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// 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) 2004-2005 Novell, Inc.
//
// Authors:
// Jackson Harper (jackson@ximian.com)
//
// COMPLETE
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.IO;
using System.Net;
namespace System.Windows.Forms {
[DefaultProperty("Image")]
[Designer("System.Windows.Forms.Design.PictureBoxDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
[Docking (DockingBehavior.Ask)]
[ClassInterface (ClassInterfaceType.AutoDispatch)]
[ComVisible (true)]
[DefaultBindingProperty ("Image")]
public class PictureBox : Control, ISupportInitialize
{
#region Fields
private Image image;
private PictureBoxSizeMode size_mode;
private Image error_image;
private string image_location;
private Image initial_image;
private bool wait_on_load;
private WebClient image_download;
private bool image_from_url;
private int no_update;
#endregion // Fields
private EventHandler frame_handler;
#region Public Constructor
public PictureBox ()
{
//recalc = true;
no_update = 0;
SetStyle (ControlStyles.OptimizedDoubleBuffer, true);
SetStyle (ControlStyles.Opaque, false);
SetStyle (ControlStyles.Selectable, false);
SetStyle (ControlStyles.SupportsTransparentBackColor, true);
HandleCreated += new EventHandler(PictureBox_HandleCreated);
initial_image = ResourceImageLoader.Get ("image-x-generic.png");
error_image = ResourceImageLoader.Get ("image-missing.png");
}
#endregion // Public Constructor
#region Public Properties
[DefaultValue(PictureBoxSizeMode.Normal)]
[Localizable(true)]
[RefreshProperties(RefreshProperties.Repaint)]
public PictureBoxSizeMode SizeMode {
get { return size_mode; }
set {
if (size_mode == value)
return;
size_mode = value;
if (size_mode == PictureBoxSizeMode.AutoSize) {
AutoSize = true;
SetAutoSizeMode (AutoSizeMode.GrowAndShrink);
} else {
AutoSize = false;
SetAutoSizeMode (AutoSizeMode.GrowOnly);
}
UpdateSize ();
if (no_update == 0) {
Invalidate ();
}
OnSizeModeChanged (EventArgs.Empty);
}
}
[Bindable (true)]
[Localizable(true)]
public Image Image {
get { return image; }
set { ChangeImage (value, false); }
}
[DefaultValue(BorderStyle.None)]
[DispId(-504)]
public BorderStyle BorderStyle {
get { return InternalBorderStyle; }
set { InternalBorderStyle = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new bool CausesValidation {
get { return base.CausesValidation; }
set { base.CausesValidation = value; }
}
[Localizable (true)]
[RefreshProperties (RefreshProperties.All)]
public Image ErrorImage {
get { return error_image; }
set { error_image = value; }
}
[RefreshProperties (RefreshProperties.All)]
[Localizable(true)]
public Image InitialImage {
get { return initial_image; }
set { initial_image = value; }
}
[Localizable (true)]
[DefaultValue (null)]
[RefreshProperties (RefreshProperties.All)]
public string ImageLocation {
get { return image_location; }
set {
image_location = value;
if (!string.IsNullOrEmpty (value)) {
if (WaitOnLoad)
Load (value);
else
LoadAsync (value);
} else if (image_from_url)
ChangeImage (null, true);
}
}
[Localizable (true)]
[DefaultValue (false)]
public bool WaitOnLoad {
get { return wait_on_load; }
set { wait_on_load = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new ImeMode ImeMode {
get { return base.ImeMode; }
set { base.ImeMode = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override RightToLeft RightToLeft {
get { return base.RightToLeft; }
set { base.RightToLeft = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new int TabIndex {
get { return base.TabIndex; }
set { base.TabIndex = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new bool TabStop {
get { return base.TabStop; }
set { base.TabStop = value; }
}
[Bindable(false)]
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override string Text {
get { return base.Text; }
set { base.Text = value; }
}
protected override CreateParams CreateParams {
get {
return base.CreateParams;
}
}
protected override ImeMode DefaultImeMode {
get { return base.DefaultImeMode; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override Font Font {
get { return base.Font; }
set { base.Font = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override Color ForeColor {
get { return base.ForeColor; }
set { base.ForeColor = value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override bool AllowDrop {
get { return base.AllowDrop; }
set { base.AllowDrop = value; }
