60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
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// 15 july 2014
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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 "winapi_windows.h"
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import "C"
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type checkbox struct {
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*button
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}
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func newCheckbox(text string) *checkbox {
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c := &checkbox{
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// 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)
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// we'll handle actually toggling the check state ourselves (see controls_windows.c)
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button: startNewButton(text, C.BS_CHECKBOX),
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}
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c.fpreferredSize = c.checkboxpreferredSize
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C.setCheckboxSubclass(c.hwnd, unsafe.Pointer(c))
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return c
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}
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func (c *checkbox) Checked() bool {
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if C.checkboxChecked(c.hwnd) == C.FALSE {
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return false
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}
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return true
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}
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func (c *checkbox) SetChecked(checked bool) {
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if checked {
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C.checkboxSetChecked(c.hwnd, C.TRUE)
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return
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}
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C.checkboxSetChecked(c.hwnd, C.FALSE)
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}
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//export checkboxToggled
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func checkboxToggled(data unsafe.Pointer) {
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c := (*checkbox)(data)
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c.clicked.fire()
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println("checkbox toggled")
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}
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const (
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// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
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checkboxHeight = 10
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// from http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
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checkboxXFromLeftOfBoxToLeftOfLabel = 12
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)
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func (c *checkbox) checkboxpreferredSize(d *sizing) (width, height int) {
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return fromdlgunitsX(checkboxXFromLeftOfBoxToLeftOfLabel, d) + int(c.textlen),
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fromdlgunitsY(checkboxHeight, d)
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}
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