66 lines
1.5 KiB
Go
66 lines
1.5 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 doButtonOnClicked(uiButton *, void *);
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// // see golang/go#19835
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// typedef void (*buttonCallback)(uiButton *, void *);
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import "C"
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// Button is a Control that represents a button that the user can
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// click to perform an action. A Button has a text label that should
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// describe what the button does.
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type Button struct {
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ControlBase
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b *C.uiButton
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onClicked func(*Button)
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}
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// NewButton creates a new Button with the given text as its label.
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func NewButton(text string) *Button {
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b := new(Button)
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ctext := C.CString(text)
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b.b = C.uiNewButton(ctext)
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freestr(ctext)
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C.uiButtonOnClicked(b.b, C.buttonCallback(C.doButtonOnClicked), nil)
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b.ControlBase = NewControlBase(b, uintptr(unsafe.Pointer(b.b)))
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return b
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}
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// Text returns the Button's text.
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func (b *Button) Text() string {
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ctext := C.uiButtonText(b.b)
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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 Button's text to text.
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func (b *Button) SetText(text string) {
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ctext := C.CString(text)
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C.uiButtonSetText(b.b, ctext)
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freestr(ctext)
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}
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// OnClicked registers f to be run when the user clicks the Button.
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// Only one function can be registered at a time.
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func (b *Button) OnClicked(f func(*Button)) {
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b.onClicked = f
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}
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//export doButtonOnClicked
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func doButtonOnClicked(bb *C.uiButton, data unsafe.Pointer) {
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b := ControlFromLibui(uintptr(unsafe.Pointer(bb))).(*Button)
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if b.onClicked != nil {
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b.onClicked(b)
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}
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}
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