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Windows: allow windows to span multiple monitors #104438

Merged
Harley Acheson merged 1 commits from Harley/blender:SpanMonitorsWin32 into main 2023-02-16 00:41:36 +01:00
Conversation 2 Commits 1 Files Changed 2 +44 -19
2 changed files with 44 additions and 19 deletions
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59
intern/ghost/intern/GHOST_WindowWin32.cpp
View File

@ -93,7 +93,7 @@ GHOST_WindowWin32::GHOST_WindowWin32(GHOST_SystemWin32 *system,
}
RECT win_rect = {left, top, long(left + width), long(top + height)};
adjustWindowRectForClosestMonitor(&win_rect, style, extended_style);
adjustWindowRectForDesktop(&win_rect, style, extended_style);
wchar_t *title_16 = alloc_utf16_from_8((char *)title, 0);
m_hWnd = ::CreateWindowExW(extended_style, /* window extended style */
@ -298,24 +298,52 @@ GHOST_WindowWin32::~GHOST_WindowWin32()
m_directManipulationHelper = NULL;
}
void GHOST_WindowWin32::adjustWindowRectForClosestMonitor(LPRECT win_rect,
DWORD dwStyle,
DWORD dwExStyle)
void GHOST_WindowWin32::adjustWindowRectForDesktop(LPRECT win_rect, DWORD dwStyle, DWORD dwExStyle)
{
/* Get Details of the closest monitor. */
HMONITOR hmonitor = MonitorFromRect(win_rect, MONITOR_DEFAULTTONEAREST);
/* Windows can span multiple monitors, but must be usable. The desktop can have a larger
* surface than all monitors combined, for example when two monitors are aligned diagonally.
* Therefore we ensure that all the window's corners are within some monitor's Work area. */
POINT pt;
HMONITOR hmonitor;
MONITORINFOEX monitor;
monitor.cbSize = sizeof(MONITORINFOEX);
monitor.dwFlags = 0;
GetMonitorInfo(hmonitor, &monitor);
/* Constrain requested size and position to fit within this monitor. */
LONG width = min(monitor.rcWork.right - monitor.rcWork.left, win_rect->right - win_rect->left);
LONG height = min(monitor.rcWork.bottom - monitor.rcWork.top, win_rect->bottom - win_rect->top);
win_rect->left = min(max(monitor.rcWork.left, win_rect->left), monitor.rcWork.right - width);
win_rect->right = win_rect->left + width;
win_rect->top = min(max(monitor.rcWork.top, win_rect->top), monitor.rcWork.bottom - height);
win_rect->bottom = win_rect->top + height;
/* Note that with MonitorFromPoint using MONITOR_DEFAULTTONEAREST, it will return
* the exact monitor if there is one at the location or the nearest monitor if not. */
/* Top-left. */
pt.x = win_rect->left;
pt.y = win_rect->top;
hmonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);
GetMonitorInfo(hmonitor, &monitor);
win_rect->top = max(win_rect->top, monitor.rcWork.top);
win_rect->left = max(win_rect->left, monitor.rcWork.left);
/* Top-right. */
pt.x = win_rect->right;
pt.y = win_rect->top;
hmonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);
GetMonitorInfo(hmonitor, &monitor);
win_rect->top = max(win_rect->top, monitor.rcWork.top);
win_rect->right = min(win_rect->right, monitor.rcWork.right);
/* Bottom-left. */
pt.x = win_rect->left;
pt.y = win_rect->bottom;
hmonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);
GetMonitorInfo(hmonitor, &monitor);
win_rect->bottom = min(win_rect->bottom, monitor.rcWork.bottom);
win_rect->left = max(win_rect->left, monitor.rcWork.left);
/* Bottom-right. */
pt.x = win_rect->right;
pt.y = win_rect->bottom;
hmonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);
GetMonitorInfo(hmonitor, &monitor);
win_rect->bottom = min(win_rect->bottom, monitor.rcWork.bottom);
win_rect->right = min(win_rect->right, monitor.rcWork.right);
/* With Windows 10 and newer we can adjust for chrome that differs with DPI and scale. */
GHOST_WIN32_AdjustWindowRectExForDpi fpAdjustWindowRectExForDpi = nullptr;
@ -334,9 +362,6 @@ void GHOST_WindowWin32::adjustWindowRectForClosestMonitor(LPRECT win_rect,
else {
AdjustWindowRectEx(win_rect, dwStyle & ~WS_OVERLAPPED, FALSE, dwExStyle);
}
/* But never allow a top position that can hide part of the title bar. */
win_rect->top = max(monitor.rcWork.top, win_rect->top);
}
bool GHOST_WindowWin32::getValid() const

4
intern/ghost/intern/GHOST_WindowWin32.h
View File

@ -87,12 +87,12 @@ class GHOST_WindowWin32 : public GHOST_Window {
~GHOST_WindowWin32();
/**
* Adjusts a requested window rect to fit and position correctly in monitor.
* Adjusts a requested window rect to fit and position within the desktop.
* \param win_rect: pointer to rectangle that will be modified.
* \param dwStyle: The Window Style of the window whose required size is to be calculated.
* \param dwExStyle: The Extended Window Style of the window.
*/
void adjustWindowRectForClosestMonitor(LPRECT win_rect, DWORD dwStyle, DWORD dwExStyle);
void adjustWindowRectForDesktop(LPRECT win_rect, DWORD dwStyle, DWORD dwExStyle);
/**
* Returns indication as to whether the window is valid.