143 lines
2.9 KiB
Go
143 lines
2.9 KiB
Go
// Copyright 2010 The Walk Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows
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package walk
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import (
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"strconv"
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"github.com/lxn/win"
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)
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type CheckState int
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const (
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CheckUnchecked CheckState = win.BST_UNCHECKED
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CheckChecked CheckState = win.BST_CHECKED
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CheckIndeterminate CheckState = win.BST_INDETERMINATE
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)
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var checkBoxCheckSize Size // in native pixels
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type CheckBox struct {
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Button
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checkStateChangedPublisher EventPublisher
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}
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func NewCheckBox(parent Container) (*CheckBox, error) {
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cb := new(CheckBox)
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if err := InitWidget(
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cb,
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parent,
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"BUTTON",
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win.WS_TABSTOP|win.WS_VISIBLE|win.BS_AUTOCHECKBOX,
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0); err != nil {
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return nil, err
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}
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cb.Button.init()
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cb.SetBackground(nullBrushSingleton)
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cb.GraphicsEffects().Add(InteractionEffect)
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cb.GraphicsEffects().Add(FocusEffect)
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cb.MustRegisterProperty("CheckState", NewProperty(
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func() interface{} {
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return cb.CheckState()
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},
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func(v interface{}) error {
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cb.SetCheckState(CheckState(assertIntOr(v, 0)))
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return nil
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},
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cb.CheckStateChanged()))
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return cb, nil
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}
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func (cb *CheckBox) TextOnLeftSide() bool {
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return cb.hasStyleBits(win.BS_LEFTTEXT)
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}
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func (cb *CheckBox) SetTextOnLeftSide(textLeft bool) error {
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return cb.ensureStyleBits(win.BS_LEFTTEXT, textLeft)
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}
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func (cb *CheckBox) setChecked(checked bool) {
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cb.Button.setChecked(checked)
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cb.checkStateChangedPublisher.Publish()
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}
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func (cb *CheckBox) Tristate() bool {
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return cb.hasStyleBits(win.BS_AUTO3STATE)
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}
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func (cb *CheckBox) SetTristate(tristate bool) error {
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var set, clear uint32
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if tristate {
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set, clear = win.BS_AUTO3STATE, win.BS_AUTOCHECKBOX
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} else {
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set, clear = win.BS_AUTOCHECKBOX, win.BS_AUTO3STATE
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}
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return cb.setAndClearStyleBits(set, clear)
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}
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func (cb *CheckBox) CheckState() CheckState {
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return CheckState(cb.SendMessage(win.BM_GETCHECK, 0, 0))
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}
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func (cb *CheckBox) SetCheckState(state CheckState) {
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if state == cb.CheckState() {
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return
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}
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cb.SendMessage(win.BM_SETCHECK, uintptr(state), 0)
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cb.checkedChangedPublisher.Publish()
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cb.checkStateChangedPublisher.Publish()
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}
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func (cb *CheckBox) CheckStateChanged() *Event {
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return cb.checkStateChangedPublisher.Event()
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}
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func (cb *CheckBox) SaveState() error {
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return cb.WriteState(strconv.Itoa(int(cb.CheckState())))
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}
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func (cb *CheckBox) RestoreState() error {
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s, err := cb.ReadState()
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if err != nil {
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return err
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}
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cs, err := strconv.Atoi(s)
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if err != nil {
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return err
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}
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cb.SetCheckState(CheckState(cs))
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return nil
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}
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func (cb *CheckBox) WndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) uintptr {
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switch msg {
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case win.WM_COMMAND:
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switch win.HIWORD(uint32(wParam)) {
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case win.BN_CLICKED:
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cb.checkedChangedPublisher.Publish()
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cb.checkStateChangedPublisher.Publish()
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}
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}
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return cb.Button.WndProc(hwnd, msg, wParam, lParam)
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}
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