Sander Schobers
3c89748eac
- Drop addon is based on WM_DROPFILES, dragdrop addon is based on the OLE IDragDrop interface and thus can registerer more interactions. - The allg5ui implementation will try to fall back on the drop addon (because the dragdrop addon wouldn't work properly). - Drop addon is refactored to use the same interface as the dragdrop addon.
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
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#include <Windows.h>
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#include <shellapi.h>
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#include <stdint.h>
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#include "_cgo_export.h"
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#define droppedFilePathSize 32767
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BOOL dropHookInitialized = FALSE;
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HHOOK nextHook;
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LRESULT CALLBACK DragAndDropHook(
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_In_ int nCode,
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_In_ WPARAM wParam,
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_In_ LPARAM lParam)
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{
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if (nCode < 0 || wParam == 0)
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return CallNextHookEx(nextHook, nCode, wParam, lParam);
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LPMSG message = (LPMSG)lParam;
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switch (message->message)
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{
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case WM_DROPFILES:
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{
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wchar_t droppedFilePath[droppedFilePathSize];
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clearDrop();
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HDROP drop = (HDROP)message->wParam;
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UINT numberOfFiles = DragQueryFile(drop, 0xFFFFFFFF, NULL, 0);
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for (UINT fileIndex = 0; fileIndex < numberOfFiles; fileIndex++)
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{
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UINT length = DragQueryFileW(drop, fileIndex, droppedFilePath, droppedFilePathSize);
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addDroppedFile(&droppedFilePath[0], length);
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}
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POINT position;
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DragQueryPoint(drop, &position);
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dropFinished(position.x, position.y);
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}
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break;
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}
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return CallNextHookEx(nextHook, nCode, wParam, lParam);
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}
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void initDropHook(HWND windowHandle)
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{
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if (dropHookInitialized == TRUE)
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return;
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DWORD threadId = GetWindowThreadProcessId(windowHandle, NULL);
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nextHook = SetWindowsHookEx(WH_GETMESSAGE, DragAndDropHook, NULL, threadId);
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dropHookInitialized = TRUE;
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}
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void SetDragAndDropHook(void *window)
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{
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HWND windowHandle = (HWND)window;
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initDropHook(windowHandle);
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DragAcceptFiles(windowHandle, TRUE);
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}
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