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// +build !windows,!darwin
// 7 july 2014
package ui
import (
"unsafe"
)
// #include "gtk_unix.h"
// extern void buttonClicked(GtkButton *, gpointer);
// extern void checkboxToggled(GtkToggleButton *, gpointer);
import "C"
type widgetbase struct {
widget *C.GtkWidget
parentw *window
floating bool
}
func newWidget(w *C.GtkWidget) *widgetbase {
return &widgetbase{
widget: w,
}
}
// these few methods are embedded by all the various Controls since they all will do the same thing
func (w *widgetbase) unparent() {
if w.parentw != nil {
// add another reference so it doesn't get removed by accident
C.g_object_ref(C.gpointer(unsafe.Pointer(w.widget)))
// we unref this in parent() below
w.floating = true
C.gtk_container_remove(w.parentw.layoutc, w.widget)
w.parentw = nil
}
}
func (w *widgetbase) parent(win *window) {
C.gtk_container_add(win.layoutc, w.widget)
w.parentw = win
// was previously parented; unref our saved ref
if w.floating {
C.g_object_unref(C.gpointer(unsafe.Pointer(w.widget)))
w.floating = false
}
// make sure the new widget is shown
C.gtk_widget_show_all(w.widget)
}
type button struct {
*widgetbase
button *C.GtkButton
clicked *event
}
// shared code for setting up buttons, check boxes, etc.
func finishNewButton(widget *C.GtkWidget, event string, handler unsafe.Pointer) *button {
b := &button{
widgetbase: newWidget(widget),
button: (*C.GtkButton)(unsafe.Pointer(widget)),
clicked: newEvent(),
}
g_signal_connect(
C.gpointer(unsafe.Pointer(b.button)),
event,
C.GCallback(handler),
C.gpointer(unsafe.Pointer(b)))
return b
}
func newButton(text string) *button {
ctext := togstr(text)
defer freegstr(ctext)
widget := C.gtk_button_new_with_label(ctext)
return finishNewButton(widget, "clicked", C.buttonClicked)
}
func (b *button) OnClicked(e func()) {
b.clicked.set(e)
}
//export buttonClicked
func buttonClicked(bwid *C.GtkButton, data C.gpointer) {
b := (*button)(unsafe.Pointer(data))
b.clicked.fire()
println("button clicked")
}
func (b *button) Text() string {
return fromgstr(C.gtk_button_get_label(b.button))
}
func (b *button) SetText(text string) {
ctext := togstr(text)
defer freegstr(ctext)
C.gtk_button_set_label(b.button, ctext)
}
type checkbox struct {
// embed button so its methods and events carry over
*button
toggle *C.GtkToggleButton
checkbox *C.GtkCheckButton
}
func newCheckbox(text string) *checkbox {
ctext := togstr(text)
defer freegstr(ctext)
widget := C.gtk_check_button_new_with_label(ctext)
return &checkbox{
button: finishNewButton(widget, "toggled", C.checkboxToggled),
toggle: (*C.GtkToggleButton)(unsafe.Pointer(widget)),
checkbox: (*C.GtkCheckButton)(unsafe.Pointer(widget)),
}
}
//export checkboxToggled
func checkboxToggled(bwid *C.GtkToggleButton, data C.gpointer) {
// note that the finishNewButton() call uses the embedded *button as data
// this is fine because we're only deferring to buttonClicked() anyway
buttonClicked(nil, data)
}
func (c *checkbox) Checked() bool {
return fromgbool(C.gtk_toggle_button_get_active(c.toggle))
}
func (c *checkbox) SetChecked(checked bool) {
C.gtk_toggle_button_set_active(c.toggle, togbool(checked))
}
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