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// 12 december 2015
package ui
import (
"unsafe"
)
// #include "ui.h"
// extern void doComboboxOnSelected(uiCombobox *, void *);
// static inline void realuiComboboxOnSelected(uiCombobox *c)
// {
// uiComboboxOnSelected(c, doComboboxOnSelected, NULL);
// }
import "C"
// no need to lock this; only the GUI thread can access it
var comboboxes = make(map[*C.uiCombobox]*Combobox)
// Combobox is a Control that represents a drop-down list of strings
// that the user can choose one of at any time. For a Combobox that
// users can type values into, see EditableCombobox.
type Combobox struct {
co *C.uiControl
c *C.uiCombobox
onSelected func(*Combobox)
}
// NewCombobox creates a new Combobox.
func NewCombobox() *Combobox {
c := new(Combobox)
c.c = C.uiNewCombobox()
c.co = (*C.uiControl)(unsafe.Pointer(c.c))
C.realuiComboboxOnSelected(c.c)
comboboxes[c.c] = c
return c
}
// Destroy destroys the Combobox.
func (c *Combobox) Destroy() {
delete(comboboxes, c.c)
C.uiControlDestroy(c.co)
}
// LibuiControl returns the libui uiControl pointer that backs
// the Window. This is only used by package ui itself and should
// not be called by programs.
func (c *Combobox) LibuiControl() uintptr {
return uintptr(unsafe.Pointer(c.co))
}
// Handle returns the OS-level handle associated with this Combobox.
// On Windows this is an HWND of a standard Windows API COMBOBOX
// class (as provided by Common Controls version 6).
// On GTK+ this is a pointer to a GtkComboBoxText.
// On OS X this is a pointer to a NSPopUpButton.
func (c *Combobox) Handle() uintptr {
return uintptr(C.uiControlHandle(c.co))
}
// Show shows the Combobox.
func (c *Combobox) Show() {
C.uiControlShow(c.co)
}
// Hide hides the Combobox.
func (c *Combobox) Hide() {
C.uiControlHide(c.co)
}
// Enable enables the Combobox.
func (c *Combobox) Enable() {
C.uiControlEnable(c.co)
}
// Disable disables the Combobox.
func (c *Combobox) Disable() {
C.uiControlDisable(c.co)
}
// Append adds the named item to the end of the Combobox.
func (c *Combobox) Append(text string) {
ctext := C.CString(text)
C.uiComboboxAppend(c.c, ctext)
freestr(ctext)
}
// Selected returns the index of the currently selected item in the
// Combobox, or -1 if nothing is selected.
func (c *Combobox) Selected() int {
return int(C.uiComboboxSelected(c.c))
}
// SetChecked sets the currently select item in the Combobox
// to index. If index is -1 no item will be selected.
func (c *Combobox) SetSelected(index int) {
C.uiComboboxSetSelected(c.c, C.intmax_t(index))
}
// OnSelected registers f to be run when the user selects an item in
// the Combobox. Only one function can be registered at a time.
func (c *Combobox) OnSelected(f func(*Combobox)) {
c.onSelected = f
}
//export doComboboxOnSelected
func doComboboxOnSelected(cc *C.uiCombobox, data unsafe.Pointer) {
c := comboboxes[cc]
if c.onSelected != nil {
c.onSelected(c)
}
}
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