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//
// System.Windows.Forms.TrackBar.cs
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//
// Copyright (c) 2004-2006 Novell, Inc.
//
// Authors:
// Jordi Mas i Hernandez, jordi@ximian.com
//
// TODO:
// - The AutoSize functionality seems quite broken for vertical controls in .Net 1.1. Not
// sure if we are implementing it the right way.
//
// NOT COMPLETE
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Timers;
namespace System.Windows.Forms
{
[Designer("System.Windows.Forms.Design.TrackBarDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
[DefaultEvent ("Scroll")]
[DefaultProperty("Value")]
public class TrackBar : Control, ISupportInitialize
{
private int minimum;
private int maximum;
internal int tickFrequency;
private bool autosize;
private int position;
private int smallChange;
private int largeChange;
private Orientation orientation;
private TickStyle tickStyle;
private Rectangle thumb_pos = new Rectangle (); /* Current position and size of the thumb */
private Rectangle thumb_area = new Rectangle (); /* Area where the thumb can scroll */
internal bool thumb_pressed = false;
private System.Timers.Timer holdclick_timer = new System.Timers.Timer ();
internal int thumb_mouseclick;
private bool mouse_clickmove;
#region events
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler BackgroundImageChanged;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler Click;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler DoubleClick;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler FontChanged;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler ForeColorChanged;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler ImeModeChanged;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event PaintEventHandler Paint;
public event EventHandler Scroll;
[Browsable (false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public new event EventHandler TextChanged;
public event EventHandler ValueChanged;
#endregion // Events
public TrackBar ()
{
orientation = Orientation.Horizontal;
minimum = 0;
maximum = 10;
tickFrequency = 1;
autosize = true;
position = 0;
tickStyle = TickStyle.BottomRight;
smallChange = 1;
largeChange = 5;
mouse_clickmove = false;
MouseDown += new MouseEventHandler (OnMouseDownTB);
MouseUp += new MouseEventHandler (OnMouseUpTB);
MouseMove += new MouseEventHandler (OnMouseMoveTB);
KeyDown += new KeyEventHandler (OnKeyDownTB);
holdclick_timer.Elapsed += new ElapsedEventHandler (OnFirstClickTimer);
SetStyle (ControlStyles.UserPaint | ControlStyles.Opaque, false);
}
#region Private & Internal Properties
internal Rectangle ThumbPos {
get {
return thumb_pos;
}
set {
thumb_pos = value;
}
}
internal Rectangle ThumbArea {
get {
return thumb_area;
}
set {
thumb_area = value;
}
}
#endregion // Private & Internal Properties
#region Public Properties
[DefaultValue (true)]
public bool AutoSize {
get { return autosize; }
set { autosize = value;}
}
[EditorBrowsable (EditorBrowsableState.Never)]
[Browsable (false)]
public override Image BackgroundImage {
get { return base.BackgroundImage; }
set {
if (base.BackgroundImage == value)
return;
if (BackgroundImageChanged != null)
BackgroundImageChanged (this, EventArgs.Empty);
base.BackgroundImage = value;
}
}
protected override CreateParams CreateParams {
get {
return base.CreateParams;
}
}
protected override ImeMode DefaultImeMode {
get {return ImeMode.Disable; }
}
protected override Size DefaultSize {
get { return ThemeEngine.Current.TrackBarDefaultSize; }
}
[Browsable(false)]
[EditorBrowsable (EditorBrowsableState.Never)]
public override Font Font {
get { return base.Font; }
set { base.Font = value; }
}
[EditorBrowsable (EditorBrowsableState.Never)]
[Browsable (false)]
public override Color ForeColor {
get { return base.ForeColor; }
set {
if (value == base.ForeColor)
return;
if (ForeColorChanged != null)
ForeColorChanged (this, EventArgs.Empty);
Refresh ();
}
}
[EditorBrowsable (EditorBrowsableState.Never)]
[Browsable (false)]
public new ImeMode ImeMode {
