Question

在Windows 10上，我一直在尝试替换“窗口捕捉”功能，以更好地与超宽显示器配合使用。尽管捕获Windows键+箭头光标来处理键盘快捷键没有问题，但我现在想检测何时将另一个应用程序窗口拖动到当前监视器的顶部/右侧/左侧/底部。

当前代码：

#include <iostream>
#include <Windows.h>

HHOOK _hook_keyboard;
KBDLLHOOKSTRUCT kbdStruct;

CONST int HORIZONTAL_SLOTS = 4;
CONST int VERTICAL_SLOTS = 1;

// horizontalPosition/verticalPosition specifies which "slot" starting at 0 to place Window in
// horizontalSlots/verticalSlots specifies how many slots to divide the screen into
void MoveAndResizeActiveWindow(int horizontalPosition, int verticalPosition, int horizontalSlots, int verticalSlots)
{
    // get work area on primary monitor
    HWND currentWindow = GetForegroundWindow();
    if (currentWindow != NULL)
    {
        HMONITOR currentMonitor = MonitorFromWindow(currentWindow, MONITOR_DEFAULTTONEAREST);
        MONITORINFO monitorInfo;
        monitorInfo.cbSize = sizeof(MONITORINFO);
        if (GetMonitorInfo(currentMonitor, &monitorInfo))
        {
            long width = monitorInfo.rcWork.right - monitorInfo.rcWork.left;
            long height = monitorInfo.rcWork.bottom - monitorInfo.rcWork.top;
            long snappedWidth = width / horizontalSlots;
            long snappedHeight = height / verticalSlots;
            long snappedLeft = (snappedWidth * horizontalPosition) + monitorInfo.rcWork.left;
            long snappedTop = (snappedHeight * verticalPosition) + monitorInfo.rcWork.top;
            MoveWindow(currentWindow, snappedLeft, snappedTop, snappedWidth, snappedHeight, true);
        }
    }
}
LRESULT __stdcall HookCallbackKeyboard(int nCode, WPARAM wParam, LPARAM lParam)
{
    BOOL bEatkeystroke = false;
    short keyState;

    if (nCode >= 0)
    {
        kbdStruct = *((KBDLLHOOKSTRUCT*)lParam);

        switch (wParam)
        {
        case WM_KEYDOWN:
            keyState = GetAsyncKeyState(VK_LWIN);
            if (keyState)
            {
                switch (kbdStruct.vkCode)
                {
                    case VK_LEFT:
                        bEatkeystroke = true;
                        break;
                    case VK_RIGHT:
                        bEatkeystroke = true;
                        break;
                    case VK_UP:
                        bEatkeystroke = true;
                        break;
                    case VK_DOWN:
                        bEatkeystroke = true;
                        break;
                };
            };
            break;
        case WM_KEYUP:
            keyState = GetAsyncKeyState(VK_LWIN);
            if (keyState)
            {
                switch (kbdStruct.vkCode)
                {
                case VK_LEFT:
                    MoveAndResizeActiveWindow(0, 0, 4, 1);
                    bEatkeystroke = true;
                    break;
                case VK_RIGHT:
                    MoveAndResizeActiveWindow(3, 0, 4, 1);
                    bEatkeystroke = true;
                    break;
                    break;
                case VK_UP:
                    MoveAndResizeActiveWindow(1, 0, 4, 1);
                    bEatkeystroke = true;
                    break;
                case VK_DOWN:
                    MoveAndResizeActiveWindow(2, 0, 4, 1);
                    bEatkeystroke = true;
                    break;
                };
            }
            break;
        };
    }
    if (bEatkeystroke)
    {
        return 1;
    }
    else
    {
        return CallNextHookEx(_hook_keyboard, nCode, wParam, lParam);
    }
}

void SetHook()
{
    if (!(_hook_keyboard = SetWindowsHookEx(WH_KEYBOARD_LL, HookCallbackKeyboard, NULL, 0)))
    {
        MessageBox(NULL, L"Failed to install hook on keyboard!", L"Error", MB_ICONERROR);
    }
}


int main(int argc, char** argv[])
{
    SetHook();
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}

有什么建议可以确定何时将Windows拖动到屏幕上的特定位置？

根据对原始问题的答复中的建议，我尝试将SetWinEventHook与以下代码配合使用，计划在纠正要观察的事件后限制EVENT_MIN和EVENT_MAX。

g_hook_winevent = SetWinEventHook(
        EVENT_MIN, EVENT_MAX, 
        NULL,                                          // Handle to DLL.
        HandleWinEvent,                                // The callback.
        0, 0,              // Process and thread IDs of interest (0 = all)
        WINEVENT_OUTOFCONTEXT | WINEVENT_SKIPOWNPROCESS); // Flags.
}

void CALLBACK HandleWinEvent(HWINEVENTHOOK hook, DWORD event, HWND hwnd,
    LONG idObject, LONG idChild,
    DWORD dwEventThread, DWORD dwmsEventTime)
{
    // process event here

}

尽管这可以通过EVENT_SYSTEM_MOVESIZESTART和EVENT_SYSTEM_MOVESIZEEND轻松跟踪Windows移动的开始或结束，但是我在这里看不到跟踪EVENT_SYSTEM_MOVESIZEEND之前Window移动的事件。

虽然这是一个很好的选择，但是理想情况下，我希望能够从EVENT_SYSTEM_MOVESIZESTART开始到EVENT_SYSTEM_MOVESIZEEND完成为止检测窗口位置。使用记事本进行测试，唯一在移动过程中引发的事件是EVENT_OBJECT_NAMECHANGE，该事件似乎在窗口移动期间不断触发，至少使用记事本会触发。但是，根据documentation中的描述，我不确定这是否适合我的用例：“对象的Name属性已更改。系统针对以下用户界面元素发送此事件：复选框，光标，列表-view控件，按钮，单选按钮，状态栏控件，树视图控件和窗口对象。服务器应用程序为其可访问对象发送此事件。“

检测何时将任何应用程序窗口拖动到屏幕顶部

0 个答案: