67 lines
1.8 KiB
Go
67 lines
1.8 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 doRadioButtonsOnSelected(uiRadioButtons *, void *);
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// // see golang/go#19835
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// typedef void (*radioButtonsCallback)(uiRadioButtons *, void *);
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import "C"
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// RadioButtons is a Control that represents a set of checkable
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// buttons from which exactly one may be chosen by the user.
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type RadioButtons struct {
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ControlBase
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r *C.uiRadioButtons
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onSelected func(*RadioButtons)
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}
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// NewRadioButtons creates a new RadioButtons.
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func NewRadioButtons() *RadioButtons {
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r := new(RadioButtons)
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r.r = C.uiNewRadioButtons()
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C.uiRadioButtonsOnSelected(r.r, C.radioButtonsCallback(C.doRadioButtonsOnSelected), nil)
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r.ControlBase = NewControlBase(r, uintptr(unsafe.Pointer(r.r)))
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return r
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}
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// Append adds the named button to the end of the RadioButtons.
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func (r *RadioButtons) Append(text string) {
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ctext := C.CString(text)
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C.uiRadioButtonsAppend(r.r, ctext)
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freestr(ctext)
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}
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// Selected returns the index of the currently selected option in the
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// RadioButtons, or -1 if no item is selected.
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func (r *RadioButtons) Selected() int {
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return int(C.uiRadioButtonsSelected(r.r))
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}
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// SetSelected sets the currently selected option in the RadioButtons
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// to index.
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func (r *RadioButtons) SetSelected(index int) {
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C.uiRadioButtonsSetSelected(r.r, C.int(index))
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}
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// OnSelected registers f to be run when the user selects an option in
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// the RadioButtons. Only one function can be registered at a time.
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func (r *RadioButtons) OnSelected(f func(*RadioButtons)) {
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r.onSelected = f
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}
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//export doRadioButtonsOnSelected
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func doRadioButtonsOnSelected(rr *C.uiRadioButtons, data unsafe.Pointer) {
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r := ControlFromLibui(uintptr(unsafe.Pointer(rr))).(*RadioButtons)
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if r.onSelected != nil {
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r.onSelected(r)
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}
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}
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