+// get the standard colour map for some standard colours - see comment in this
+// function to understand why is it needed and when should it be used
+//
+// it returns a wxCOLORMAP (can't use COLORMAP itself here as comctl32.dll
+// might be not included/available) array of size wxSTD_COLOUR_MAX
+//
+// NB: if you change these colours, update wxBITMAP_STD_COLOURS in the
+// resources as well: it must have the same number of pixels!
+enum wxSTD_COLOUR
+{
+ wxSTD_COL_BTNTEXT,
+ wxSTD_COL_BTNSHADOW,
+ wxSTD_COL_BTNFACE,
+ wxSTD_COL_BTNHIGHLIGHT,
+ wxSTD_COL_MAX
+};
+
+struct WXDLLEXPORT wxCOLORMAP
+{
+ COLORREF from, to;
+};
+
+// this function is implemented in src/msw/window.cpp
+extern wxCOLORMAP *wxGetStdColourMap();
+
+// create a wxRect from Windows RECT
+inline wxRect wxRectFromRECT(const RECT& rc)
+{
+ return wxRect(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top);
+}
+
+// copy Windows RECT to our wxRect
+inline void wxCopyRECTToRect(const RECT& rc, wxRect& rect)
+{
+ rect = wxRectFromRECT(rc);
+}
+
+// and vice versa
+inline void wxCopyRectToRECT(const wxRect& rect, RECT& rc)
+{
+ // note that we don't use wxRect::GetRight() as it is one of compared to
+ // wxRectFromRECT() above
+ rc.top = rect.y;
+ rc.left = rect.x;
+ rc.right = rect.x + rect.width;
+ rc.bottom = rect.y + rect.height;
+}
+
+// translations between HIMETRIC units (which OLE likes) and pixels (which are
+// liked by all the others) - implemented in msw/utilsexc.cpp
+extern void HIMETRICToPixel(LONG *x, LONG *y);
+extern void PixelToHIMETRIC(LONG *x, LONG *y);
+
+// Windows convention of the mask is opposed to the wxWidgets one, so we need
+// to invert the mask each time we pass one/get one to/from Windows
+extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w = 0, int h = 0);
+
+// Creates an icon or cursor depending from a bitmap
+//
+// The bitmap must be valid and it should have a mask. If it doesn't, a default
+// mask is created using light grey as the transparent colour.
+extern HICON wxBitmapToHICON(const wxBitmap& bmp);
+
+// Same requirments as above apply and the bitmap must also have the correct
+// size.
+extern
+HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY);
+
+// get (x, y) from DWORD - notice that HI/LOWORD can *not* be used because they
+// will fail on system with multiple monitors where the coords may be negative
+//
+// these macros are standard now (Win98) but some older headers don't have them
+#ifndef GET_X_LPARAM
+ #define GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))
+ #define GET_Y_LPARAM(lp) ((int)(short)HIWORD(lp))
+#endif // GET_X_LPARAM
+
+// get the current state of SHIFT/CTRL keys
+inline bool wxIsShiftDown()
+{
+// return (::GetKeyState(VK_SHIFT) & 0x100) != 0;
+ // Returns different negative values on WinME and WinNT,
+ // so simply test for negative value.
+ return ::GetKeyState(VK_SHIFT) < 0;
+}
+
+inline bool wxIsCtrlDown()
+{
+// return (::GetKeyState(VK_CONTROL) & 0x100) != 0;
+ // Returns different negative values on WinME and WinNT,
+ // so simply test for negative value.
