start an 'image settings' prefwindow-based dialog for settings several options on...

[mandelbrot.git] / xulapp / chrome / mandelbrot / content / mandelbrot.js

diff --git a/xulapp/chrome/mandelbrot/content/mandelbrot.js b/xulapp/chrome/mandelbrot/content/mandelbrot.js
index aab0f02b884861fc98ea39afac4be8a042c97c73..7762362591c4664798a8f9344df9865b91d59fae 100644 (file)
--- a/xulapp/chrome/mandelbrot/content/mandelbrot.js
+++ b/xulapp/chrome/mandelbrot/content/mandelbrot.js
@@ -69,10 +69,20 @@ function drawImage() {
 function drawLine(line, canvas, context, iterMax, algorithm) {
     let Cr_min = -2.0;
     let Cr_max = 1.0;
+    try {
+      Cr_min = gPref.getCharPref("mandelbrot.last_image.Cr_min");
+      Cr_max = gPref.getCharPref("mandelbrot.last_image.Cr_max");
+    }
+    catch (e) { }
     let Cr_scale = Cr_max - Cr_min;
 
     let Ci_min = -1.5;
     let Ci_max = 1.5;
+    try {
+      Cr_min = gPref.getCharPref("mandelbrot.last_image.Ci_min");
+      Cr_max = gPref.getCharPref("mandelbrot.last_image.Ci_max");
+    }
+    catch (e) { }
     let Ci_scale = Ci_max - Ci_min;
 
     let pixels = [];
@@ -283,8 +293,23 @@ function drawPoint(context, img_x, img_y, C, iterMax, algorithm) {
 /***** pure UI functions *****/
 
 function saveImage() {
-  // XXX: should call filepicker!
-  saveCanvas(document.getElementById("mbrotImage"), "/home/robert/temp/canvas-save.png")
+  const bundle = document.getElementById("mbrotBundle");
+  const nsIFilePicker = Components.interfaces.nsIFilePicker;
+  var fp = null;
+  try {
+    fp = Components.classes["@mozilla.org/filepicker;1"]
+                   .createInstance(nsIFilePicker);
+  } catch (e) {}
+  if (!fp) return;
+  var promptString = bundle.getString("savePrompt");
+  fp.init(window, promptString, nsIFilePicker.modeSave);
+  fp.appendFilter(bundle.getString("pngFilterName"), "*.png");
+  fp.defaultString = "mandelbrot.png";
+
+  var fpResult = fp.show();
+  if (fpResult != nsIFilePicker.returnCancel) {
+    saveCanvas(document.getElementById("mbrotImage"), fp.file);
+  }
 }
 
 function updateIterMenu() {
@@ -348,6 +373,10 @@ function setPalette(aPaletteID) {
   gColorPalette = getColorPalette(aPaletteID);
 }
 
+function imgSettings() {
+  window.openDialog("chrome://mandelbrot/content/image-settings.xul");
+}
+
 function updateDebugMenu() {
   var jitMenuItem = document.getElementById("jitEnabled");
   jitMenuItem.setAttribute("checked", gPref.getBoolPref("javascript.options.jit.chrome"));
@@ -388,21 +417,18 @@ function setAlgorithm(algoID) {
   gPref.setCharPref("mandelbrot.use_algorithm", algoID);
 }
 
-
 /***** helper functions from external sources *****/
 
-// function below is from from http://developer.mozilla.org/en/docs/Code_snippets:Canvas
-function saveCanvas(canvas, destFile) {
-  // convert string filepath to an nsIFile
-  var file = Components.classes["@mozilla.org/file/local;1"]
-                       .createInstance(Components.interfaces.nsILocalFile);
-  file.initWithPath(destFile);
-
+// function below is based on http://developer.mozilla.org/en/docs/Code_snippets:Canvas
+// custom modifications:
+//   - use "a"-prefix on function arguments
+//   - take an nsILocalFile as aDestFile argument
+//   - always do silent download
+function saveCanvas(aCanvas, aDestFile) {
   // create a data url from the canvas and then create URIs of the source and targets  
   var io = Components.classes["@mozilla.org/network/io-service;1"]
                      .getService(Components.interfaces.nsIIOService);
-  var source = io.newURI(canvas.toDataURL("image/png", ""), "UTF8", null);
-  var target = io.newFileURI(file);
+  var source = io.newURI(aCanvas.toDataURL("image/png", ""), "UTF8", null);
 
   // prepare to save the canvas data
   var persist = Components.classes["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
@@ -411,14 +437,8 @@ function saveCanvas(canvas, destFile) {
   persist.persistFlags = Components.interfaces.nsIWebBrowserPersist.PERSIST_FLAGS_REPLACE_EXISTING_FILES;
   persist.persistFlags |= Components.interfaces.nsIWebBrowserPersist.PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION;
 
-  // displays a download dialog (remove these 3 lines for silent download)
-  var xfer = Components.classes["@mozilla.org/transfer;1"]
-                       .createInstance(Components.interfaces.nsITransfer);
-  xfer.init(source, target, "", null, null, null, persist);
-  persist.progressListener = xfer;
-
   // save the canvas data to the file
-  persist.saveURI(source, null, null, null, null, file);
+  persist.saveURI(source, null, null, null, null, aDestFile);
 }
 
 // function below is from http://developer.mozilla.org/en/docs/How_to_Quit_a_XUL_Application