Fix bug with save/load progress bar: cannot be edited now

The ui::Alert slider to show progress is read-only now.

src/ui/alert.cpp

@@ -60,6 +60,7 @@ void Alert::addProgress()
 {
   ASSERT(!m_progress);
   m_progress = new Slider(0, 100, 0);
+  m_progress->setReadOnly(true);
   m_progressPlaceholder->addChild(m_progress);
   m_progressPlaceholder->setVisible(true);
 }

src/ui/slider.cpp

@@ -28,11 +28,11 @@ static bool slider_press_left;
 
 Slider::Slider(int min, int max, int value)
   : Widget(kSliderWidget)
+  , m_min(min)
+  , m_max(max)
+  , m_value(MID(min, value, max))
+  , m_readOnly(false)
 {
-  m_min = min;
-  m_max = max;
-  m_value = MID(min, value, max);
-
   this->setFocusStop(true);
   initTheme();
 }
@@ -76,7 +76,7 @@ bool Slider::onProcessMessage(Message* msg)
       break;
 
     case kMouseDownMessage:
-      if (!isEnabled())
+      if (!isEnabled() || isReadOnly())
         return true;
 
       setSelected(true);
@@ -142,7 +142,7 @@ bool Slider::onProcessMessage(Message* msg)
       break;
 
     case kKeyDownMessage:
-      if (hasFocus()) {
+      if (hasFocus() && !isReadOnly()) {
         int min = m_min;
         int max = m_max;
         int value = m_value;
@@ -168,7 +168,7 @@ bool Slider::onProcessMessage(Message* msg)
       break;
 
     case kMouseWheelMessage:
-      if (isEnabled()) {
+      if (isEnabled() && !isReadOnly()) {
         int value = m_value
           + static_cast<MouseMessage*>(msg)->wheelDelta().x
           - static_cast<MouseMessage*>(msg)->wheelDelta().y;

src/ui/slider.h

@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2001-2013  David Capello
+// Copyright (C) 2001-2013, 2015  David Capello
 //
 // This file is released under the terms of the MIT license.
 // Read LICENSE.txt for more information.
@@ -13,8 +13,7 @@
 
 namespace ui {
 
-  class Slider : public Widget
-  {
+  class Slider : public Widget {
   public:
     Slider(int min, int max, int value);
 
@@ -25,6 +24,9 @@ namespace ui {
     void setRange(int min, int max);
     void setValue(int value);
 
+    bool isReadOnly() const { return m_readOnly; }
+    void setReadOnly(bool readOnly) { m_readOnly = readOnly; }
+
     void getSliderThemeInfo(int* min, int* max, int* value);
 
     // Signals
@@ -47,6 +49,7 @@ namespace ui {
     int m_min;
     int m_max;
     int m_value;
+    bool m_readOnly;
   };
 
 } // namespace ui