Removed merged back file.
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Pietro Gagliardi
parent
51cef8e304
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a282dc6fff
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/* 17 july 2014 */
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#include "winapi_windows.h"
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#include "_cgo_export.h"
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/*
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This could all just be part of Window, but doing so just makes things complex.
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In this case, I chose to waste a window handle rather than keep things super complex.
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If this is seriously an issue in the future, I can roll it back.
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*/
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#define containerclass L"gouicontainer"
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static LRESULT CALLBACK containerWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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void *data;
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RECT r;
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HDC dc;
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PAINTSTRUCT ps;
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HWND parent;
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POINT client;
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data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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if (data == NULL) {
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/* the lpParam is available during WM_NCCREATE and WM_CREATE */
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if (uMsg == WM_NCCREATE) {
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storelpParam(hwnd, lParam);
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data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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storeContainerHWND(data, hwnd);
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}
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/* act as if we're not ready yet, even during WM_NCCREATE (nothing important to the switch statement below happens here anyway) */
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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switch (uMsg) {
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case WM_COMMAND:
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return forwardCommand(hwnd, uMsg, wParam, lParam);
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case WM_NOTIFY:
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return forwardNotify(hwnd, uMsg, wParam, lParam);
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case WM_PAINT:
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#ifndef BROKEN
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/* paint the parent's background in a flicker-free way */
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dc = BeginPaint(hwnd, &ps);
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if (dc == NULL)
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abort();//TODO
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parent = GetParent(hwnd);
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if (parent == NULL)
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abort();//TODO
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if (GetWindowRect(hwnd, &r) == 0)
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abort();//TODO
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/* GetWindowRect() returns in screen coordinates; we want parent client */
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client.x = r.left;
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client.y = r.top;
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if (ScreenToClient(parent, &client) == 0)
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abort();//TODO
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if (SetWindowOrgEx(dc, client.x, client.y, NULL) == 0)
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abort();//TODO
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SendMessageW(parent, WM_PRINTCLIENT, (WPARAM) dc, PRF_CLIENT);
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EndPaint(hwnd, &ps);
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return 0;
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#else
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/* paint the parent's background in a flicker-free way */
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dc = BeginPaint(hwnd, &ps);
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if (dc == NULL)
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abort();//TODO
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parent = GetParent(hwnd);
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if (parent == NULL)
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abort();//TODO
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if (GetWindowRect(hwnd, &r) == 0)
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abort();//TODO
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/* GetWindowRect() returns in screen coordinates; we want parent client */
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client.x = r.left;
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client.y = r.top;
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if (ScreenToClient(parent, &client) == 0)
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abort();//TODO
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rdc = CreateCompatibleDC(dc);
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if (rdc == NULL)
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abort();//TODO
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rbitmap = CreateCompatibleBitmap(dc, r.right - r.left, r.bottom - r.top);
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if (rbitmap == NULL)
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abort();//TODO
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prevrbitmap = SelectObject(rdc, rbitmap);
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if (prevrbitmap == NULL)
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abort();//TODO
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if (SetWindowOrgEx(rdc, client.x, client.y, NULL) == 0)
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abort();//TODO
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SendMessageW(parent, WM_PRINTCLIENT, (WPARAM) rdc, PRF_CLIENT);
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if (BitBlt(dc, 0, 0, (int) (r.right - r.left), (int) (r.bottom - r.top),
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rdc, 0, 0, SRCCOPY) == 0)
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abort();//TODO
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if (SelectObject(rdc, prevrbitmap) != rbitmap)
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abort();//TODO
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if (DeleteObject(rbitmap) == 0)
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abort();//TODO
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if (DeleteDC(rdc) == 0)
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abort();//TODO
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EndPaint(hwnd, &ps);
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return 0;
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#endif
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case WM_ERASEBKGND:
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/* we paint our own background above */
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return 1;
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case WM_SIZE:
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if (GetClientRect(hwnd, &r) == 0)
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xpanic("error getting client rect for Window in WM_SIZE", GetLastError());
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containerResize(data, &r);
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return 0;
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default:
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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xmissedmsg("container", "containerWndProc()", uMsg);
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return 0; /* unreached */
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}
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DWORD makeContainerWindowClass(char **errmsg)
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{
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WNDCLASSW wc;
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ZeroMemory(&wc, sizeof (WNDCLASSW));
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wc.lpfnWndProc = containerWndProc;
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wc.hInstance = hInstance;
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wc.hIcon = hDefaultIcon;
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wc.hCursor = hArrowCursor;
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wc.hbrBackground = NULL; /* we paint our own background */
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wc.lpszClassName = containerclass;
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if (RegisterClassW(&wc) == 0) {
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*errmsg = "error registering container window class";
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return GetLastError();
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}
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return 0;
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}
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HWND newContainer(void *data)
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{
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HWND hwnd;
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hwnd = CreateWindowExW(
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WS_EX_TRANSPARENT,
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containerclass, L"",
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WS_CHILD | WS_VISIBLE,
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CW_USEDEFAULT, CW_USEDEFAULT,
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100, 100,
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msgwin, NULL, hInstance, data);
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if (hwnd == NULL)
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xpanic("container creation failed", GetLastError());
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return hwnd;
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}
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