Migrated colorbutton.go back.

1 files changed, 62 insertions, 0 deletions

diff --git a/colorbutton.go b/colorbutton.go
new file mode 100644
index 0000000..6b1f525
--- /dev/null
+++ b/colorbutton.go
@@ -0,0 +1,62 @@
+// 12 december 2015
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "pkgui.h"
+import "C"
+
+// ColorButton is a Control that represents a button that the user can
+// click to select a color.
+type ColorButton struct {
+	ControlBase
+	b	*C.uiColorButton
+	onChanged		func(*ColorButton)
+}
+
+// NewColorButton creates a new ColorButton.
+func NewColorButton() *ColorButton {
+	b := new(ColorButton)
+
+	b.b = C.uiNewColorButton()
+
+	C.pkguiColorButtonOnChanged(b.b)
+
+	b.ControlBase = NewControlBase(b, uintptr(unsafe.Pointer(b.b)))
+	return b
+}
+
+// Color returns the color currently selected in the ColorButton.
+// Colors are not alpha-premultiplied.
+// TODO rename b or bl
+func (b *ColorButton) Color() (r, g, bl, a float64) {
+	c := C.pkguiNewColorDoubles()
+	defer C.pkguiFreeColorDoubles(c)
+	C.uiColorButtonColor(b.b, c.r, c.g, c.b, c.a)
+	return float64(*(c.r)), float64(*(c.g)), float64(*(c.b)), float64(*(c.a))
+}
+
+// SetColor sets the currently selected color in the ColorButton.
+// Colors are not alpha-premultiplied.
+// TODO rename b or bl
+func (b *ColorButton) SetColor(r, g, bl, a float64) {
+	C.uiColorButtonSetColor(b.b, C.double(r), C.double(g), C.double(bl), C.double(a))
+}
+
+// OnChanged registers f to be run when the user changes the
+// currently selected color in the ColorButton. Only one function
+// can be registered at a time.
+func (b *ColorButton) OnChanged(f func(*ColorButton)) {
+	b.onChanged = f
+}
+
+//export pkguiDoColorButtonOnChanged
+func pkguiDoColorButtonOnChanged(bb *C.uiColorButton, data unsafe.Pointer) {
+	b := ControlFromLibui(uintptr(unsafe.Pointer(bb))).(*ColorButton)
+	if b.onChanged != nil {
+		b.onChanged(b)
+	}
+}