From b976747024097a7dcf3c05081133d9f9f809e869 Mon Sep 17 00:00:00 2001
From: "bjorn.olievier" <bjorn.olievier@6a861d04-ae47-0410-a6da-2d49beace72e>
Date: Mon, 7 Apr 2008 21:43:44 +0000
Subject: [PATCH] Extended Trackbar to get/set position Defined signal for
 trackbar position changes

---
 src/win32cpp/Trackbar.cpp | 21 +++++++++++++++++++++
 src/win32cpp/Trackbar.hpp | 14 +++++++++++++-
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/src/win32cpp/Trackbar.cpp b/src/win32cpp/Trackbar.cpp
index ab576a69e..96bc56cfc 100644
--- a/src/win32cpp/Trackbar.cpp
+++ b/src/win32cpp/Trackbar.cpp
@@ -53,6 +53,7 @@ using namespace win32cpp;
 , trackHeight(2)
 , thumbHeight(16)
 , tickFrequency(0)
+, position(0)
 {
 }
 
@@ -99,6 +100,14 @@ LRESULT     Trackbar::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
                     }
                 }
                 break;
+            case NM_RELEASEDCAPTURE:
+                {
+                    if (notifyHeader->hwndFrom == this->Handle())
+                    {
+                        this->OnRepositioned();
+                    }
+                }
+                break;
             }
         }
         break;
@@ -202,6 +211,12 @@ void        Trackbar::SetTickFrequency(short tickFrequency)
     this->SendMessage(TBM_SETTICFREQ, (WPARAM) this->tickFrequency, NULL);
 }
 
+void        Trackbar::OnRepositioned()
+{
+    this->position = this->SendMessage(TBM_GETPOS, 0, 0);
+    this->Repositioned();
+}
+
 void        Trackbar::SetThumbHeight(short thumbHeight)
 {
     this->thumbHeight = thumbHeight;
@@ -213,3 +228,9 @@ void        Trackbar::SetTrackHeight(short trackHeight)
     this->trackHeight = trackHeight;
     this->Redraw();
 }
+
+void        Trackbar::SetPosition(short position)
+{
+    this->position = position;
+    this->SendMessage(TBM_SETPOS, (WPARAM) true, (LPARAM) this->position);
+}
diff --git a/src/win32cpp/Trackbar.hpp b/src/win32cpp/Trackbar.hpp
index c30536c82..88a19d9b7 100644
--- a/src/win32cpp/Trackbar.hpp
+++ b/src/win32cpp/Trackbar.hpp
@@ -54,11 +54,20 @@ enum TrackbarOrientation
     /*! */ HorizontalTrack = TBS_HORZ
 };
 
+///\brief 
+///Event used when position on trackbar is changed
+///\see
+///Trackbar
+typedef sigslot::signal0<> TrackbarRepositionedEvent;
+
 ///\brief Trackbar allows the user to select a value from a range.
 class Trackbar: public Window
 {
 private:    typedef Window base;
 
+            ///\brief This event is emitted when the position of the slider is changed
+public:     TrackbarRepositionedEvent   Repositioned;
+
 public:     /*ctor*/            Trackbar(
                                     short minValue = 0, short maxValue = 100,
                                     TrackbarOrientation orientation = HorizontalTrack);
@@ -72,16 +81,19 @@ public:     void                SetTrackHeight(short trackHeight);
 public:     short               TrackHeight() { return this->trackHeight; }
 public:     void                SetThumbHeight(short thumbHeight);
 public:     short               ThumbHeight() { return this->thumbHeight; }
+public:     void                SetPosition(short position);
+public:     short               Position() const { return this->position; }
 
         // private api
 protected:  virtual HWND        Create(Window* parent);
 protected:  virtual void        OnEraseBackground(HDC hdc);
 protected:  virtual void        OnPaint();
 protected:  virtual void        OnCreated();
+protected:  virtual void        OnRepositioned();
 protected:  virtual LRESULT     OnCustomDraw(NMCUSTOMDRAW& customDraw);
 protected:  virtual LRESULT     WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
 
-protected:  short               minValue, maxValue, tickFrequency;
+protected:  short               minValue, maxValue, tickFrequency, position;
 protected:  short               trackHeight, thumbHeight;
 protected:  TrackbarOrientation   orientation;
 };