Noah Petherbridge
4ba563d48d
* Button: do not call MoveTo inside of Compute(). * Label: do not call MoveTo inside of Compute(). * MainWindow: add OnLoop callback function support so you can run custom code each loop and react to the event.State before the UI updates. * Supervisor: locate widgets using AbsolutePosition() instead of w.Point() to play nice with Frame and Window packed widgets. * Widget interface: rename Adopt() to SetParent() which makes more sense for what the function actually does. * Window: set itself as the parent of the body Frame so that the Supervisor can locate widgets anywhere inside a window's frames. Frame packing fixes: * Widgets with Expand:true grow their space with ResizeAuto to preserve the FixedSize() boolean, instead of being hard-resized to fill the Frame. * Widgets that Fill their space are resized with ResizeAuto too. Outstanding bugs: * Labels don't expand (window title bars, etc.)
41 lines
737 B
Go
41 lines
737 B
Go
package ui
|
|
|
|
import (
|
|
"git.kirsle.net/go/render"
|
|
)
|
|
|
|
// AbsolutePosition computes a widget's absolute X,Y position on the
|
|
// window on screen by crawling its parent widget tree.
|
|
func AbsolutePosition(w Widget) render.Point {
|
|
abs := w.Point()
|
|
|
|
var (
|
|
node = w
|
|
ok bool
|
|
)
|
|
|
|
for {
|
|
node, ok = node.Parent()
|
|
if !ok { // reached the top of the tree
|
|
return abs
|
|
}
|
|
|
|
abs.Add(node.Point())
|
|
}
|
|
}
|
|
|
|
// AbsoluteRect returns a Rect() offset with the absolute position.
|
|
func AbsoluteRect(w Widget) render.Rect {
|
|
var (
|
|
P = AbsolutePosition(w)
|
|
R = w.Rect()
|
|
)
|
|
return render.Rect{
|
|
X: P.X,
|
|
Y: P.Y,
|
|
W: R.W + P.X,
|
|
H: R.H, // TODO: the Canvas in EditMode lets you draw pixels
|
|
// below the status bar if we do `+ R.Y` here.
|
|
}
|
|
}
|