTargets = new ArrayList<PropagateTarget>(propagateTargets);
savedTargets.add(new PropagateTarget(screen, false));
undoableEdit = new UndoableEdit(savedTargets);
}
void mouseDragged() {
current_x = mouseX;
current_y = mouseY;
if (toolbar.pointIsInside(current_x, current_y)
|| scanningController.pointIsInsideTopbar(current_x, current_y))
return;
stroke(255,255,255);
fill(transcolor());
}
void mouseReleased() {
//undoableEdit.updateBoundingBox(start_x, start_y, current_x, current_y);
if (toolbar.pointIsInside(start_x, start_y)
|| toolbar.pointIsInside(current_x, current_y)
|| scanningController.pointIsInsideTopbar(start_x, start_y)
|| scanningController.pointIsInsideTopbar(current_x, current_y))
return;
fill(finalcolor());
dragStep.action(screen, start_x, start_y, current_x, current_y);
for (PropagateTarget target : propagateTargets) {
target.buffer.beginDraw();
target.buffer.noStroke();
target.buffer.fill(finalcolor());
target.buffer.endDraw();
dragStep.action(target.buffer, start_x, start_y, current_x, current_y);
}
try {
undoableEdit.finalize();
undoManager.addEdit(undoableEdit);
} catch(Exception e) {
e.printStackTrace(System.out);
}
reset();
}
protected DragAction reset() {
start_x = start_y = current_x = current_y = 0;
return this;
}
protected color finalcolor() {
if (this.finalcolor != -1) //HACK
return this.finalcolor;
else
return colourManager.activeColour();
}
protected color transcolor() {
if (this.transcolor != -1) //HACK
return this.transcolor;
else
return color(colourManager.activeColour(), 127);
}
}
public static void stopAllDragActionHandlers() {
for (Object handler : EVENT_LISTENERS) {
if (handler instanceof DragAction) {
((DragAction)handler).stop();
}
}
}
public static void stopAllDrawHandlers() {
for (Object handler : EVENT_LISTENERS) {
if (handler instanceof DragAction
|| handler instanceof SelectionController //HACK
|| handler instanceof ZoomAndPanController //HACK
) {
((EventHandler)handler).stop();
}
}
}