From 7dcc0072f14f498c9e2875d269f4eb3fd1b5c67d Mon Sep 17 00:00:00 2001
From: David Capello <davidcapello@gmail.com>
Date: Wed, 6 Dec 2017 14:44:40 -0300
Subject: [PATCH] Add SwitchNonactiveLayersOpacity command (fix #1515)

This is a temporal solution but it's good enough for an experimental
feature.
---
 data/strings/en.ini          |  1 +
 src/app/ui/editor/editor.cpp | 28 ++++++++++++++++++++++++++++
 src/app/ui/editor/editor.h   |  2 ++
 src/app/ui/main_window.cpp   |  2 ++
 4 files changed, 33 insertions(+)

diff --git a/data/strings/en.ini b/data/strings/en.ini
index 19cda74a7..6d56f3e72 100644
--- a/data/strings/en.ini
+++ b/data/strings/en.ini
@@ -370,6 +370,7 @@ SnapToGrid = Snap to Grid
 SpriteProperties = Sprite Properties
 SpriteSize = Sprite Size
 SwitchColors = Switch Colors
+SwitchNonactiveLayersOpacity = Switch Nonactive Layers Opacity
 SymmetryMode = Symmetry Mode
 TiledMode = Tiled Mode
 Timeline = Switch Timeline
diff --git a/src/app/ui/editor/editor.cpp b/src/app/ui/editor/editor.cpp
index b0ace85e8..22187a022 100644
--- a/src/app/ui/editor/editor.cpp
+++ b/src/app/ui/editor/editor.cpp
@@ -16,7 +16,9 @@
 #include "app/color_utils.h"
 #include "app/commands/commands.h"
 #include "app/commands/params.h"
+#include "app/commands/quick_command.h"
 #include "app/console.h"
+#include "app/i18n/strings.h"
 #include "app/ini_file.h"
 #include "app/modules/editors.h"
 #include "app/modules/gfx.h"
@@ -2485,4 +2487,30 @@ void Editor::updateAutoCelGuides(ui::Message* msg)
     invalidate();
 }
 
+// static
+void Editor::registerCommands()
+{
+  Commands::instance()
+    ->add(
+      new QuickCommand(
+        CommandId::SwitchNonactiveLayersOpacity(),
+        []{
+          static int oldValue = -1;
+          auto& option = Preferences::instance().experimental.nonactiveLayersOpacity;
+          if (oldValue == -1) {
+            oldValue = option();
+            if (option() == 255)
+              option(128);
+            else
+              option(255);
+          }
+          else {
+            const int newValue = oldValue;
+            oldValue = option();
+            option(newValue);
+          }
+          app_refresh_screen();
+        }));
+}
+
 } // namespace app
diff --git a/src/app/ui/editor/editor.h b/src/app/ui/editor/editor.h
index a69b46be6..a9b9222c6 100644
--- a/src/app/ui/editor/editor.h
+++ b/src/app/ui/editor/editor.h
@@ -269,6 +269,8 @@ namespace app {
     // freehand tool is pressed.
     bool startStraightLineWithFreehandTool(const ui::MouseMessage* msg);
 
+    static void registerCommands();
+
   protected:
     bool onProcessMessage(ui::Message* msg) override;
     void onSizeHint(ui::SizeHintEvent& ev) override;
diff --git a/src/app/ui/main_window.cpp b/src/app/ui/main_window.cpp
index b91033880..51e026236 100644
--- a/src/app/ui/main_window.cpp
+++ b/src/app/ui/main_window.cpp
@@ -101,6 +101,8 @@ MainWindow::MainWindow()
   m_previewEditor = new PreviewEditorWindow();
   m_timeline = new Timeline();
 
+  Editor::registerCommands();
+
   m_workspace->setTabsBar(m_tabsBar);
   m_workspace->ActiveViewChanged.connect(&MainWindow::onActiveViewChange, this);