53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
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// 25 june 2014
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package ui
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type allocation struct {
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x int
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y int
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width int
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height int
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this Control
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neighbor Control
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}
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type sizingbase struct {
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xmargin int
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ymargintop int
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ymarginbottom int
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xpadding int
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ypadding int
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}
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type controlSizing interface {
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allocate(x int, y int, width int, height int, d *sizing) []*allocation
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preferredSize(*sizing) (int, int)
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commitResize(*allocation, *sizing)
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getAuxResizeInfo(*sizing)
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}
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// A container hosts a Control and resizes that Control based on changes in size to the parent Window.
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// container is used by Window, Tab, and Group to contain and control their respective Controls.
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// Tab and Group use containers for their content; as such, their commitResize() functions should only change the size of the Tab and Group themselves, and have their containers do the real work.
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// All containers must embed containerbase.
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type containerbase struct {
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child Control
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}
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// set to true to apply spacing to all windows
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var spaced bool = false
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func (c *container) resize(x, y, width, height int) {
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if c.child == nil { // no children; nothing to do
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return
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}
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d := c.beginResize()
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allocations := c.child.allocate(x + d.xmargin, y + d.ymargintop,
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width - (2 * d.xmargin), height - d.ymargintop - d.ymarginbottom, d)
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c.translateAllocationCoords(allocations, width, height)
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// move in reverse so as to approximate right->left order so neighbors make sense
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for i := len(allocations) - 1; i >= 0; i-- {
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allocations[i].this.commitResize(allocations[i], d)
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}
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}
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