4asiki-WinAPI/multipleDisplay.cpp at master · Bocha91/4asiki-WinAPI · GitHub

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#include <windows.h>
#include "multimon.h"

#define MONITOR_CENTER   0x0001        // center rect to monitor
#define MONITOR_CLIP     0x0000        // clip rect to monitor
#define MONITOR_WORKAREA 0x0002        // use monitor work area
#define MONITOR_AREA     0x0000        // use monitor entire area

//
//  ClipOrCenterRectToMonitor
//
//  The most common problem apps have when running on a
//  multimonitor system is that they "clip" or "pin" windows
//  based on the SM_CXSCREEN and SM_CYSCREEN system metrics.
//  Because of app compatibility reasons these system metrics
//  return the size of the primary monitor.
//
//  This shows how you use the multi-monitor functions
//  to do the same thing.
//
// Íàèáîëåå ðàñïðîñòðàíåííûå ïðîáëåìíûå ïðèëîæåíèÿ ïðè ðàáîòå íà
// ìóëüòèìîíèòîðíàÿ ñèñòåìà ñîñòîèò â òîì, ÷òî îíè «çàæèìàþò» èëè «çàêðåïëÿþò» îêíà
// íà îñíîâå ñèñòåìíûõ ïîêàçàòåëåé SM_CXSCREEN è SM_CYSCREEN.
// Èç-çà ñîâìåñòèìîñòè ïðèëîæåíèé ýòè ïîêàçàòåëè ñèñòåìû
// âåðíóòü ðàçìåð îñíîâíîãî ìîíèòîðà.
//
// Ýòî ïîêàçûâàåò, êàê âû èñïîëüçóåòå ôóíêöèè íåñêîëüêèõ ìîíèòîðîâ
// ñäåëàòü òî æå ñàìîå.

void ClipOrCenterRectToMonitor(LPRECT prc, UINT flags)
{
    HMONITOR hMonitor;
    MONITORINFO mi;
    RECT        rc;
    int         w = prc->right - prc->left;
    int         h = prc->bottom - prc->top;

    //
    // get the nearest monitor to the passed rect.
    // ïîëó÷àåì áëèæàéøèé ìîíèòîð ê ïåðåäàííîìó ïðÿìîóãîëüíèêó.
    //
    hMonitor = MonitorFromRect(prc, MONITOR_DEFAULTTONEAREST);

    POINT      pt;
    pt.x = prc->right;
    pt.y = prc->bottom;

    //
    // ïîëó÷àåì áëèæàéøèé ìîíèòîð ê ïåðåäàííîé òî÷êå.
    //
    hMonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);

    //
    // get the work area or entire monitor rect.
    // ïîëó÷èòü ðàáî÷óþ îáëàñòü èëè âåñü ïðÿìîóãîëüíèê ìîíèòîðà.
    //
    mi.cbSize = sizeof(mi);
    GetMonitorInfo(hMonitor, &mi);

    if (flags & MONITOR_WORKAREA)
        rc = mi.rcWork;
    else
        rc = mi.rcMonitor;

    //
    // center or clip the passed rect to the monitor rect
    // öåíòðèðóåì èëè îáðåçàåì ïåðåäàííûé ïðÿìîóãîëüíèê íà ïðÿìîóãîëüíèê ìîíèòîðà
    //
    if (flags & MONITOR_CENTER)
    {
        prc->left = rc.left + (rc.right - rc.left - w) / 2;
        prc->top = rc.top + (rc.bottom - rc.top - h) / 2;
        prc->right = prc->left + w;
        prc->bottom = prc->top + h;
    }
    else
    {
        prc->left = max(rc.left, min(rc.right - w, prc->left));
        prc->top = max(rc.top, min(rc.bottom - h, prc->top));
        prc->right = prc->left + w;
        prc->bottom = prc->top + h;
    }
}

void ClipOrCenterWindowToMonitor(HWND hwnd, UINT flags)
{
    RECT rc;
    rc.left   = GetSystemMetrics(SM_XVIRTUALSCREEN);
    rc.right  = GetSystemMetrics(SM_CXVIRTUALSCREEN);
    rc.top    = GetSystemMetrics(SM_YVIRTUALSCREEN);
    rc.bottom = GetSystemMetrics(SM_CYVIRTUALSCREEN);

    // ìû õîòèì ïîçèöèþ â ïðàâîì âåðõíåì óãëó âèðòóàëüíîãî ýêðàíà

    //GetWindowRect(hwnd, &rc);
    ClipOrCenterRectToMonitor(&rc, flags);
    SetWindowPos(hwnd, NULL, rc.left, rc.top, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
}