reactos/base/applications/calc/theme.c
Carlo-Bramini 0b107f2e30
[CALC] Add theming support, requires Windows XP or later. CORE-13343
- Fix errors if a theme api is missing.
- Add callback to functions for drawing themed transparent background.
- Fix drawing glitch when theming is applied.
- Redraw on theme change: automatically redraw the window if the
  theme is changed while the application is active.
- Colours are now declared though RGB() macro.
- Removed safe DS_SHELLFONT declaration.
2019-03-18 01:34:02 +01:00

127 lines
3.3 KiB
C

/*
* ReactOS Calc (Theming support)
*
* Copyright 2007-2017, Carlo Bramini
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "calc.h"
#define GET_CB(name) \
calc_##name = (type_##name)GetProcAddress(hUxTheme, #name); \
if (calc_##name == NULL) calc_##name = dummy_##name;
static HTHEME WINAPI
dummy_OpenThemeData(HWND hwnd, const WCHAR *pszClassList);
static HRESULT WINAPI
dummy_CloseThemeData(HTHEME hTheme);
static HRESULT WINAPI
dummy_DrawThemeBackground(HTHEME hTheme, HDC hdc, int iPartId, int iStateId,
const RECT *prc, const RECT *prcClip);
static BOOL WINAPI
dummy_IsAppThemed(void);
static BOOL WINAPI
dummy_IsThemeActive(void);
static BOOL WINAPI
dummy_IsThemeBackgroundPartiallyTransparent(HTHEME hTheme, int iPartId, int iStateId);
static HRESULT WINAPI
dummy_DrawThemeParentBackground(HWND hWnd, HDC hdc, RECT *prc);
type_OpenThemeData calc_OpenThemeData = dummy_OpenThemeData;
type_CloseThemeData calc_CloseThemeData = dummy_CloseThemeData;
type_DrawThemeBackground calc_DrawThemeBackground = dummy_DrawThemeBackground;
type_IsAppThemed calc_IsAppThemed = dummy_IsAppThemed;
type_IsThemeActive calc_IsThemeActive = dummy_IsThemeActive;
type_IsThemeBackgroundPartiallyTransparent calc_IsThemeBackgroundPartiallyTransparent = \
dummy_IsThemeBackgroundPartiallyTransparent;
type_DrawThemeParentBackground calc_DrawThemeParentBackground = \
dummy_DrawThemeParentBackground;
static HMODULE hUxTheme;
static HTHEME WINAPI
dummy_OpenThemeData(HWND hwnd, const WCHAR* pszClassList)
{
return NULL;
}
static HRESULT WINAPI
dummy_CloseThemeData(HTHEME hTheme)
{
return E_NOTIMPL;
}
static HRESULT WINAPI
dummy_DrawThemeBackground(HTHEME hTheme, HDC hdc, int iPartId, int iStateId,
const RECT* prc, const RECT* prcClip)
{
return E_NOTIMPL;
}
static BOOL WINAPI
dummy_IsAppThemed(void)
{
return FALSE;
}
static BOOL WINAPI
dummy_IsThemeActive(void)
{
return FALSE;
}
static BOOL WINAPI
dummy_IsThemeBackgroundPartiallyTransparent(HTHEME hTheme, int iPartId, int iStateId)
{
return FALSE;
}
static HRESULT WINAPI
dummy_DrawThemeParentBackground(HWND hWnd, HDC hdc, RECT *prc)
{
return E_NOTIMPL;
}
void Theme_Start(HINSTANCE hInstance)
{
hUxTheme = LoadLibrary(_T("UXTHEME"));
if (hUxTheme == NULL)
return;
GET_CB(OpenThemeData)
GET_CB(CloseThemeData)
GET_CB(DrawThemeBackground)
GET_CB(IsAppThemed)
GET_CB(IsThemeActive)
GET_CB(IsThemeBackgroundPartiallyTransparent)
GET_CB(DrawThemeParentBackground)
}
void Theme_Stop(void)
{
if(hUxTheme == NULL)
return;
FreeLibrary(hUxTheme);
hUxTheme = NULL;
}