+package net.mograsim.logic.ui;
+
+import java.util.function.Consumer;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Event;
+
+import net.haspamelodica.swt.helper.gcs.GeneralGC;
+import net.haspamelodica.swt.helper.swtobjectwrappers.Point;
+import net.haspamelodica.swt.helper.swtobjectwrappers.Rectangle;
+import net.haspamelodica.swt.helper.zoomablecanvas.ZoomableCanvas;
+import net.mograsim.logic.ui.model.ViewModel;
+import net.mograsim.logic.ui.model.components.GUIComponent;
+import net.mograsim.logic.ui.model.wires.GUIWire;
+import net.mograsim.logic.ui.model.wires.Pin;
+
+/**
+ * Simulation visualizer canvas.
+ *
+ * @author Daniel Kirschten
+ */
+public class LogicUICanvas extends ZoomableCanvas
+{
+ private static final boolean DRAW_PINS = false;
+
+ private final ViewModel model;
+
+ public LogicUICanvas(Composite parent, int style, ViewModel model)
+ {
+ super(parent, style);
+
+ this.model = model;
+
+ Consumer<Object> redrawConsumer = o -> redrawThreadsafe();
+ Consumer<Pin> pinAddedListener = p ->
+ {
+ p.addPinMovedListener(redrawConsumer);
+ redrawThreadsafe();
+ };
+ Consumer<Pin> pinRemovedListener = p ->
+ {
+ p.removePinMovedListener(redrawConsumer);
+ redrawThreadsafe();
+ };
+ Consumer<? super GUIComponent> componentAddedListener = c ->
+ {
+ c.addComponentLookChangedListener(redrawConsumer);
+ c.addComponentMovedListener(redrawConsumer);
+ c.addPinAddedListener(pinAddedListener);
+ c.addPinRemovedListener(pinRemovedListener);
+ redrawThreadsafe();
+ };
+ model.addComponentAddedListener(componentAddedListener);
+ model.getComponents().forEach(componentAddedListener);
+ model.addComponentRemovedListener(c ->
+ {
+ c.removeComponentLookChangedListener(redrawConsumer);
+ c.removeComponentMovedListener(redrawConsumer);
+ c.removePinAddedListener(pinAddedListener);
+ c.removePinRemovedListener(pinRemovedListener);
+ redrawThreadsafe();
+ });
+ Consumer<? super GUIWire> wireAddedListener = w ->
+ {
+ w.addWireLookChangedListener(redrawConsumer);
+ redrawThreadsafe();
+ };
+ model.addWireAddedListener(wireAddedListener);
+ model.getWires().forEach(wireAddedListener);
+ model.addWireRemovedListener(w ->
+ {
+ w.removeWireLookChangedListener(redrawConsumer);
+ redrawThreadsafe();
+ });
+
+ addZoomedRenderer(gc ->
+ {
+ gc.setLineWidth(.5);
+ model.getWires().forEach(w -> w.render(gc));
+ Rectangle visibleRegion = new Rectangle(offX, offY, gW / zoom, gH / zoom);
+ model.getComponents().forEach(c -> drawComponent(gc, c, visibleRegion));
+ });
+ addListener(SWT.MouseDown, this::mouseDown);
+ }
+
+ private void drawComponent(GeneralGC gc, GUIComponent component, Rectangle visibleRegion)
+ {
+ component.render(gc, visibleRegion);
+ if (DRAW_PINS)
+ {
+ gc.setBackground(getDisplay().getSystemColor(SWT.COLOR_DARK_CYAN));
+ for (Pin p : component.getPins())
+ {
+ Point pos = p.getPos();
+ gc.fillOval(pos.x - 1, pos.y - 1, 2, 2);
+ }
+ }
+ }
+
+ private void mouseDown(Event e)
+ {
+ if (e.button == 1)
+ {
+ Point click = displayToWorldCoords(e.x, e.y);
+ for (GUIComponent component : model.getComponents())
+ if (component.getBounds().contains(click) && component.clicked(click.x, click.y))
+ {
+ redraw();
+ break;
+ }
+ }
+ }
+}
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