121 lines
3.1 KiB
Go
121 lines
3.1 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 doEditableComboboxOnChanged(uiCombobox *, void *);
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// static inline void realuiEditableComboboxOnChanged(uiCombobox *c)
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// {
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// uiEditableComboboxOnChanged(c, doEditableComboboxOnChanged, 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 editableComboboxes = make(map[*C.uiEditableCombobox]*Combobox)
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// EditableCombobox is a Control that represents a drop-down list
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// of strings that the user can choose one of at any time. It also has
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// an entry field that the user can type an alternate choice into.
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type EditableCombobox struct {
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co *C.uiControl
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c *C.uiEditableCombobox
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onChanged func(*EditableCombobox)
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}
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// NewEditableCombobox creates a new EditableCombobox.
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func NewEditableCombobox() *EditableCombobox {
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c := new(EditableCombobox)
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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.realuiEditableComboboxOnChanged(c.c)
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editableComboboxes[c.c] = c
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return c
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}
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// Destroy destroys the EditableCombobox.
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func (c *Combobox) Destroy() {
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delete(editableComboboxes, 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 EditableCombobox. This is only used by package ui itself and
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// should 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 EditableCombobox.
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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.
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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 EditableCombobox.
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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 EditableCombobox.
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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 EditableCombobox.
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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 EditableCombobox.
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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 EditableCombobox.
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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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// Text returns the text in the entry of the EditableCombobox, which
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// could be one of the choices in the list if the user has selected one.
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func (c *Combobox) Text() string {
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ctext := C.uiEditableComboboxText(c.c)
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text := C.GoString(ctext)
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C.uiFreeText(ctext)
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return text
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}
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// SetText sets the text in the entry of the EditableCombobox.
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func (c *Combobox) SetText(index int) {
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ctext := C.CString(text)
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C.uiEditableComboboxSetText(c.c, ctext)
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freestr(ctext)
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}
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// OnChanged 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) OnChanged(f func(*Combobox)) {
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c.onChanged = f
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}
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//export doComboboxOnChanged
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func doComboboxOnChanged(cc *C.uiCombobox, data unsafe.Pointer) {
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c := editableComboboxes[cc]
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if c.onChanged != nil {
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c.onChanged(c)
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}
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}
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