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// +build !windows,!darwin
// 30 july 2014
package ui
import (
"unsafe"
)
// #include "gtk_unix.h"
import "C"
// all Controls that call base methods must be this
type controlPrivate interface {
widget() *C.GtkWidget
Control
}
type controlParent struct {
c *C.GtkContainer
}
func basesetParent(c controlPrivate, p *controlParent) {
C.gtk_container_add(p.c, c.widget())
// make sure the new widget is shown if not explicitly hidden
c.containerShow()
}
func basecontainerShow(c controlPrivate) {
C.gtk_widget_show_all(c.widget())
}
func basecontainerHide(c controlPrivate) {
C.gtk_widget_hide(c.widget())
}
func basepreferredSize(c controlPrivate, d *sizing) (int, int) {
// GTK+ 3 makes this easy: controls can tell us what their preferred size is!
// ...actually, it tells us two things: the "minimum size" and the "natural size".
// The "minimum size" is the smallest size we /can/ display /anything/. The "natural size" is the smallest size we would /prefer/ to display.
// The difference? Minimum size takes into account things like truncation with ellipses: the minimum size of a label can allot just the ellipses!
// So we use the natural size instead.
// There is a warning about height-for-width controls, but in my tests this isn't an issue.
// For Areas, we manually save the Area size and use that, just to be safe.
//TODO
/*
if s.ctype == c_area {
return s.areawidth, s.areaheight
}
*/
var r C.GtkRequisition
C.gtk_widget_get_preferred_size(c.widget(), nil, &r)
return int(r.width), int(r.height)
}
func basecommitResize(c controlPrivate, a *allocation, d *sizing) {
dobasecommitResize(c.widget(), a, d)
}
func dobasecommitResize(w *C.GtkWidget, c *allocation, d *sizing) {
// as we resize on size-allocate, we have to also use size-allocate on our children
// this is fine anyway; in fact, this allows us to move without knowing what the container is!
// this is what GtkBox does anyway
// thanks to tristan in irc.gimp.net/#gtk+
var r C.GtkAllocation
r.x = C.int(c.x)
r.y = C.int(c.y)
r.width = C.int(c.width)
r.height = C.int(c.height)
C.gtk_widget_size_allocate(w, &r)
}
func basegetAuxResizeInfo(c Control, d *sizing) {
// controls set this to true if a Label to its left should be vertically aligned to the control's top
d.shouldVAlignTop = false
}
type scroller struct {
scrollwidget *C.GtkWidget
scrollcontainer *C.GtkContainer
scrollwindow *C.GtkScrolledWindow
}
func newScroller(widget *C.GtkWidget, native bool) *scroller {
scrollwidget := C.gtk_scrolled_window_new(nil, nil)
s := &scroller{
scrollwidget: scrollwidget,
scrollcontainer: (*C.GtkContainer)(unsafe.Pointer(scrollwidget)),
scrollwindow: (*C.GtkScrolledWindow)(unsafe.Pointer(scrollwidget)),
}
// give the scrolled window a border (thanks to jlindgren in irc.gimp.net/#gtk+)
C.gtk_scrolled_window_set_shadow_type(s.scrollwindow, C.GTK_SHADOW_IN)
// TODO use native here
C.gtk_container_add(s.scrollcontainer, widget)
return s
}
func (s *scroller) setParent(p *controlParent) {
C.gtk_container_add(p.c, s.scrollwidget)
// TODO for when hiding/showing is implemented
C.gtk_widget_show_all(s.scrollwidget)
}
func (s *scroller) commitResize(c *allocation, d *sizing) {
dobasecommitResize(s.scrollwidget, c, d)
}
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