51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
|
// 25 june 2014
|
||
|
|
|
||
|
|
package ui
|
||
|
|
|
||
|
|
type allocation struct {
|
||
|
|
x int
|
||
|
|
y int
|
||
|
|
width int
|
||
|
|
height int
|
||
|
|
this Control
|
||
|
|
neighbor Control
|
||
|
|
}
|
||
|
|
|
||
|
|
type sizingbase struct {
|
||
|
|
xmargin int
|
||
|
|
ymargin int
|
||
|
|
xpadding int
|
||
|
|
ypadding int
|
||
|
|
}
|
||
|
|
|
||
|
|
type controlSizing interface {
|
||
|
|
allocate(x int, y int, width int, height int, d *sizing) []*allocation
|
||
|
|
preferredSize(*sizing) (int, int)
|
||
|
|
commitResize(*allocation, *sizing)
|
||
|
|
getAuxResizeInfo(*sizing)
|
||
|
|
}
|
||
|
|
|
||
|
|
// A sizer hosts a Control and resizes that Control based on changes in size to the parent Window.
|
||
|
|
// sizer is used by Window, Tab, and [TODO implement] Group to contain and control their respective controls.
|
||
|
|
// Window is the beginning of the resize chain; resizes happen on the system side.
|
||
|
|
// Tab and Group are Controls and thus implement controlSizing; they should call their internal sizers's resize() method in their own commitResize().
|
||
|
|
type sizer struct {
|
||
|
|
child Control
|
||
|
|
}
|
||
|
|
|
||
|
|
// set to true to apply spacing to all windows
|
||
|
|
var spaced bool = false
|
||
|
|
|
||
|
|
func (c *sizer) resize(x, y, width, height int) {
|
||
|
|
if c.child == nil { // no children; nothing to do
|
||
|
|
return
|
||
|
|
}
|
||
|
|
d := c.beginResize()
|
||
|
|
allocations := c.child.allocate(x + d.xmargin, y + d.ymargin, width - (2 * d.xmargin), height - (2 * d.ymargin), d)
|
||
|
|
c.translateAllocationCoords(allocations, width, height)
|
||
|
|
// move in reverse so as to approximate right->left order so neighbors make sense
|
||
|
|
for i := len(allocations) - 1; i >= 0; i-- {
|
||
|
|
allocations[i].this.commitResize(allocations[i], d)
|
||
|
|
}
|
||
|
|
}
|