问题描述
我正在尝试根据用户设置制作一个在具有 Aero/Glass 和自定义渲染框架(通过处理 WM_NCPAINT
)之间交替的窗口.(Windows Vista).
I am trying to make a window that alternates between having an Aero/Glass and a custom rendered frame (by handling WM_NCPAINT
) based on a user setting. (Windows Vista).
DwmComposition
已启用.我的应用程序带有玻璃框架,但是一旦我切换设置以触发自定义 WM_NCPAINT
代码路径,然后切换回使用 DefWindowProc
的 WM_NCPAINT
处理,本机框架现在永久停留在Vista Basic"样式 - 它不再是半透明的,并且标题按钮看起来与普通的 Aero/Glass 按钮不同.
DwmComposition
is enabled. My app comes up with the glass frame, but as soon as I toggle the setting to trigger the custom WM_NCPAINT
codepath then toggle back to use DefWindowProc
's WM_NCPAINT
handling, the native frame is now perpetually stuck in the "Vista Basic" style - it's no longer translucent and the caption buttons look different to the normal Aero/Glass ones.
我尝试了从发送 SWP_FRAMECHANGED
到更改窗口样式然后将其改回、隐藏等几乎所有戳窗口的方法,但都无济于事.似乎只要我为玻璃窗口处理 WM_NCPAINT
而不是推迟到 DefWindowProc
我的窗口就永远坏了".
I've tried just about every way of poking the window from sending SWP_FRAMECHANGED
to changing the window style then changing it back, hiding it, etc, but all to no avail. It seems like as soon as I handle WM_NCPAINT
for a glass window rather than deferring to DefWindowProc
my window is forever "broken".
我在 MSDN 上发现了一个 C#/WPF 示例(代码 dot msdn dot microsoft dot com slash chrome ),它似乎表明一个人只需要停止处理 WM_NCPAINT 并且玻璃会返回,但这似乎在我的自己的应用.
I found a C#/WPF example on MSDN (code dot msdn dot microsoft dot com slash chrome ) that seemed to indicate that one simply needed to stop handling WM_NCPAINT and the glass would return, but that does not seem to work in my own app.
有没有办法干净地重置这个状态?我的代码是用 C++ 编写的,在这里:
Is there a way to reset this state cleanly? My code is in C++ and lives here:
http://bengoodger.dreamhosters.com/software/chrome/dwm/
#include <windows.h>
#include <dwmapi.h>
static const wchar_t* kWindowClass = L"BrokenGlassWindow";
static const wchar_t* kWindowTitle =
L"BrokenGlass - Right click client area to toggle frame type.";
static const int kGlassBorderSize = 50;
static const int kNonGlassBorderSize = 40;
static bool g_glass = true;
bool IsGlass() {
BOOL composition_enabled = FALSE;
return DwmIsCompositionEnabled(&composition_enabled) == S_OK &&
composition_enabled && g_glass;
}
void SetIsGlass(bool is_glass) {
g_glass = is_glass;
}
void ToggleGlass(HWND hwnd) {
SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_FRAMECHANGED);
RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_UPDATENOW);
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM w_param,
LPARAM l_param) {
PAINTSTRUCT ps;
HDC hdc;
RECT wr;
HBRUSH br;
RECT* nccr = NULL;
RECT dirty;
RECT dirty_box;
MARGINS dwmm = {0};
WINDOWPOS* wp = NULL;
switch (message) {
case WM_CREATE:
SetCursor(LoadCursor(NULL, IDC_ARROW));
break;
case WM_ERASEBKGND:
return 1;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &wr);
br = GetSysColorBrush(IsGlass() ? COLOR_APPWORKSPACE : COLOR_WINDOW);
FillRect(hdc, &wr, br);
EndPaint(hwnd, &ps);
break;
case WM_NCPAINT:
if (IsGlass())
return DefWindowProc(hwnd, message, w_param, l_param);
GetWindowRect(hwnd, &wr);
if (!w_param|| w_param == 1) {
dirty = wr;
dirty.left = dirty.top = 0;
} else {
GetRgnBox(reinterpret_cast<HRGN>(w_param), &dirty_box);
if (!IntersectRect(&dirty, &dirty_box, &wr))
return 0;
OffsetRect(&dirty, -wr.left, -wr.top);
}
hdc = GetWindowDC(hwnd);
br = CreateSolidBrush(RGB(255,0,0));
FillRect(hdc, &dirty, br);
DeleteObject(br);
ReleaseDC(hwnd, hdc);
break;
case WM_NCACTIVATE:
// Force paint our non-client area otherwise Windows will paint its own.
RedrawWindow(hwnd, NULL, NULL, RDW_UPDATENOW);
break;
case WM_NCCALCSIZE:
nccr = w_param ? &reinterpret_cast<NCCALCSIZE_PARAMS*>(l_param)->rgrc[0]
: reinterpret_cast<RECT*>(l_param);
nccr->bottom -= IsGlass() ? kGlassBorderSize : kNonGlassBorderSize;
nccr->right -= IsGlass() ? kGlassBorderSize : kNonGlassBorderSize;
nccr->left += IsGlass() ? kGlassBorderSize : kNonGlassBorderSize;
nccr->top += IsGlass() ? kGlassBorderSize : kNonGlassBorderSize;
return WVR_REDRAW;
case WM_RBUTTONDOWN:
SetIsGlass(!g_glass);
ToggleGlass(hwnd);
break;
case 0x31E: // WM_DWMCOMPOSITIONCHANGED:
ToggleGlass(hwnd);
break;
case 0xAE: // WM_NCUAHDRAWCAPTION:
case 0xAF: // WM_NCUAHDRAWFRAME:
return IsGlass() ? DefWindowProc(hwnd, message, w_param, l_param) : 0;
case WM_WINDOWPOSCHANGED:
dwmm.cxLeftWidth = kGlassBorderSize;
dwmm.cxRightWidth = kGlassBorderSize;
dwmm.cyTopHeight = kGlassBorderSize;
dwmm.cyBottomHeight = kGlassBorderSize;
DwmExtendFrameIntoClientArea(hwnd, &dwmm);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, message, w_param, l_param);
}
return 0;
}
ATOM RegisterClazz(HINSTANCE instance) {
WNDCLASSEX wcex = {0};
wcex.cbSize = sizeof(wcex);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.hInstance = instance;
wcex.lpszClassName = kWindowClass;
return RegisterClassEx(&wcex);
}
int WINAPI WinMain(HINSTANCE instance, HINSTANCE, LPSTR, int show_command) {
RegisterClazz(instance);
HWND hwnd = CreateWindow(kWindowClass, kWindowTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL,
instance, NULL);
ShowWindow(hwnd, show_command);
MSG msg;
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return static_cast<int>(msg.wParam);
}
推荐答案
当在 Aero/Glass 和自定义渲染框架之间切换时,您可以使用以下内容显式控制非客户区渲染策略:
When toggling between Aero/Glass and your custom rendered frame it you can use the following to explicitly control the non-client area rendering policy:
DWMNCRENDERINGPOLICY policy = DWMNCRP_ENABLED; // DWMNCRP_DISABLED to toggle back
DwmSetWindowAttribute(hwnd,
DWMWA_NCRENDERING_POLICY,
(void*)&policy,
sizeof(DWMNCRENDERINGPOLICY));
这篇关于处理 WM_NCPAINT “中断"Vista/Aero 上的 DWM 玻璃渲染的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!