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// +build !windows,!darwin
// 23 february 2014
package ui
import (
"unsafe"
"fmt"
)
// #include "gtk_unix.h"
// extern void containerResizing(GtkWidget *, GdkRectangle *, gpointer);
import "C"
type container struct {
containerbase
layoutwidget *C.GtkWidget
layoutcontainer *C.GtkContainer
layout *C.GtkLayout
}
func newContainer(child Control) *container {
widget := C.gtk_layout_new(nil, nil)
c := &container{
layoutwidget: widget,
layoutcontainer: (*C.GtkContainer)(unsafe.Pointer(widget)),
layout: (*C.GtkLayout)(unsafe.Pointer(widget)),
}
c.child = child
c.child.setParent(&controlParent{c.layoutcontainer})
// we connect to the layout's size-allocate, not to the window's configure-event
// this allows us to handle client-side decoration-based configurations (such as GTK+ on Wayland) properly
// also see basecommitResize() in control_unix.go for additional notes
// thanks to many people in irc.gimp.net/#gtk+ for help (including tristan for suggesting g_signal_connect_after())
g_signal_connect_after(
C.gpointer(unsafe.Pointer(c.layout)),
"size-allocate",
C.GCallback(C.containerResizing),
C.gpointer(unsafe.Pointer(c)))
return c
}
//export containerResizing
func containerResizing(wid *C.GtkWidget, r *C.GdkRectangle, data C.gpointer) {
c := (*container)(unsafe.Pointer(data))
// the GtkLayout's coordinate system is localized, so the origin is (0, 0)
c.resize(0, 0, int(r.width), int(r.height))
fmt.Printf("new size %d x %d\n", r.width, r.height)
}
type sizing struct {
sizingbase
// for size calculations
// gtk+ needs nothing
// for the actual resizing
shouldVAlignTop bool
}
const (
gtkXMargin = 12
gtkYMargin = 12
gtkXPadding = 12
gtkYPadding = 6
)
func (c *container) beginResize() (d *sizing) {
d = new(sizing)
if spaced {
d.xmargin = gtkXMargin
d.ymargin = gtkYMargin
d.xpadding = gtkXPadding
d.ypadding = gtkYPadding
}
return d
}
func (c *container) translateAllocationCoords(allocations []*allocation, winwidth, winheight int) {
// no need for coordinate conversion with gtk+
}
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