1 files changed, 63 insertions, 0 deletions
diff --git a/button.go b/button.go
new file mode 100644
index 0000000..a0c4e67
--- /dev/null
+++ b/button.go
@@ -0,0 +1,63 @@
+// 12 december 2015
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "ui.h"
+// extern void doButtonOnClicked(uiButton *, void *);
+import "C"
+
+// Button is a Control that represents a button that the user can
+// click to perform an action. A Button has a text label that should
+// describe what the button does.
+type Button struct {
+	ControlBase
+	b	*C.uiButton
+	onClicked		func(*Button)
+}
+
+// NewButton creates a new Button with the given text as its label.
+func NewButton(text string) *Button {
+	b := new(Button)
+
+	ctext := C.CString(text)
+	b.b = C.uiNewButton(ctext)
+	freestr(ctext)
+
+	C.uiButtonOnClicked(b.b, C.doButtonOnClicked, nil)
+
+	b.ControlBase = NewControlBase(b, uintptr(unsafe.Pointer(b.b)))
+	return b
+}
+
+// Text returns the Button's text.
+func (b *Button) Text() string {
+	ctext := C.uiButtonText(b.b)
+	text := C.GoString(ctext)
+	C.uiFreeText(ctext)
+	return text
+}
+
+// SetText sets the Button's text to text.
+func (b *Button) SetText(text string) {
+	ctext := C.CString(text)
+	C.uiButtonSetText(b.b, ctext)
+	freestr(ctext)
+}
+
+// OnClicked registers f to be run when the user clicks the Button.
+// Only one function can be registered at a time.
+func (b *Button) OnClicked(f func(*Button)) {
+	b.onClicked = f
+}
+
+//export doButtonOnClicked
+func doButtonOnClicked(bb *C.uiButton, data unsafe.Pointer) {
+	b := ControlFromLibui(uintptr(unsafe.Pointer(bb))).(*Button)
+	if b.onClicked != nil {
+		b.onClicked(b)
+	}
+}