get { return base.ImeMode; }
set {
if (value == base.ImeMode)
return;
base.ImeMode = value;
if (ImeModeChanged != null)
ImeModeChanged (this, EventArgs.Empty);
}
}
[DefaultValue (5)]
public int LargeChange
{
get { return largeChange; }
set {
if (value < 0)
throw new Exception( string.Format("Value '{0}' must be greater than or equal to 0.", value));
largeChange = value;
}
}
[DefaultValue (10)]
[RefreshProperties (RefreshProperties.All)]
public int Maximum {
get { return maximum; }
set {
if (maximum != value) {
maximum = value;
if (maximum < minimum)
minimum = maximum;
Refresh ();
}
}
}
[DefaultValue (0)]
[RefreshProperties (RefreshProperties.All)]
public int Minimum {
get { return minimum; }
set {
if (Minimum != value) {
minimum = value;
if (minimum > maximum)
maximum = minimum;
Refresh ();
}
}
}
[DefaultValue (Orientation.Horizontal)]
[Localizable (true)]
public Orientation Orientation {
get { return orientation; }
set {
if (!Enum.IsDefined (typeof (Orientation), value))
throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for Orientation", value));
/* Orientation can be changed once the control has been created */
if (orientation != value) {
orientation = value;
int old_witdh = Width;
Width = Height;
Height = old_witdh;
Refresh ();
}
}
}
[DefaultValue (1)]
public int SmallChange {
get { return smallChange;}
set {
if ( value < 0 )
throw new Exception( string.Format("Value '{0}' must be greater than or equal to 0.", value));
if (smallChange != value) {
smallChange = value;
}
}
}
[EditorBrowsable (EditorBrowsableState.Never)]
[Bindable (false)]
[Browsable (false)]
public override string Text {
get { return base.Text; }
set {
if (value == base.Text)
return;
if (TextChanged != null)
TextChanged (this, EventArgs.Empty);
Refresh ();
}
}
[DefaultValue (1)]
public int TickFrequency {
get { return tickFrequency; }
set {
if ( value > 0 ) {
tickFrequency = value;
Refresh ();
}
}
}
[DefaultValue (TickStyle.BottomRight)]
public TickStyle TickStyle {
get { return tickStyle; }
set {
if (!Enum.IsDefined (typeof (TickStyle), value))
throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for TickStyle", value));
if (tickStyle != value) {
tickStyle = value;
Refresh ();
}
}
}
[DefaultValue (0)]
[Bindable (true)]
public int Value {
get { return position; }
set {
if (value < Minimum || value > Maximum)
throw new ArgumentException(
string.Format("'{0}' is not a valid value for 'Value'. 'Value' should be between 'Minimum' and 'Maximum'", value));
if (position != value) {
position = value;
if (ValueChanged != null)
ValueChanged (this, new EventArgs ());
Invalidate (thumb_area);
}
}
}
#endregion //Public Properties
#region Public Methods
public virtual void BeginInit ()
{
}
protected override void CreateHandle ()
{
base.CreateHandle ();
}
public virtual void EndInit ()
{
}
protected override bool IsInputKey (Keys keyData)
{
if ((keyData & Keys.Alt) == 0) {
switch (keyData & Keys.KeyCode) {
case Keys.Down:
case Keys.Right:
case Keys.Up:
case Keys.Left:
case Keys.PageUp:
case Keys.PageDown:
case Keys.Home:
case Keys.End:
return true;
}
}
return base.IsInputKey (keyData);
}
protected override void OnBackColorChanged (EventArgs e)
{
base.OnBackColorChanged (e);
}
protected override void OnHandleCreated (EventArgs e)
{
base.OnHandleCreated (e);
if (AutoSize)
if (Orientation == Orientation.Horizontal)
Size = new Size (Width, 40);
else
Size = new Size (50, Height);
UpdatePos (Value, true);
}
[EditorBrowsable (EditorBrowsableState.Advanced)]
protected override void OnMouseWheel (MouseEventArgs e)
{
base.OnMouseWheel (e);
if (!Enabled) return;
if (e.Delta > 0)
SmallDecrement ();
else
SmallIncrement ();
}
protected virtual void OnScroll (EventArgs e)
{
if (Scroll != null)
Scroll (this, e);
}
protected virtual void OnValueChanged (EventArgs e)
{
if (ValueChanged != null)
ValueChanged (this, e);
}
public void SetRange (int minValue, int maxValue)
{
Minimum = minValue;
Maximum = maxValue;
}
public override string ToString()
{
return string.Format("System.Windows.Forms.Trackbar, Minimum: {0}, Maximum: {1}, Value: {2}",
