Method ConstrainWinGeom

system/screen.go:174–217

ConstrainWinGeom constrains window geometry to fit in the screen. Size is in pixel units.

(sz, pos image.Point)

// ConstrainWinGeom constrains window geometry to fit in the screen.
// Size is in pixel units.
func (sc *Screen) ConstrainWinGeom(sz, pos image.Point) (csz, cpos image.Point) {
	scsz := sc.Geometry.Size() // in window coords size

	// options size are in pixel sizes, logic below works in window sizes
	csz = sc.WinSizeFromPix(sz)
	cpos = pos

	// fmt.Printf("sz: %v  csz: %v  scsz: %v\n", sz, csz, scsz)
	// fmt.Println(string(debug.Stack()))
	if csz.X > scsz.X {
		csz.X = scsz.X - 10
		// fmt.Println("constrain x:", csz.X)
	}
	if csz.Y > scsz.Y {
		csz.Y = scsz.Y - 10
		// fmt.Println("constrain y:", csz.Y)
	}

	// these are windows-specific special numbers for minimized windows
	// can be sent here for WinGeom saved geom.
	if cpos.X == -32000 {
		cpos.X = 0
	}
	if cpos.Y == -32000 {
		cpos.Y = 50
	}

	// don't go off the edge
	if cpos.X+csz.X > scsz.X {
		cpos.X = scsz.X - csz.X
	}
	if cpos.Y+csz.Y > scsz.Y {
		cpos.Y = scsz.Y - csz.Y
	}
	if cpos.X < 0 {
		cpos.X = 0
	}
	if cpos.Y < 0 {
		cpos.Y = 0
	}

	csz = sc.WinSizeToPix(csz)
	return
}

// InitScreenLogicalDPIFunc is a function that can be set to initialize the
// screen LogicalDPI values based on user preferences etc.  Called just before