Code refactoring.

[sixth-3d.git] / src / main / java / eu / svjatoslav / sixth / e3d / gui / ViewPanel.java

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/gui/ViewPanel.java b/src/main/java/eu/svjatoslav/sixth/e3d/gui/ViewPanel.java
index 6fda153..b23bf5b 100755 (executable)
--- a/src/main/java/eu/svjatoslav/sixth/e3d/gui/ViewPanel.java
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/gui/ViewPanel.java
@@ -9,9 +9,9 @@
 
 package eu.svjatoslav.sixth.e3d.gui;
 
-import eu.svjatoslav.sixth.e3d.gui.humaninput.KeyboardFocusTracker;
+import eu.svjatoslav.sixth.e3d.gui.humaninput.KeyboardFocusStack;
 import eu.svjatoslav.sixth.e3d.gui.humaninput.MouseInteractionController;
-import eu.svjatoslav.sixth.e3d.gui.humaninput.UserInputTracker;
+import eu.svjatoslav.sixth.e3d.gui.humaninput.HIDInputTracker;
 import eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection;
 
 import javax.swing.*;
@@ -27,9 +27,9 @@ import java.util.Timer;
  */
 public class ViewPanel extends JPanel implements ComponentListener {
     private static final long serialVersionUID = 1683277888885045387L;
-    private final UserInputTracker userInputTracker = new UserInputTracker(this);
-    private final KeyboardFocusTracker keyboardFocusTracker = new KeyboardFocusTracker(
-            this);
+    public Color backgroundColor = Color.BLACK;
+    private final HIDInputTracker HIDInputTracker = new HIDInputTracker(this);
+    private final KeyboardFocusStack keyboardFocusStack = new KeyboardFocusStack(this);
     private final Avatar avatar = new Avatar();
     private final ShapeCollection rootShapeCollection = new ShapeCollection();
     private final List<ViewRenderListener> viewRenderListeners = new ArrayList<>();
@@ -56,7 +56,7 @@ public class ViewPanel extends JPanel implements ComponentListener {
     private boolean viewRepaintNeeded = true;
     public ViewPanel() {
         viewRenderListeners.add(avatar);
-        viewRenderListeners.add(userInputTracker);
+        viewRenderListeners.add(HIDInputTracker);
 
         initializePanelLayout();
 
@@ -69,16 +69,16 @@ public class ViewPanel extends JPanel implements ComponentListener {
         return avatar;
     }
 
-    public KeyboardFocusTracker getKeyboardFocusTracker() {
-        return keyboardFocusTracker;
+    public KeyboardFocusStack getKeyboardFocusStack() {
+        return keyboardFocusStack;
     }
 
     public ShapeCollection getRootShapeCollection() {
         return rootShapeCollection;
     }
 
-    public UserInputTracker getUserInputTracker() {
-        return userInputTracker;
+    public HIDInputTracker getHIDInputTracker() {
+        return HIDInputTracker;
     }
 
     public void addViewUpdateListener(final ViewRenderListener listener) {
@@ -120,10 +120,6 @@ public class ViewPanel extends JPanel implements ComponentListener {
         return new java.awt.Dimension(640, 480);
     }
 
-    public RenderingContext getRenderBuffer() {
-        return renderingContext;
-    }
-
     public RenderingContext getRenderingContext() {
         return renderingContext;
     }
@@ -163,29 +159,31 @@ public class ViewPanel extends JPanel implements ComponentListener {
         requestFocusInWindow();
     }
 
-    public void renderFrame() {
-        // build new render buffer if needed, this happens when window was just
-        // created or resized
-        if ((renderingContext == null)
-                || (renderingContext.width != getWidth())
-                || (renderingContext.height != getHeight()))
+    private void renderFrame() {
+        if (isNewRenderingContextNeeded())
             renderingContext = new RenderingContext(getWidth(), getHeight());
 
-        // clear drawing area
-        {
-            renderingContext.graphics.setColor(Color.BLACK);
-            renderingContext.graphics.fillRect(0, 0, getWidth(), getHeight());
-        }
-
         // paint root geometry collection to the offscreen render buffer
+        clearCanvas();
         rootShapeCollection.paint(this, renderingContext);
 
-        // draw rendered offscreen image to visible screen
+        // draw rendered offscreen buffer to visible screen
         final Graphics graphics = getGraphics();
         if (graphics != null)
             graphics.drawImage(renderingContext.bufferedImage, 0, 0, null);
     }
 
+    private void clearCanvas() {
+        renderingContext.graphics.setColor(backgroundColor);
+        renderingContext.graphics.fillRect(0, 0, getWidth(), getHeight());
+    }
+
+    private boolean isNewRenderingContextNeeded() {
+        return (renderingContext == null)
+                || (renderingContext.width != getWidth())
+                || (renderingContext.height != getHeight());
+    }
+
     /**
      * Calling this methods tells 3D engine that current 3D view needs to be
      * repainted on first opportunity.
@@ -233,42 +231,47 @@ public class ViewPanel extends JPanel implements ComponentListener {
      * It tells view to update itself. View can decide if actual re-rendering of
      * graphics is needed.
      */
-    public void updateView() {
+    void updateView() {
         if (renderingContext != null) {
             renderingContext.mouseClick = null;
             renderingContext.clickedItem = null;
         }
 
-        // compute time passed since last view update
-        final long currentTime = System.currentTimeMillis();
+        final int millisecondsPassedSinceLastUpdate = getMillisecondsPassedSinceLastUpdate();
 
-        if (lastUpdateMillis == 0) {
-            lastUpdateMillis = currentTime;
-            return;
+        boolean renderFrame = notifyViewRenderListeners(millisecondsPassedSinceLastUpdate);
+
+        if (viewRepaintNeeded) {
+            viewRepaintNeeded = false;
+            renderFrame = true;
         }
 
-        final int millisecondsPassedSinceLastUpdate = (int) (currentTime - lastUpdateMillis);
-        lastUpdateMillis = currentTime;
+        // abort rendering if window size is invalid
+        if ((getWidth() <= 0) || (getHeight() <= 0))
+            renderFrame = false;
 
-        // notify update listeners
-        boolean reRenderFrame = false;
+        if (renderFrame) {
+            renderFrame();
+            handleDetectedComponentMouseEvents();
+        }
+    }
 
+    private boolean notifyViewRenderListeners(int millisecondsPassedSinceLastUpdate) {
+        boolean reRenderFrame = false;
         for (final ViewRenderListener listener : viewRenderListeners)
             if (listener.beforeRender(this, millisecondsPassedSinceLastUpdate))
                 reRenderFrame = true;
+        return reRenderFrame;
+    }
 
-        // abort rendering if window size is invalid
-        if ((getWidth() <= 0) || (getHeight() <= 0))
-            return;
+    private int getMillisecondsPassedSinceLastUpdate() {
+        final long currentTime = System.currentTimeMillis();
 
-        if (viewRepaintNeeded) {
-            viewRepaintNeeded = false;
-            reRenderFrame = true;
-        }
+        if (lastUpdateMillis == 0)
+            lastUpdateMillis = currentTime;
 
-        if (reRenderFrame) {
-            renderFrame();
-            handleDetectedComponentMouseEvents();
-        }
+        final int millisecondsPassedSinceLastUpdate = (int) (currentTime - lastUpdateMillis);
+        lastUpdateMillis = currentTime;
+        return millisecondsPassedSinceLastUpdate;
     }
 }