Minimum, Maximum, Value);
}
protected override void WndProc (ref Message m)
{
switch ((Msg) m.Msg) {
case Msg.WM_PAINT: {
PaintEventArgs paint_event;
paint_event = XplatUI.PaintEventStart (Handle, true);
OnPaintTB (paint_event);
XplatUI.PaintEventEnd (Handle, true);
return;
}
case Msg.WM_ERASEBKGND:
m.Result = (IntPtr) 1; /* Disable background painting to avoid flickering */
return;
default:
break;
}
base.WndProc (ref m);
}
#endregion Public Methods
#region Private Methods
private void UpdatePos (int newPos, bool update_trumbpos)
{
if (newPos < minimum){
Value = minimum;
}
else {
if (newPos > maximum) {
Value = maximum;
}
else {
Value = newPos;
}
}
}
private void LargeIncrement ()
{
UpdatePos (position + LargeChange, true);
Invalidate (thumb_area);
OnScroll (new EventArgs ());
}
private void LargeDecrement ()
{
UpdatePos (position - LargeChange, true);
Invalidate (thumb_area);
OnScroll (new EventArgs ());
}
private void SmallIncrement ()
{
UpdatePos (position + SmallChange, true);
Invalidate (thumb_area);
OnScroll (new EventArgs ());
}
private void SmallDecrement ()
{
UpdatePos (position - SmallChange, true);
Invalidate (thumb_area);
OnScroll (new EventArgs ());
}
private void OnMouseUpTB (object sender, MouseEventArgs e)
{
if (!Enabled) return;
if (thumb_pressed == true || mouse_clickmove == true) {
thumb_pressed = false;
holdclick_timer.Enabled = false;
this.Capture = false;
Invalidate (thumb_area);
}
}
private void OnMouseDownTB (object sender, MouseEventArgs e)
{
if (!Enabled) return;
bool fire_timer = false;
Point point = new Point (e.X, e.Y);
if (orientation == Orientation.Horizontal) {
if (thumb_pos.Contains (point)) {
this.Capture = true;
thumb_pressed = true;
thumb_mouseclick = e.X;
Invalidate (thumb_area);
}
else {
if (ClientRectangle.Contains (point)) {
if (e.X > thumb_pos.X + thumb_pos.Width)
LargeIncrement ();
else
LargeDecrement ();
Invalidate (thumb_area);
fire_timer = true;
mouse_clickmove = true;
}
}
}
else {
if (thumb_pos.Contains (point)) {
this.Capture = true;
thumb_pressed = true;
thumb_mouseclick = e.Y;
Invalidate (thumb_area);
}
else {
if (ClientRectangle.Contains (point)) {
if (e.Y > thumb_pos.Y + thumb_pos.Height)
LargeDecrement ();
else
LargeIncrement ();
Invalidate (thumb_area);
fire_timer = true;
mouse_clickmove = true;
}
}
}
if (fire_timer) {
holdclick_timer.Interval = 300;
holdclick_timer.Enabled = true;
}
}
private void OnMouseMoveTB (object sender, MouseEventArgs e)
{
if (!Enabled) return;
/* Moving the thumb */
if (thumb_pressed) {
if (orientation == Orientation.Horizontal){
if (ClientRectangle.Contains (e.X, thumb_pos.Y))
thumb_mouseclick = e.X;
}
else {
if (ClientRectangle.Contains (thumb_pos.X, e.Y))
thumb_mouseclick = e.Y;
}
Invalidate (thumb_area);
OnScroll (new EventArgs ());
}
}
private void OnPaintTB (PaintEventArgs pevent)
{
if (Paint != null) {
Paint (this, pevent);
}
ThemeEngine.Current.DrawTrackBar (pevent.Graphics, pevent.ClipRectangle, this);
}
private void OnKeyDownTB (object sender, KeyEventArgs e)
{
switch (e.KeyCode) {
case Keys.Down:
case Keys.Right:
SmallDecrement ();
break;
case Keys.Up:
case Keys.Left:
SmallIncrement ();
break;
case Keys.PageUp:
LargeIncrement ();
break;
case Keys.PageDown:
LargeDecrement ();
break;
case Keys.Home:
Value = Maximum;
break;
case Keys.End:
Value = Minimum;
break;
default:
break;
}
}
private void OnFirstClickTimer (Object source, ElapsedEventArgs e)
{
Point pnt;
pnt = PointToClient (MousePosition);
if (thumb_area.Contains (pnt)) {
if (orientation == Orientation.Horizontal) {
if (pnt.X > thumb_pos.X + thumb_pos.Width)
LargeIncrement ();
if (pnt.X < thumb_pos.X)
LargeDecrement ();
}
else {
if (pnt.Y > thumb_pos.Y + thumb_pos.Height)
LargeIncrement ();
if (pnt.Y < thumb_pos.Y)
LargeDecrement ();
}
Invalidate (thumb_area);
}
}
protected override void SetBoundsCore (int x, int y,int width, int height, BoundsSpecified specified)
{
base.SetBoundsCore (x, y,width, height, specified);
}
#endregion // Private Methods
}
}
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