spek

commit f01ec84becf5f9d189e6031ac043fa4f54a5c5e8
parent 80b2a25f0253aecf64b549f1db4685fa90d60997
Author: Alexander Kojevnikov <alexander@kojevnikov.com>
Date:   Sun,  9 May 2010 13:09:52 +1000

Save spectrogram as a PNG image

Diffstat:
M
src/spek-spectrogram.vala
 | 
21
+++++++++++++++------
M
src/spek-window.vala
 | 
18
++++++++++++++++++

2 files changed, 33 insertions(+), 6 deletions(-)
diff --git a/src/spek-spectrogram.vala b/src/spek-spectrogram.vala
@@ -30,7 +30,7 @@ namespace Spek {
 
 		private ImageSurface image;
 		private ImageSurface palette;
-		private const int PADDING = 60;
+		private const int PADDING = 40;
 		private const int GAP = 10;
 		private const int RULER = 10;
 
@@ -51,6 +51,12 @@ namespace Spek {
 			start ();
 		}
 
+		public void save (string file_name) {
+			var surface = new ImageSurface (Format.RGB24, allocation.width, allocation.height);
+			draw (new Context (surface));
+			surface.write_to_png (file_name);
+		}
+
 		private void start () {
 			// The number of samples is the number of pixels available for the image.
 			// The number of bands is fixed, FFT results are very different for
@@ -84,15 +90,20 @@ namespace Spek {
 		}
 
 		private override bool expose_event (EventExpose event) {
-			double w = allocation.width;
-			double h = allocation.height;
-
 			var cr = cairo_create (this.window);
 
 			// Clip to the exposed area.
 			cr.rectangle (event.area.x, event.area.y, event.area.width, event.area.height);
 			cr.clip ();
 
+			draw (cr);
+			return true;
+		}
+
+		private void draw (Context cr) {
+			double w = allocation.width;
+			double h = allocation.height;
+
 			// Clean the background.
 			cr.set_source_rgb (0, 0, 0);
 			cr.paint ();
@@ -119,8 +130,6 @@ namespace Spek {
 			cr.set_source_surface (palette, 0, 0);
 			cr.paint ();
 			cr.identity_matrix ();
-
-			return true;
 		}
 
 		private void put_pixel (ImageSurface surface, int x, int y, uint32 color) {
diff --git a/src/spek-window.vala b/src/spek-window.vala
@@ -43,6 +43,13 @@ namespace Spek {
 			open.clicked.connect (on_open_clicked);
 			toolbar.insert (open, -1);
 
+			var save = new ToolButton.from_stock (STOCK_SAVE);
+			save.is_important = true;
+			save.add_accelerator (
+				"clicked", group, 'S', ModifierType.CONTROL_MASK, AccelFlags.VISIBLE);
+			save.clicked.connect (on_save_clicked);
+			toolbar.insert (save, -1);
+
 			toolbar.insert (new SeparatorToolItem (), -1);
 
 			var quit = new ToolButton.from_stock (STOCK_QUIT);
@@ -84,6 +91,17 @@ namespace Spek {
 			chooser.destroy ();
 		}
 
+		private void on_save_clicked () {
+			var chooser = new FileChooserDialog (
+				_("Save File"), this, FileChooserAction.SAVE,
+				STOCK_CANCEL, ResponseType.CANCEL,
+				STOCK_SAVE, ResponseType.ACCEPT, null);
+			if (chooser.run () == ResponseType.ACCEPT) {
+				spectrogram.save (chooser.get_filename ());
+			}
+			chooser.destroy ();
+		}
+
 		private void on_about_clicked () {
 			string[] authors = {
 				"Alexander Kojevnikov <alexander@kojevnikov.com>"