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app: [Windows] support TopMost option

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Use HWND_TOPMOST and HWND_NOTOPMOST when applying Config.TopMost on Windows.

Leave SWP_NOZORDER set when TopMost hasn't changed, so other Configure calls don't reorder the window.

Signed-off-by: qiannian <qianniancn@gmail.com>
This commit is contained in:
qiannian
2026-06-26 23:11:22 +08:00
committed by Elias Naur
parent 3eab806940
commit 5191409708
2 changed files with 14 additions and 4 deletions
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app/internal/windows/windows.go
+3 -2
View File
@@ -207,8 +207,9 @@ const (
CFS_POINT = 0x0002
CFS_CANDIDATEPOS = 0x0040
HWND_TOP = syscall.Handle(0)
HWND_TOPMOST = ^(syscall.Handle(1) - 1) // -1
HWND_TOP = syscall.Handle(0)
HWND_TOPMOST = ^(syscall.Handle(1) - 1) // -1
HWND_NOTOPMOST = ^(syscall.Handle(2) - 1) // -2
HTCAPTION = 2
HTCLIENT = 1
app/os_windows.go
+11 -2
View File
@@ -747,7 +747,16 @@ func (w *window) Configure(options []Option) {
style := windows.GetWindowLong(w.hwnd, windows.GWL_STYLE)
var showMode int32
var x, y, width, height int32
swpStyle := uintptr(windows.SWP_NOZORDER | windows.SWP_FRAMECHANGED)
swpStyle := uintptr(windows.SWP_FRAMECHANGED)
if cnf.TopMost == w.config.TopMost {
// Don't change the z-order if TopMost didn't change.
swpStyle |= windows.SWP_NOZORDER
}
hwndAfter := windows.HWND_NOTOPMOST
if cnf.TopMost {
hwndAfter = windows.HWND_TOPMOST
}
w.config.TopMost = cnf.TopMost
winStyle := uintptr(windows.WS_OVERLAPPEDWINDOW)
style &^= winStyle
switch cnf.Mode {
@@ -799,7 +808,7 @@ func (w *window) Configure(options []Option) {
// Note: these invocation all trigger the windows callback method which may process a pending system.ActionCenter
// action, so SetWindowPos should come first so as to not "overwrite" system.ActionCenter.
windows.SetWindowPos(w.hwnd, 0, x, y, width, height, swpStyle)
windows.SetWindowPos(w.hwnd, hwndAfter, x, y, width, height, swpStyle)
windows.SetWindowLong(w.hwnd, windows.GWL_STYLE, style)
windows.ShowWindow(w.hwnd, showMode)
}