Status bar can change opacity of several cels (related to issue #225)

src/app/CMakeLists.txt

@@ -248,6 +248,7 @@ add_library(app-lib
   util/misc.cpp
   util/msk_file.cpp
   util/pic_file.cpp
+  util/range_utils.cpp
   util/render.cpp
   webserver.cpp
   widget_loader.cpp

src/app/ui/status_bar.cpp

@@ -24,6 +24,7 @@
 #include "app/commands/commands.h"
 #include "app/commands/params.h"
 #include "app/context_access.h"
+#include "app/document_range.h"
 #include "app/modules/editors.h"
 #include "app/modules/gfx.h"
 #include "app/modules/gui.h"
@@ -32,10 +33,13 @@
 #include "app/tools/tool.h"
 #include "app/ui/color_button.h"
 #include "app/ui/editor/editor.h"
+#include "app/ui/main_window.h"
 #include "app/ui/skin/skin_theme.h"
 #include "app/ui/status_bar.h"
+#include "app/ui/timeline.h"
 #include "app/ui_context.h"
 #include "app/util/misc.h"
+#include "app/util/range_utils.h"
 #include "base/bind.h"
 #include "gfx/size.h"
 #include "raster/cel.h"
@@ -574,14 +578,23 @@ static void slider_change_hook(Slider* slider)
 {
   try {
     ContextWriter writer(UIContext::instance());
-    Cel* cel = writer.cel();
-    if (cel) {
-      // Update the opacity
-      cel->setOpacity(slider->getValue());
 
-      // Update the editors
-      update_screen_for_document(writer.document());
+    // Clear of several frames is handled with RemoveCel command.
+    DocumentRange range = App::instance()->getMainWindow()->getTimeline()->range();
+    if (range.enabled()) {
+      for (Cel* cel : get_cels_in_range(writer.sprite(), range))
+        cel->setOpacity(slider->getValue());
     }
+    else {
+      Cel* cel = writer.cel();
+      if (cel) {
+        // Update the opacity
+        cel->setOpacity(slider->getValue());
+      }
+    }
+
+    // Update the editors
+    update_screen_for_document(writer.document());
   }
   catch (LockedDocumentException&) {
     // do nothing

src/app/util/range_utils.cpp

@@ -0,0 +1,56 @@
+/* Aseprite
+ * Copyright (C) 2001-2014  David Capello
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "app/context_access.h"
+#include "app/document.h"
+#include "app/document_range.h"
+#include "raster/layer.h"
+#include "raster/sprite.h"
+
+namespace app {
+
+using namespace raster;
+
+std::vector<Cel*> get_cels_in_range(Sprite* sprite, const DocumentRange& range)
+{
+  std::vector<Cel*> cels;
+
+  for (LayerIndex layerIdx = range.layerBegin(); layerIdx <= range.layerEnd(); ++layerIdx) {
+    Layer* layer = sprite->indexToLayer(layerIdx);
+    if (!layer->isImage())
+      continue;
+
+    LayerImage* layerImage = static_cast<LayerImage*>(layer);
+
+    for (FrameNumber frame = range.frameEnd(),
+           begin = range.frameBegin().previous();
+         frame != begin;
+         frame = frame.previous()) {
+      Cel* cel = layerImage->getCel(frame);
+      if (cel)
+        cels.push_back(cel);
+    }
+  }
+  return cels;
+}
+
+} // namespace app

src/app/util/range_utils.h

@@ -0,0 +1,36 @@
+/* Aseprite
+ * Copyright (C) 2001-2014  David Capello
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef APP_UTIL_RANGE_UTILS_H_INCLUDED
+#define APP_UTIL_RANGE_UTILS_H_INCLUDED
+#pragma once
+
+#include <vector>
+
+namespace raster {
+  class Sprite;
+}
+
+namespace app {
+  class DocumentRange;
+
+  std::vector<Cel*> get_cels_in_range(raster::Sprite* sprite, const DocumentRange& range);
+
+} // namespace app
+
+#endif