From 7e64832ec06e48711742329816f23c3429903a7a Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sat, 23 May 2015 23:42:32 +0300
Subject: If window with label is hidden then release text image.

This will reduce memore usage and not affect performance.
---
 src/gui/widgets/label.cpp | 18 ++++++++++++++++++
 src/gui/widgets/label.h   |  6 ++++++
 2 files changed, 24 insertions(+)

(limited to 'src/gui')

diff --git a/src/gui/widgets/label.cpp b/src/gui/widgets/label.cpp
index 65e7f86d0..e05a76c5d 100644
--- a/src/gui/widgets/label.cpp
+++ b/src/gui/widgets/label.cpp
@@ -76,6 +76,7 @@ int Label::mInstances = 0;
 
 Label::Label(const Widget2 *const widget) :
     Widget(widget),
+    WidgetListener(),
     ToolTipListener(),
     mCaption(),
     mTextChunk(),
@@ -89,6 +90,7 @@ Label::Label(const Widget2 *const widget) :
 Label::Label(const Widget2 *const widget,
              const std::string &caption) :
     Widget(widget),
+    WidgetListener(),
     ToolTipListener(),
     mCaption(caption),
     mTextChunk(),
@@ -107,6 +109,9 @@ Label::Label(const Widget2 *const widget,
 
 Label::~Label()
 {
+    if (mWindow)
+        mWindow->removeWidgetListener(this);
+
     if (gui)
         gui->removeDragged(this);
 
@@ -253,3 +258,16 @@ void Label::setCaption(const std::string& caption)
         mTextChanged = true;
     mCaption = caption;
 }
+
+void Label::setParent(Widget *widget)
+{
+    if (mWindow)
+        mWindow->addWidgetListener(this);
+    Widget::setParent(widget);
+}
+
+void Label::widgetHidden(const Event &event)
+{
+    mTextChanged = true;
+    mTextChunk.deleteImage();
+}
diff --git a/src/gui/widgets/label.h b/src/gui/widgets/label.h
index 9e82f0a5d..813248da8 100644
--- a/src/gui/widgets/label.h
+++ b/src/gui/widgets/label.h
@@ -70,6 +70,7 @@
 #include "gui/widgets/widget.h"
 
 #include "listeners/tooltiplistener.h"
+#include "listeners/widgetlistener.h"
 
 #include "localconsts.h"
 
@@ -82,6 +83,7 @@ class Skin;
  * \ingroup GUI
  */
 class Label final : public Widget,
+                    public WidgetListener,
                     public ToolTipListener
 {
     public:
@@ -156,6 +158,10 @@ class Label final : public Widget,
         Graphics::Alignment getAlignment() const
         { return mAlignment; }
 
+        void setParent(Widget *widget) override final;
+
+        void widgetHidden(const Event &event) override final;
+
         static Skin *mSkin;
 
         static int mInstances;
-- 
cgit v1.2.3-60-g2f50