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// 15 july 2014
package ui
import (
"unsafe"
)
// #include "winapi_windows.h"
import "C"
type checkbox struct {
*controlbase
toggled *event
}
func newCheckbox(text string) *checkbox {
// don't use BS_AUTOCHECKBOX here because it creates problems when refocusing (see http://blogs.msdn.com/b/oldnewthing/archive/2014/05/22/10527522.aspx)
// we'll handle actually toggling the check state ourselves (see controls_windows.c)
cc := newControl(buttonclass,
C.BS_CHECKBOX | C.WS_TABSTOP,
0)
cc.setText(text)
C.controlSetControlFont(cc.hwnd)
c := &checkbox{
controlbase: cc,
toggled: newEvent(),
}
C.setCheckboxSubclass(c.hwnd, unsafe.Pointer(c))
return c
}
func (c *checkbox) OnToggled(e func()) {
c.toggled.set(e)
}
func (c *checkbox) Text() string {
return c.text()
}
func (c *checkbox) SetText(text string) {
c.setText(text)
}
func (c *checkbox) Checked() bool {
return C.checkboxChecked(c.hwnd) != C.FALSE
}
func (c *checkbox) SetChecked(checked bool) {
if checked {
C.checkboxSetChecked(c.hwnd, C.TRUE)
return
}
C.checkboxSetChecked(c.hwnd, C.FALSE)
}
//export checkboxToggled
func checkboxToggled(data unsafe.Pointer) {
c := (*checkbox)(data)
c.toggled.fire()
println("checkbox toggled")
}
func (c *checkbox) setParent(p *controlParent) {
basesetParent(c.controlbase, p)
}
func (c *checkbox) containerShow() {
basecontainerShow(c.controlbase)
}
func (c *checkbox) containerHide() {
basecontainerHide(c.controlbase)
}
func (c *checkbox) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
return baseallocate(c, x, y, width, height, d)
}
const (
// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
checkboxHeight = 10
// from http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
checkboxXFromLeftOfBoxToLeftOfLabel = 12
)
func (c *checkbox) preferredSize(d *sizing) (width, height int) {
return fromdlgunitsX(checkboxXFromLeftOfBoxToLeftOfLabel, d) + int(c.textlen),
fromdlgunitsY(checkboxHeight, d)
}
func (c *checkbox) commitResize(a *allocation, d *sizing) {
basecommitResize(c.controlbase, a, d)
}
func (c *checkbox) getAuxResizeInfo(d *sizing) {
basegetAuxResizeInfo(c, d)
}
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