123 lines
3.2 KiB
Plaintext
123 lines
3.2 KiB
Plaintext
type sysSizeData struct {
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// for size calculations
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// all platforms
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margin int // windows: calculated
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spacing int // gtk+, cocoa: constants
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// windows
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baseX int
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baseY int
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// gtk, mac os x: nothing
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// for the actual resizing
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// windows
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// possibly also the HDWP
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// gtk
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shouldVAlignTop bool
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// mac os x
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// neighbor control alignment rect/baseline info
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}
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func (s *sysData) beginResize() *sysSizeData {
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// windows: get baseX/baseY for window and compute margin and spacing
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// gtk, mac: return zero
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}
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func (s *sysData) endResize(d *sysSizeData) {
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// redraw
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}
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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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func (s *sysData) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
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// windows, gtk: nothing
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// mac
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for _, a := range allocations {
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// winheight - y because (0,0) is the bottom-left corner of the window and not the top-left corner
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// (winheight - y) - height because (x, y) is the bottom-left corner of the control and not the top-left
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a.y = (winheight - a.y) - a.height
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}
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}
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func (s *sysData) resizeWindow(width, height int) {
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d := s.beginResize()
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allocations := s.allocate(0, 0, width, height, d)
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s.translateAllocationCoords(allocations, width, height)
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for _, c := range s.allocations {
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c.this.doResize(c, d)
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}
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s.endResize(d)
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}
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// setSize() becomes allocate()
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// each allocate on a non-layout control should just return a one-element slice
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// each doResize and getAuxResizeInfo on a control should just defer to sysData
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type Control interface {
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// ...
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allocate(x int, y int, width int, height int, d *sysSizeData) []*allocation
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preferredSize(d *sysSizeData) (width, height int)
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doResize(c *allocation, d *sysSizeData)
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getAuxResizeInfo(d *sysSizeData)
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}
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// vertical stack: no concept of neighbor, but not too hard to add a vertical neighbor
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// horizontal stack:
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var current *allocation
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// ...
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as := s.controls[i].allocate(...)
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if current != nil {
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current.neighbor = as[0].self
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}
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current = as[0]
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// append all of as
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// grid:
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// same as above, except current is set to nil on each new row
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// adding a vertical neighbor would require storing an extra list
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// windows
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func (s *sysData) doResize(c *allocation, d *sysSizeData) {
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if s.ctype == c_label {
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// add additional offset of 4 dialog units
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}
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// resize
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}
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func (s *sysData) getAuxResizeInfo(d *sysSizeData) {
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// do nothing
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}
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// gtk+
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func (s *sysData) doResize(c *allocation, d *sysSizeData) {
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if s.ctype == c_label && !s.alternate && c.neighbor != nil {
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c.neighbor.getAuxResizeInfo(d)
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if d.shouldVAlignTop {
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// TODO should it be center-aligned to the first line or not
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gtk_misc_set_align(s.widget, 0, 0)
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} else {
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gtk_misc_set_align(s.widget, 0, 0.5)
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}
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}
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// resize
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}
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func (s *sysData) getAuxResizeInfo(d *sysSizeData) {
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d.shouldVAlignTop = (s.ctype == c_listbox) || (s.ctype == c_area)
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}
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// cocoa
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func (s *sysData) doResize(c *allocation, d *sysSizeData) {
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if s.ctype == c_label && !s.alternate && c.neighbor != nil {
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c.neighbor.getAuxResizeInfo(d)
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// get this control's alignment rect and baseline
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// align
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}
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// resize
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}
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func (s *sysData) getAuxResizeInfo(d *sysSizeData) {
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// get this control's alignment rect and baseline
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}
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