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/*-----------------------------------------------------------------------------------*/
/* INRIA 2005 */
/* Allan CORNET */
/*-----------------------------------------------------------------------------------*/
#include "Transparency.h"
/*-----------------------------------------------------------------------------------*/
#ifndef WS_EX_LAYERED
#define WS_EX_LAYERED 0x00080000
#endif
#ifndef LWA_COLORKEY
#define LWA_COLORKEY 0x00000001
#endif
#ifndef LWA_ALPHA
#define LWA_ALPHA 0x00000002
#endif
/*-----------------------------------------------------------------------------------*/
typedef BOOL (WINAPI *SLWA_FUNC)(HWND hwnd,COLORREF crKey,BYTE bAlpha,DWORD dwFlags);
SLWA_FUNC SetLayeredWindowAttributes;
/*-----------------------------------------------------------------------------------*/
static BOOL LoadUser32DLL=FALSE;
static int CurrentAlphaLevel=255;
static BOOL TransparencyON=FALSE;
static HMODULE hUser32=NULL;
/*-----------------------------------------------------------------------------------*/
extern LPTW GetTextWinScilab(void);
/*-----------------------------------------------------------------------------------*/
BOOL IsEnableTransparencyMode(void)
{
return TransparencyON;
}
/*-----------------------------------------------------------------------------------*/
BOOL ActivateTransparencyMode(HWND hWnd)
{
BOOL bOK=FALSE;
int OS=GetOSVersion();
if ( (OS!=OS_WIN32_WINDOWS_NT_3_51) &&
(OS!=OS_WIN32_WINDOWS_NT_4_0) &&
(OS!=OS_WIN32_WINDOWS_95) &&
(OS!=OS_WIN32_WINDOWS_98) &&
(OS!=OS_WIN32_WINDOWS_Me) )
{
if (TransparencyON) return FALSE;
if (LoadUser32DLL==FALSE)
{
hUser32 = GetModuleHandle("USER32.DLL");
LoadUser32DLL=TRUE;
}
if (!hUser32) return FALSE;
SetWindowLong(hWnd, GWL_EXSTYLE,GetWindowLong(hWnd, GWL_EXSTYLE) | WS_EX_LAYERED);
SetLayeredWindowAttributes = (SLWA_FUNC)GetProcAddress(hUser32, "SetLayeredWindowAttributes");
TransparencyON=TRUE;
bOK=TRUE;
}
return bOK;
}
/*-----------------------------------------------------------------------------------*/
BOOL DisableTransparencyMode(HWND hWnd)
{
BOOL bOK=FALSE;
int OS=GetOSVersion();
if ( (OS!=OS_WIN32_WINDOWS_NT_3_51) &&
(OS!=OS_WIN32_WINDOWS_NT_4_0) &&
(OS!=OS_WIN32_WINDOWS_95) &&
(OS!=OS_WIN32_WINDOWS_98) &&
(OS!=OS_WIN32_WINDOWS_Me) )
{
SetWindowLong(hWnd, GWL_EXSTYLE,CS_HREDRAW | CS_VREDRAW);
CurrentAlphaLevel=255;
TransparencyON=FALSE;
bOK=TRUE;
}
return bOK;
}
/*-----------------------------------------------------------------------------------*/
void ScilabFxFadeOut(void)
{
LPTW lptw=GetTextWinScilab();
int i=0;
int OS=GetOSVersion();
if ( (OS!=OS_WIN32_WINDOWS_NT_3_51) &&
(OS!=OS_WIN32_WINDOWS_NT_4_0) &&
(OS!=OS_WIN32_WINDOWS_95) &&
(OS!=OS_WIN32_WINDOWS_98) &&
(OS!=OS_WIN32_WINDOWS_Me) )
{
for (i=GetCurrentAlphaLevel();i>=0;i=i-16)
{
SetCurrentAlphaLevel(lptw->hWndParent ,i);
SetCurrentAlphaLevel(lptw->hWndText ,i);
}
}
}
/*-----------------------------------------------------------------------------------*/
int GetCurrentAlphaLevel(void)
{
return CurrentAlphaLevel;
}
/*-----------------------------------------------------------------------------------*/
void SetCurrentAlphaLevel(HWND hWnd ,int Alpha)
{
int OS=GetOSVersion();
if ( (OS!=OS_WIN32_WINDOWS_NT_3_51) &&
(OS!=OS_WIN32_WINDOWS_NT_4_0) &&
(OS!=OS_WIN32_WINDOWS_95) &&
(OS!=OS_WIN32_WINDOWS_98) &&
(OS!=OS_WIN32_WINDOWS_Me) )
{
if ( (Alpha>=0) && (Alpha<=255) )
{
SetLayeredWindowAttributes(hWnd, (COLORREF)NULL,CurrentAlphaLevel, LWA_ALPHA);
}
CurrentAlphaLevel=Alpha;
}
}
/*-----------------------------------------------------------------------------------*/
BOOL IncreaseAlphaLevel(void)
{
BOOL bOK=FALSE;
LPTW lptw=GetTextWinScilab();
int Alpha=GetCurrentAlphaLevel();
if (Alpha==255)
{
DisableTransparencyMode(lptw->hWndParent);
DisableTransparencyMode(lptw->hWndText);
DragAcceptFiles (lptw->hWndParent, TRUE);
InvalidateRect(lptw->hWndParent,NULL,TRUE);
InvalidateRect(lptw->hWndText,NULL,TRUE);
}
else
{
if (Alpha<255)
{
SetCurrentAlphaLevel(lptw->hWndParent ,Alpha++);
SetCurrentAlphaLevel(lptw->hWndText ,Alpha++);
if (Alpha>255) Alpha=255;
}
}
return bOK;
}
/*-----------------------------------------------------------------------------------*/
BOOL DecreaseAlphaLevel(void)
{
BOOL bOK=FALSE;
LPTW lptw=GetTextWinScilab();
int Alpha=GetCurrentAlphaLevel();
if (Alpha<0) Alpha=0;
else
{
SetCurrentAlphaLevel(lptw->hWndParent ,Alpha--);
SetCurrentAlphaLevel(lptw->hWndText ,Alpha--);
}
return bOK;
}
/*-----------------------------------------------------------------------------------*/
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