Merge branch 'develop' into bug/JAL-2510amendFeatures

[jalview.git] / src / jalview / appletgui / OverviewCanvas.java

diff --git a/src/jalview/appletgui/OverviewCanvas.java b/src/jalview/appletgui/OverviewCanvas.java
new file mode 100644 (file)
index 0000000..23e82df
--- /dev/null
+++ b/src/jalview/appletgui/OverviewCanvas.java
@@ -0,0 +1,167 @@
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
+package jalview.appletgui;
+
+import jalview.renderer.OverviewRenderer;
+import jalview.viewmodel.OverviewDimensions;
+
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Image;
+
+public class OverviewCanvas extends Component
+{
+  // This is set true if the alignment view changes whilst
+  // the overview is being calculated
+  private volatile boolean restart = false;
+
+  private volatile boolean updaterunning = false;
+
+  private OverviewDimensions od;
+
+  private Image miniMe;
+
+  private Image offscreen;
+
+  private AlignViewport av;
+
+  // Can set different properties in this seqCanvas than
+  // main visible SeqCanvas
+  private SequenceRenderer sr;
+
+  private jalview.renderer.seqfeatures.FeatureRenderer fr;
+
+  private Frame nullFrame;
+
+  public OverviewCanvas(OverviewDimensions overviewDims,
+          AlignViewport alignvp)
+  {
+    od = overviewDims;
+    av = alignvp;
+
+    nullFrame = new Frame();
+    nullFrame.addNotify();
+
+    sr = new SequenceRenderer(av);
+    sr.graphics = nullFrame.getGraphics();
+    sr.renderGaps = false;
+    sr.forOverview = true;
+    fr = new jalview.renderer.seqfeatures.FeatureRenderer(av);
+  }
+
+  /**
+   * Update the overview dimensions object used by the canvas (e.g. if we change
+   * from showing hidden columns to hiding them or vice versa)
+   * 
+   * @param overviewDims
+   */
+  public void resetOviewDims(OverviewDimensions overviewDims)
+  {
+    od = overviewDims;
+  }
+
+  /**
+   * Signals to drawing code that the associated alignment viewport has changed
+   * and a redraw will be required
+   */
+  public boolean restartDraw()
+  {
+    synchronized (this)
+    {
+      if (updaterunning)
+      {
+        restart = true;
+      }
+      else
+      {
+        updaterunning = true;
+      }
+      return restart;
+    }
+  }
+
+  public void draw(boolean showSequenceFeatures, boolean showAnnotation,
+          FeatureRenderer transferRenderer)
+  {
+    miniMe = null;
+
+    if (showSequenceFeatures)
+    {
+      fr.transferSettings(transferRenderer);
+    }
+
+    setPreferredSize(new Dimension(od.getWidth(), od.getHeight()));
+
+    OverviewRenderer or = new OverviewRenderer(sr, fr, od);
+    miniMe = nullFrame.createImage(od.getWidth(), od.getHeight());
+    offscreen = nullFrame.createImage(od.getWidth(), od.getHeight());
+
+    miniMe = or.draw(od.getRows(av.getAlignment()),
+            od.getColumns(av.getAlignment()));
+
+    Graphics mg = miniMe.getGraphics();
+
+    // checks for conservation annotation to make sure overview works for DNA
+    // too
+    if (showAnnotation)
+    {
+      mg.translate(0, od.getSequencesHeight());
+      or.drawGraph(mg, av.getAlignmentConservationAnnotation(),
+              av.getCharWidth(), od.getGraphHeight(),
+              od.getColumns(av.getAlignment()));
+      mg.translate(0, -od.getSequencesHeight());
+    }
+    System.gc();
+
+    if (restart)
+    {
+      restart = false;
+      draw(showSequenceFeatures, showAnnotation, transferRenderer);
+    }
+    else
+    {
+      updaterunning = false;
+    }
+  }
+
+  @Override
+  public void update(Graphics g)
+  {
+    paint(g);
+  }
+
+  @Override
+  public void paint(Graphics g)
+  {
+    Graphics og = offscreen.getGraphics();
+    if (miniMe != null)
+    {
+      og.drawImage(miniMe, 0, 0, this);
+      og.setColor(Color.red);
+      od.drawBox(og);
+      g.drawImage(offscreen, 0, 0, this);
+    }
+  }
+
+}