X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=LogicUI%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fui%2Fmodel%2FViewModel.java;fp=LogicUI%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fui%2Fmodel%2FViewModel.java;h=717ee13a59bcf4e972aa35fac4be57667b74be35;hb=0009789a8df6b8d4562b6e1cbfa75102a7516ea8;hp=0000000000000000000000000000000000000000;hpb=a28f7aa0dab4248e99159c5a647676170cb17a4e;p=Mograsim.git

diff --git a/LogicUI/src/net/mograsim/logic/ui/model/ViewModel.java b/LogicUI/src/net/mograsim/logic/ui/model/ViewModel.java
new file mode 100644
index 00000000..717ee13a
--- /dev/null
+++ b/LogicUI/src/net/mograsim/logic/ui/model/ViewModel.java
@@ -0,0 +1,110 @@
+package net.mograsim.logic.ui.model;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.function.Consumer;
+
+import net.mograsim.logic.ui.model.components.GUIComponent;
+import net.mograsim.logic.ui.model.wires.GUIWire;
+
+public class ViewModel
+{
+	private final List<GUIComponent> components;
+	private final List<GUIComponent> componentsUnmodifiable;
+	private final List<GUIWire> wires;
+	private final List<GUIWire> wiresUnmodifiable;
+
+	private final List<Consumer<? super GUIComponent>> componentAddedListeners;
+	private final List<Consumer<? super GUIComponent>> componentRemovedListeners;
+	private final List<Consumer<? super GUIWire>> wireAddedListeners;
+	private final List<Consumer<? super GUIWire>> wireRemovedListeners;
+
+	public ViewModel()
+	{
+		components = new ArrayList<>();
+		componentsUnmodifiable = Collections.unmodifiableList(components);
+		wires = new ArrayList<>();
+		wiresUnmodifiable = Collections.unmodifiableList(wires);
+
+		componentAddedListeners = new ArrayList<>();
+		componentRemovedListeners = new ArrayList<>();
+		wireAddedListeners = new ArrayList<>();
+		wireRemovedListeners = new ArrayList<>();
+	}
+
+	/**
+	 * Adds the given component to the list of components and calls all componentAddedListeners. Don't call this method from application
+	 * code as it is automatically called in GUIComponent::new.
+	 */
+	public void componentCreated(GUIComponent component)
+	{
+		if (components.contains(component))
+			throw new IllegalStateException("Don't add the same component twice!");
+		components.add(component);
+		callComponentAddedListeners(component);
+	}
+
+	/**
+	 * Removes the given component from the list of components and calls all componentRemovedListeners. Don't call this method from
+	 * application code as it is automatically called in GUIComponent::destroy.
+	 */
+	public void componentDestroyed(GUIComponent component)
+	{
+		if (!components.contains(component))
+			throw new IllegalStateException("Don't remove the same component twice!");
+		components.remove(component);
+		callComponentRemovedListeners(component);
+	}
+
+	/**
+	 * Adds the given component to the list of components and calls all componentAddedListeners. Don't call this method from application
+	 * code as it is automatically called in GUIComponent::new.
+	 */
+	public void wireCreated(GUIWire wire)
+	{
+		if (wires.contains(wire))
+			throw new IllegalStateException("Don't add the same wire twice!");
+		wires.add(wire);
+		callWireAddedListeners(wire);
+	}
+
+	/**
+	 * Removes the given component from the list of components and calls all componentRemovedListeners. Don't call this method from
+	 * application code as it is automatically called in GUIComponent::destroy.
+	 */
+	public void wireDestroyed(GUIWire wire)
+	{
+		if (!wires.contains(wire))
+			throw new IllegalStateException("Don't remove the same wire twice!");
+		wires.remove(wire);
+		callWireRemovedListeners(wire);
+	}
+
+	public List<GUIComponent> getComponents()
+	{
+		return componentsUnmodifiable;
+	}
+
+	public List<GUIWire> getWires()
+	{
+		return wiresUnmodifiable;
+	}
+
+	// @formatter:off
+	public void addComponentAddedListener     (Consumer<? super GUIComponent> listener){componentAddedListeners  .add   (listener);}
+	public void addComponentRemovedListener   (Consumer<? super GUIComponent> listener){componentRemovedListeners.add   (listener);}
+	public void addWireAddedListener          (Consumer<? super GUIWire     > listener){wireAddedListeners       .add   (listener);}
+	public void addWireRemovedListener        (Consumer<? super GUIWire     > listener){wireRemovedListeners     .add   (listener);}
+
+	public void removeComponentAddedListener  (Consumer<? super GUIComponent> listener){componentAddedListeners  .remove(listener);}
+	public void removeComponentRemovedListener(Consumer<? super GUIComponent> listener){componentRemovedListeners.remove(listener);}
+	public void removeWireAddedListener       (Consumer<? super GUIWire     > listener){wireAddedListeners       .remove(listener);}
+	public void removeWireRemovedListener     (Consumer<? super GUIWire     > listener){wireRemovedListeners     .remove(listener);}
+
+	private void callComponentAddedListeners  (GUIComponent c) {componentAddedListeners  .forEach(l -> l.accept(c));}
+	private void callComponentRemovedListeners(GUIComponent c) {componentRemovedListeners.forEach(l -> l.accept(c));}
+	private void callWireAddedListeners       (GUIWire w     ) {wireAddedListeners       .forEach(l -> l.accept(w));}
+	private void callWireRemovedListeners     (GUIWire w     ) {wireRemovedListeners     .forEach(l -> l.accept(w));}
+	// @formatter:on
+}
\ No newline at end of file