104 lines
2.2 KiB
Go
104 lines
2.2 KiB
Go
// 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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_hwnd C.HWND
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_textlen C.LONG
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toggled *event
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}
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func newCheckbox(text string) *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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hwnd := C.newControl(buttonclass,
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C.BS_CHECKBOX | C.WS_TABSTOP,
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0)
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c := &checkbox{
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_hwnd: hwnd,
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toggled: newEvent(),
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}
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c.SetText(text)
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C.controlSetControlFont(c._hwnd)
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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) OnToggled(e func()) {
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c.toggled.set(e)
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}
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func (c *checkbox) Text() string {
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return baseText(c)
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}
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func (c *checkbox) SetText(text string) {
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baseSetText(c, text)
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}
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func (c *checkbox) Checked() bool {
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return C.checkboxChecked(c._hwnd) != C.FALSE
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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.toggled.fire()
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println("checkbox toggled")
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}
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func (c *checkbox) hwnd() C.HWND {
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return c._hwnd
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}
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func (c *checkbox) textlen() C.LONG {
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return c._textlen
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}
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func (c *checkbox) settextlen(len C.LONG) {
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c._textlen = len
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}
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func (c *checkbox) setParent(p *controlParent) {
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basesetParent(c, p)
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}
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func (c *checkbox) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
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return baseallocate(c, x, y, width, height, d)
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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) preferredSize(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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func (c *checkbox) commitResize(a *allocation, d *sizing) {
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basecommitResize(c, a, d)
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}
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func (c *checkbox) getAuxResizeInfo(d *sizing) {
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basegetAuxResizeInfo(c, d)
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}
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