113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
// +build !windows,!darwin
|
|
|
|
// 30 july 2014
|
|
|
|
package ui
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
|
|
// #include "gtk_unix.h"
|
|
import "C"
|
|
|
|
type controlbase struct {
|
|
*controldefs
|
|
widget *C.GtkWidget
|
|
}
|
|
|
|
type controlParent struct {
|
|
c *C.GtkContainer
|
|
}
|
|
|
|
func newControl(widget *C.GtkWidget) *controlbase {
|
|
c := new(controlbase)
|
|
c.widget = widget
|
|
c.controldefs = new(controldefs)
|
|
c.fsetParent = func(p *controlParent) {
|
|
C.gtk_container_add(p.c, c.widget)
|
|
// make sure the new widget is shown if not explicitly hidden
|
|
c.containerShow()
|
|
}
|
|
c.fcontainerShow = func() {
|
|
C.gtk_widget_show_all(c.widget)
|
|
}
|
|
c.fcontainerHide = func() {
|
|
C.gtk_widget_hide(c.widget)
|
|
}
|
|
c.fallocate = func(x int, y int, width int, height int, d *sizing) []*allocation {
|
|
// TODO split into its own function
|
|
return []*allocation{&allocation{
|
|
x: x,
|
|
y: y,
|
|
width: width,
|
|
height: height,
|
|
this: c,
|
|
}}
|
|
}
|
|
c.fpreferredSize = func(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)
|
|
}
|
|
c.fcommitResize = func(a *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(a.x)
|
|
r.y = C.int(a.y)
|
|
r.width = C.int(a.width)
|
|
r.height = C.int(a.height)
|
|
C.gtk_widget_size_allocate(c.widget, &r)
|
|
}
|
|
c.fgetAuxResizeInfo = func(d *sizing) {
|
|
//TODO
|
|
// d.shouldVAlignTop = (s.ctype == c_listbox) || (s.ctype == c_area)
|
|
d.shouldVAlignTop = false
|
|
}
|
|
return c
|
|
}
|
|
|
|
type scrolledcontrol struct {
|
|
*controlbase
|
|
scroller *controlbase
|
|
scrollcontainer *C.GtkContainer
|
|
scrollwindow *C.GtkScrolledWindow
|
|
}
|
|
|
|
func newScrolledControl(widget *C.GtkWidget, native bool) *scrolledcontrol {
|
|
scroller := C.gtk_scrolled_window_new(nil, nil)
|
|
s := &scrolledcontrol{
|
|
controlbase: newControl(widget),
|
|
scroller: newControl(scroller),
|
|
scrollcontainer: (*C.GtkContainer)(unsafe.Pointer(scroller)),
|
|
scrollwindow: (*C.GtkScrolledWindow)(unsafe.Pointer(scroller)),
|
|
}
|
|
// 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)
|
|
C.gtk_container_add(s.scrollcontainer, s.widget)
|
|
s.fsetParent = s.scroller.fsetParent
|
|
s.fcommitResize = s.scroller.fcommitResize
|
|
return s
|
|
}
|