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ui: Use more stable way to determine the current monitor

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This commit is contained in:
Hajime Hoshi 2018-10-06 19:53:01 +09:00
parent 55a397bd65
commit cc336a4c38
1 changed files with 4 additions and 13 deletions
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17
internal/ui/ui_glfw.go
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@ -767,7 +767,7 @@ func (u *userInterface) forceSetScreenSize(width, height int, scale float64, ful
u.toChangeSize = true
}
// currentMonitor returns the monitor nearest from the current window.
// currentMonitor returns the monitor most suitable from the current window.
//
// currentMonitor must be called on the main thread.
func (u *userInterface) currentMonitor() *glfw.Monitor {
@ -777,21 +777,12 @@ func (u *userInterface) currentMonitor() *glfw.Monitor {
}
wx, wy := w.GetPos()
ww, wh := w.GetSize()
wr := image.Rect(wx, wy, wx+ww, wy+wh)
best := -1
var current *glfw.Monitor
for _, m := range glfw.GetMonitors() {
mx, my := m.GetPos()
v := m.GetVideoMode()
mr := image.Rect(mx, my, mx+v.Width, my+v.Height)
overlap := wr.Intersect(mr)
area := overlap.Dx() * overlap.Dy()
if area > best {
current = m
best = area
if mx <= wx && wx < mx+v.Width && my <= wy && wy < my+v.Height {
return m
}
}
return current
return glfw.GetPrimaryMonitor()
}