115 lines
2.5 KiB
Go
115 lines
2.5 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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// static inline void realuiButtonOnClicked(uiButton *b)
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// {
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// uiButtonOnClicked(b, doButtonOnClicked, 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 buttons = make(map[*C.uiButton]*Button)
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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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c *C.uiControl
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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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b.c = (*C.uiControl)(unsafe.Pointer(b.b))
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freestr(ctext)
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C.realuiButtonOnClicked(b.b)
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buttons[b.b] = b
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return b
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}
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// Destroy destroys the Button.
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func (b *Button) Destroy() {
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delete(buttons, b.b)
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C.uiControlDestroy(b.c)
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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 (b *Button) LibuiControl() uintptr {
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return uintptr(unsafe.Pointer(b.c))
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}
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// Handle returns the OS-level handle associated with this Button.
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// On Windows this is an HWND of a standard Windows API BUTTON
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// class (as provided by Common Controls version 6).
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// On GTK+ this is a pointer to a GtkButton.
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// On OS X this is a pointer to a NSButton.
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func (b *Button) Handle() uintptr {
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return uintptr(C.uiControlHandle(b.c))
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}
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// Show shows the Button.
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func (b *Button) Show() {
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C.uiControlShow(b.c)
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}
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// Hide hides the Button.
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func (b *Button) Hide() {
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C.uiControlHide(b.c)
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}
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// Enable enables the Button.
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func (b *Button) Enable() {
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C.uiControlEnable(b.c)
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}
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// Disable disables the Button.
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func (b *Button) Disable() {
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C.uiControlDisable(b.c)
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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 := buttons[bb]
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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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