79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
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// +build !windows,!darwin,!plan9
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// 23 february 2014
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package ui
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type sysSizeData struct {
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cSysSizeData
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// for size calculations
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// gtk+ needs nothing
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// for the actual resizing
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shouldVAlignTop bool
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}
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const (
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gtkXMargin = 12
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gtkYMargin = 12
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gtkXPadding = 12
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gtkYPadding = 6
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)
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func (s *sysData) beginResize() (d *sysSizeData) {
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d = new(sysSizeData)
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if s.spaced {
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d.xmargin = gtkXMargin
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d.ymargin = gtkYMargin
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d.xpadding = gtkXPadding
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d.ypadding = gtkYPadding
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}
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return d
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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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func (s *sysData) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
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// no need for coordinate conversion with gtk+
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}
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func (s *sysData) commitResize(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_alignment(s.widget, 0, 0)
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} else {
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gtk_misc_set_alignment(s.widget, 0, 0.5)
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}
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}
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// TODO merge this here
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s.setRect(c.x, c.y, c.width, c.height, 0)
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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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// GTK+ 3 makes this easy: controls can tell us what their preferred size is!
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// ...actually, it tells us two things: the "minimum size" and the "natural size".
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// The "minimum size" is the smallest size we /can/ display /anything/. The "natural size" is the smallest size we would /prefer/ to display.
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// The difference? Minimum size takes into account things like truncation with ellipses: the minimum size of a label can allot just the ellipses!
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// So we use the natural size instead.
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// There is a warning about height-for-width controls, but in my tests this isn't an issue.
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// For Areas, we manually save the Area size and use that, just to be safe.
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// We don't need to worry about y-offset because label alignment is "vertically center", which GtkLabel does for us.
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func (s *sysData) preferredSize(d *sysSizeData) (width int, height int) {
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if s.ctype == c_area {
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return s.areawidth, s.areaheight
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}
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_, _, width, height = gtk_widget_get_preferred_size(s.widget)
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return width, height
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}
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