rewrite splash screen handler

Author: benfry

app/src/processing/app/ui/Splash.java

@@ -0,0 +1,125 @@
+package processing.app.ui;
+
+import processing.app.Platform;
+
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.MediaTracker;
+import java.awt.Toolkit;
+import javax.swing.JComponent;
+import javax.swing.JFrame;
+import java.io.File;
+
+
+/**
+ * Show a splash screen window. Loosely based on SplashWindow.java from
+ * Werner Randelshofer, but rewritten to use Swing because the java.awt
+ * version doesn't render properly on Windows.
+ */
+public class Splash extends JFrame {
+  static private Splash instance;
+  private Image image;
+
+
+  private boolean paintCalled = false;
+
+  private Splash(File imageFile, boolean hidpi) {
+    this.image =
+      Toolkit.getDefaultToolkit().createImage(imageFile.getAbsolutePath());
+
+    // Load the image
+    MediaTracker mt = new MediaTracker(this);
+    mt.addImage(image,0);
+    try {
+      mt.waitForID(0);
+    } catch(InterruptedException ie){}
+
+    // Abort on failure
+    if (mt.isErrorID(0)) {
+      setSize(0,0);
+      System.err.println("Warning: SplashWindow couldn't load splash image.");
+      synchronized(this) {
+        paintCalled = true;
+        notifyAll();
+      }
+    } else {
+      // Center the window on the screen
+      final int imgWidth = image.getWidth(this);
+      final int imgHeight = image.getHeight(this);
+      final int imgScale = hidpi ? 2 : 1;
+
+      setUndecorated(true);
+
+      JComponent comp = new JComponent() {
+        public void paintComponent(Graphics g) {
+          System.out.println("drawing " + getSize() + " " + Splash.this.getSize());
+          g.drawImage(image, 0, 0, imgWidth / imgScale, imgHeight / imgScale, this);
+        }
+
+        public Dimension getPreferredSize() {
+          return new Dimension(imgWidth / imgScale, imgHeight / imgScale);
+        }
+      };
+      comp.setSize(imgWidth, imgHeight);
+      setLayout(new FlowLayout());
+      getContentPane().add(comp);
+      pack();
+
+      setLocationRelativeTo(null);
+    }
+  }
+
+
+  /** Open a splash window using the specified image. */
+  static void showSplash(File imageFile, boolean hidpi) {
+    if (instance == null) {
+      instance = new Splash(imageFile, hidpi);
+      instance.setVisible(true);
+    }
+  }
+
+
+  /** Closes the splash window when finished. */
+  static void disposeSplash() {
+    if (instance != null) {
+      //instance.getOwner().dispose();
+      instance.dispose();
+      instance = null;
+    }
+  }
+
+
+  /**
+   * Invokes the main method of the provided class name.
+   * @param args the command line arguments
+   */
+  static void invokeMain(String className, String[] args) {
+    try {
+      Class.forName(className)
+        .getMethod("main", new Class[] {String[].class})
+        .invoke(null, new Object[] { args });
+
+    } catch (Exception e) {
+      InternalError error = new InternalError("Failed to invoke main method");
+      error.initCause(e);
+      throw error;
+    }
+  }
+
+
+  static public void main(String[] args) {
+    try {
+      final boolean hidpi = processing.app.ui.Toolkit.highResImages();
+      final String filename = "lib/about-" + (hidpi ? 2 : 1) + "x.png";
+      File splashFile = Platform.getContentFile(filename);
+      showSplash(splashFile, hidpi);
+      invokeMain("processing.app.Base", args);
+      disposeSplash();
+
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+  }
+}

build/build.xml

@@ -506,9 +506,11 @@
                copyright="© The Processing Foundation"
                shortVersion="${version}"
                version="${revision}"
-               mainClassName="processing.app.BaseSplash"
+               mainClassName="processing.app.ui.Splash"
                minimumSystemVersion="10.14.6">
 
+      <!-- mainClassName="processing.app.BaseSplash" -->
+
       <!-- The appbundler task needs a couple files (the Info.plist and
            anything else outside /jdk) from the full JDK, even though
            it's primarily copying over the JRE folder. -->