+ return ::GetKeyState(VK_CONTROL) < 0;
+}
+
+// wrapper around GetWindowRect() and GetClientRect() APIs doing error checking
+// for Win32
+inline RECT wxGetWindowRect(HWND hwnd)
+{
+ RECT rect;
+
+ if ( !::GetWindowRect(hwnd, &rect) )
+ {
+ wxLogLastError(_T("GetWindowRect"));
+ }
+
+ return rect;
+}
+
+inline RECT wxGetClientRect(HWND hwnd)
+{
+ RECT rect;
+
+ if ( !::GetClientRect(hwnd, &rect) )
+ {
+ wxLogLastError(_T("GetClientRect"));
+ }
+
+ return rect;
+}
+
+// ---------------------------------------------------------------------------
+// small helper classes
+// ---------------------------------------------------------------------------
+
+// a template to make initializing Windows styructs less painful: it zeroes all
+// the struct fields and also sets cbSize member to the correct value (and so
+// can be only used with structures which have this member...)
+template <class T>
+struct WinStruct : public T
+{
+ WinStruct()
+ {
+ ::ZeroMemory(this, sizeof(T));
+
+ // explicit qualification is required here for this to be valid C++
+ this->cbSize = sizeof(T);
+ }
+};
+
+
+// create an instance of this class and use it as the HDC for screen, will
+// automatically release the DC going out of scope
+class ScreenHDC
+{
+public:
+ ScreenHDC() { m_hdc = ::GetDC(NULL); }
+ ~ScreenHDC() { ::ReleaseDC(NULL, m_hdc); }
+
+ operator HDC() const { return m_hdc; }
+
+private:
+ HDC m_hdc;
+
+ DECLARE_NO_COPY_CLASS(ScreenHDC)
+};
+
+// the same as ScreenHDC but for window DCs
+class WindowHDC
+{
+public:
+ WindowHDC(HWND hwnd) { m_hdc = ::GetDC(m_hwnd = hwnd); }
+ ~WindowHDC() { ::ReleaseDC(m_hwnd, m_hdc); }
+
+ operator HDC() const { return m_hdc; }
+
+private:
+ HWND m_hwnd;
+ HDC m_hdc;
+
+ DECLARE_NO_COPY_CLASS(WindowHDC)
+};
+
+// the same as ScreenHDC but for memory DCs: creates the HDC compatible with
+// the given one (screen by default) in ctor and destroys it in dtor
+class MemoryHDC
+{
+public:
+ MemoryHDC(HDC hdc = 0) { m_hdc = ::CreateCompatibleDC(hdc); }
+ ~MemoryHDC() { ::DeleteDC(m_hdc); }
+
+ operator HDC() const { return m_hdc; }
+
+private:
+ HDC m_hdc;
+
+ DECLARE_NO_COPY_CLASS(MemoryHDC)
+};
+
+// a class which selects a GDI object into a DC in its ctor and deselects in
+// dtor
+class SelectInHDC
+{
+public:
+ SelectInHDC(HDC hdc, HGDIOBJ hgdiobj) : m_hdc(hdc)
+ { m_hgdiobj = ::SelectObject(hdc, hgdiobj); }
+
+ ~SelectInHDC() { ::SelectObject(m_hdc, m_hgdiobj); }
+
+ // return true if the object was successfully selected
+ operator bool() const { return m_hgdiobj != 0; }
+
+private:
+ HDC m_hdc;
+ HGDIOBJ m_hgdiobj;
+
+ DECLARE_NO_COPY_CLASS(SelectInHDC)
+};
+
+// a class which cleans up any GDI object
+class AutoGDIObject
+{
+protected:
+ AutoGDIObject(HGDIOBJ gdiobj) : m_gdiobj(gdiobj) { }
+ ~AutoGDIObject() { if ( m_gdiobj ) ::DeleteObject(m_gdiobj); }
+
+ HGDIOBJ GetObject() const { return m_gdiobj; }
+
+private:
+ HGDIOBJ m_gdiobj;
+};
+
+// a class for temporary bitmaps
+class CompatibleBitmap : private AutoGDIObject
+{
+public:
+ CompatibleBitmap(HDC hdc, int w, int h)
+ : AutoGDIObject(::CreateCompatibleBitmap(hdc, w, h))
