#region LGPL License
/*************************************************************************
Crazy Eddie's GUI System (http://crayzedsgui.sourceforge.net)
Copyright (C)2004 Paul D Turner (crayzed@users.sourceforge.net)
C# Port developed by Chris McGuirk (leedgitar@latenitegames.com)
Compatible with the Axiom 3D Engine (http://axiomengine.sf.net)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*************************************************************************/
#endregion LGPL License
using System;
namespace CrayzEdsGui.Base.Widgets{
/// <summary>
/// Summary description for RadioButton.
/// </summary>
/// C++ Version Sync
/// .cpp: 1.4
/// .h: 1.2
public abstract class RadioButton : BaseButton {
#region Fields
/// <summary>
/// true if radio button is selected (has checkmark).
/// </summary>
protected bool isChecked;
/// <summary>
/// Radio button group ID.
/// </summary>
protected int groupID;
#endregion Fields
#region Constructor
/// <summary>
/// Constructor.
/// </summary>
/// <param name="type"></param>
/// <param name="name"></param>
public RadioButton(string name) : base(name) {
}
#endregion Constructor
#region Properties
/// <summary>
/// Get/Set the checked state of the checkbox.
/// </summary>
/// <value>
/// true to select the widget and give it the checkmark.
/// false to deselect the widget and remove the checkmark.
/// </value>
[WidgetProperty( "Selected" )]
public bool Checked
{
get {
return isChecked;
}
set {
if (value != isChecked) {
isChecked = value;
// if new state is 'checked', de-select any other buttons in our group
if(isChecked) {
DeselectOtherButtonsInGroup();
}
// event notification
OnCheckStateChanged(new WindowEventArgs(this));
}
}
}
/// <summary>
/// Get/Set the group ID for this radio button.
/// </summary>
/// <value>Integer value that holds the group ID which this radio button belongs to.</value>
[WidgetProperty( "GroupID" )]
public int GroupID
{
get {
return groupID;
}
set {
groupID = value;
// if new state is 'checked', de-select any other buttons in our group
if(isChecked) {
DeselectOtherButtonsInGroup();
}
}
}
#endregion Properties
#region Methods
/// <summary>
/// Deselect any selected radio buttons attached to the same parent within the same group
/// (but not do not deselect 'this').
/// </summary>
protected void DeselectOtherButtonsInGroup() {
// nothing to do unless we are attached to another window
if(parent != null) {
int childCount = parent.ChildCount;
// scan all children
for(int i = 0; i < childCount; i++) {
Window child = parent.GetChildAtIndex(i);
if(child is RadioButton) {
RadioButton button = (RadioButton)child;
// if it is enabled, is not this, and belongs to our group..
if(button.Checked && button != this && button.GroupID == groupID) {
// .. disable it
button.Checked = false;
}
}
}
}
}
#endregion Methods
#region Events
#region Event Declarations
/// <summary>
/// Event triggered internally when state of check-box changes.
/// </summary>
public event WindowEventHandler CheckStateChanged;
#endregion Event Declarations
#region Trigger Methods
/// <summary>
/// Event triggered internally when state of checkbox changes.
/// </summary>
/// <param name="e">Event arguments.</param>
protected internal void OnCheckStateChanged(WindowEventArgs e) {
// redraw the widget
RequestRedraw();
if(CheckStateChanged != null) {
CheckStateChanged(this, e);
}
}
#endregion Trigger Methods
#region Overridden Trigger Methods
/// <summary>
/// When the mouse up occurs, we change the selected state.
/// </summary>
/// <param name="e"></param>
protected internal override void OnMouseButtonUp(MouseEventArgs e) {
if ((e.Button == MouseButton.Left) && IsPushed) {
Window sheet = GuiSystem.Instance.GuiSheet;
if (sheet != null) {
// if mouse was released over this widget
if (this == sheet.GetChildAtPosition(e.Position)) {
// toggle selected state, which will deselect all other radio buttons in our group
if(!isChecked) {
Checked = true;
}
}
}
// we handled this one
e.Handled = true;
}
// default processing
base.OnMouseButtonUp (e);
}
#endregion Overridden Trigger Methods
#endregion Events
}
}
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