136 lines
2.6 KiB
Go
136 lines
2.6 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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"github.com/lxn/win"
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)
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type RadioButtonGroup struct {
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buttons []*RadioButton
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checkedButton *RadioButton
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}
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func (rbg *RadioButtonGroup) Buttons() []*RadioButton {
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buttons := make([]*RadioButton, len(rbg.buttons))
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copy(buttons, rbg.buttons)
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return buttons
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}
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func (rbg *RadioButtonGroup) CheckedButton() *RadioButton {
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return rbg.checkedButton
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}
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type radioButtonish interface {
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radioButton() *RadioButton
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}
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type RadioButton struct {
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Button
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group *RadioButtonGroup
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value interface{}
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}
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func NewRadioButton(parent Container) (*RadioButton, error) {
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rb := new(RadioButton)
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if count := parent.Children().Len(); count > 0 {
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if prevRB, ok := parent.Children().At(count - 1).(radioButtonish); ok {
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rb.group = prevRB.radioButton().group
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}
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}
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var groupBit uint32
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if rb.group == nil {
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groupBit = win.WS_GROUP
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rb.group = new(RadioButtonGroup)
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}
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if err := InitWidget(
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rb,
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parent,
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"BUTTON",
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groupBit|win.WS_TABSTOP|win.WS_VISIBLE|win.BS_AUTORADIOBUTTON,
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0); err != nil {
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return nil, err
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}
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rb.Button.init()
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rb.SetBackground(nullBrushSingleton)
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rb.GraphicsEffects().Add(InteractionEffect)
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rb.GraphicsEffects().Add(FocusEffect)
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rb.MustRegisterProperty("CheckedValue", NewProperty(
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func() interface{} {
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if rb.Checked() {
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return rb.value
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}
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return nil
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},
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func(v interface{}) error {
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checked := v == rb.value
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if checked {
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rb.group.checkedButton = rb
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}
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rb.SetChecked(checked)
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return nil
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},
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rb.CheckedChanged()))
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rb.group.buttons = append(rb.group.buttons, rb)
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return rb, nil
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}
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func (rb *RadioButton) radioButton() *RadioButton {
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return rb
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}
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func (rb *RadioButton) TextOnLeftSide() bool {
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return rb.hasStyleBits(win.BS_LEFTTEXT)
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}
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func (rb *RadioButton) SetTextOnLeftSide(textLeft bool) error {
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return rb.ensureStyleBits(win.BS_LEFTTEXT, textLeft)
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}
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func (rb *RadioButton) Group() *RadioButtonGroup {
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return rb.group
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}
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func (rb *RadioButton) Value() interface{} {
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return rb.value
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}
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func (rb *RadioButton) SetValue(value interface{}) {
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rb.value = value
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}
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func (rb *RadioButton) 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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prevChecked := rb.group.checkedButton
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rb.group.checkedButton = rb
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if prevChecked != rb {
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if prevChecked != nil {
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prevChecked.setChecked(false)
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}
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rb.setChecked(true)
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}
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}
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}
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return rb.Button.WndProc(hwnd, msg, wParam, lParam)
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}
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