+ {
+ }
+
+ operator HBITMAP() const { return (HBITMAP)GetObject(); }
+};
+
+// class automatically destroys the region object
+class AutoHRGN : private AutoGDIObject
+{
+public:
+ AutoHRGN(HRGN hrgn) : AutoGDIObject(hrgn) { }
+
+ operator HRGN() const { return (HRGN)GetObject(); }
+};
+
+// class sets the specified clipping region during its life time
+class HDCClipper
+{
+public:
+ HDCClipper(HDC hdc, HRGN hrgn)
+ : m_hdc(hdc)
+ {
+ if ( !::SelectClipRgn(hdc, hrgn) )
+ wxLogLastError(_T("SelectClipRgn"));
+ }
+
+ ~HDCClipper()
+ {
+ ::SelectClipRgn(m_hdc, NULL);
+ }
+
+private:
+ HDC m_hdc;
+
+ DECLARE_NO_COPY_CLASS(HDCClipper)
+};
+
+// when working with global pointers (which is unfortunately still necessary
+// sometimes, e.g. for clipboard) it is important to unlock them exactly as
+// many times as we lock them which just asks for using a "smart lock" class
+class GlobalPtr
+{
+public:
+ GlobalPtr(HGLOBAL hGlobal) : m_hGlobal(hGlobal)
+ {
+ m_ptr = GlobalLock(hGlobal);
+ if ( !m_ptr )
+ {
+ wxLogLastError(_T("GlobalLock"));
+ }
+ }
+
+ ~GlobalPtr()
+ {
+ if ( !GlobalUnlock(m_hGlobal) )
+ {
+#ifdef __WXDEBUG__
+ // this might happen simply because the block became unlocked
+ DWORD dwLastError = ::GetLastError();
+ if ( dwLastError != NO_ERROR )
+ {
+ wxLogApiError(_T("GlobalUnlock"), dwLastError);
+ }
+#endif // __WXDEBUG__
+ }
+ }
+
+ operator void *() const { return m_ptr; }
+
+private:
+ HGLOBAL m_hGlobal;
+ void *m_ptr;
+
+ DECLARE_NO_COPY_CLASS(GlobalPtr)
+};
+
+// register the class when it is first needed and unregister it in dtor
+class ClassRegistrar
+{
+public:
+ // ctor doesn't register the class, call Initialize() for this
+ ClassRegistrar() { m_registered = -1; }
+
+ // return true if the class is already registered
+ bool IsInitialized() const { return m_registered != -1; }
+
+ // return true if the class had been already registered
+ bool IsRegistered() const { return m_registered == 1; }
+
+ // try to register the class if not done yet, return true on success
+ bool Register(const WNDCLASS& wc)
+ {
+ // we should only be called if we hadn't been initialized yet
+ wxASSERT_MSG( m_registered == -1,
+ _T("calling ClassRegistrar::Register() twice?") );
+
+ m_registered = ::RegisterClass(&wc) ? 1 : 0;
+ if ( !IsRegistered() )
+ {
+ wxLogLastError(_T("RegisterClassEx()"));
+ }
+ else
+ {
+ m_clsname = wc.lpszClassName;
+ }
+
+ return m_registered == 1;
+ }
+
+ // get the name of the registered class (returns empty string if not
+ // registered)
+ const wxString& GetName() const { return m_clsname; }
+
+ // unregister the class if it had been registered
+ ~ClassRegistrar()
+ {
+ if ( IsRegistered() )
+ {
+ if ( !::UnregisterClass(m_clsname, wxhInstance) )
+ {
+ wxLogLastError(_T("UnregisterClass"));
+ }
+ }
+ }
+
+private:
+ // initial value is -1 which means that we hadn't tried registering the
+ // class yet, it becomes true or false (1 or 0) when Initialize() is called
+ int m_registered;
+
+ // the name of the class, only non empty if it had been registered
+ wxString m_clsname;
+};
+
projects / wxWidgets.git / blobdiff