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