}
#endregion // Public Properties
#region Protected Instance Methods
protected override Size DefaultSize {
get { return ThemeEngine.Current.PictureBoxDefaultSize; }
}
protected override void Dispose (bool disposing)
{
if (image != null) {
StopAnimation ();
image = null;
}
initial_image = null;
base.Dispose (disposing);
}
protected override void OnPaint (PaintEventArgs pe)
{
ThemeEngine.Current.DrawPictureBox (pe.Graphics, pe.ClipRectangle, this);
base.OnPaint (pe);
}
protected override void OnVisibleChanged (EventArgs e)
{
base.OnVisibleChanged (e);
}
protected virtual void OnSizeModeChanged (EventArgs e)
{
EventHandler eh = (EventHandler)(Events [SizeModeChangedEvent]);
if (eh != null)
eh (this, e);
}
protected override void OnEnabledChanged (EventArgs e)
{
base.OnEnabledChanged (e);
}
[EditorBrowsable (EditorBrowsableState.Advanced)]
protected override void OnHandleCreated (EventArgs e)
{
base.OnHandleCreated (e);
}
[EditorBrowsable (EditorBrowsableState.Advanced)]
protected override void OnHandleDestroyed (EventArgs e)
{
base.OnHandleDestroyed (e);
}
protected virtual void OnLoadCompleted (AsyncCompletedEventArgs e)
{
AsyncCompletedEventHandler eh = (AsyncCompletedEventHandler)(Events[LoadCompletedEvent]);
if (eh != null)
eh (this, e);
}
protected virtual void OnLoadProgressChanged (ProgressChangedEventArgs e)
{
ProgressChangedEventHandler eh = (ProgressChangedEventHandler)(Events[LoadProgressChangedEvent]);
if (eh != null)
eh (this, e);
}
protected override void OnParentChanged (EventArgs e)
{
base.OnParentChanged (e);
}
protected override void OnResize (EventArgs e)
{
base.OnResize (e);
Invalidate ();
}
internal override Size GetPreferredSizeCore (Size proposedSize)
{
if (image == null)
return base.GetPreferredSizeCore (proposedSize);
else
return image.Size;
}
#endregion // Protected Instance Methods
#region ISupportInitialize Interface
void System.ComponentModel.ISupportInitialize.BeginInit() {
no_update++;
}
void System.ComponentModel.ISupportInitialize.EndInit() {
if (no_update > 0) {
no_update--;
}
if (no_update == 0) {
Invalidate ();
}
}
#endregion // ISupportInitialize Interface
#region Private Properties
private WebClient ImageDownload {
get {
if (image_download == null)
image_download = new WebClient ();
return image_download;
}
}
#endregion
#region Private Methods
private void ChangeImage (Image value, bool from_url)
{
StopAnimation ();
image_from_url = from_url;
image = value;
if (IsHandleCreated) {
UpdateSize ();
if (image != null && ImageAnimator.CanAnimate (image)) {
frame_handler = new EventHandler (OnAnimateImage);
ImageAnimator.Animate (image, frame_handler);
}
if (no_update == 0) {
Invalidate ();
}
}
}
private void StopAnimation ()
{
if (frame_handler == null)
return;
ImageAnimator.StopAnimate (image, frame_handler);
frame_handler = null;
}
private void UpdateSize ()
{
if (image == null)
return;
if (Parent != null)
Parent.PerformLayout (this, "AutoSize");
}
private void OnAnimateImage (object sender, EventArgs e)
{
// This is called from a worker thread,BeginInvoke is used
// so the control is updated from the correct thread
// Check if we have a handle again, since it may have gotten
// destroyed since the last time we checked.
if (!IsHandleCreated)
return;
BeginInvoke (new EventHandler (UpdateAnimatedImage), new object [] { this, e });
}
private void UpdateAnimatedImage (object sender, EventArgs e)
{
// Check if we have a handle again, since it may have gotten
// destroyed since the last time we checked.
if (!IsHandleCreated)
return;
ImageAnimator.UpdateFrames (image);
Refresh ();
}
private void PictureBox_HandleCreated(object sender, EventArgs e) {
UpdateSize ();
if (image != null && ImageAnimator.CanAnimate (image)) {
frame_handler = new EventHandler (OnAnimateImage);
ImageAnimator.Animate (image, frame_handler);
}
if (no_update == 0) {
Invalidate ();
}
}
void ImageDownload_DownloadDataCompleted (object sender, DownloadDataCompletedEventArgs e)
{
if (e.Error != null && !e.Cancelled)
Image = error_image;
else if (e.Error == null && !e.Cancelled)
using (MemoryStream ms = new MemoryStream (e.Result))
Image = Image.FromStream (ms);
ImageDownload.DownloadProgressChanged -= new DownloadProgressChangedEventHandler (ImageDownload_DownloadProgressChanged);
ImageDownload.DownloadDataCompleted -= new DownloadDataCompletedEventHandler (ImageDownload_DownloadDataCompleted);
image_download = null;
OnLoadCompleted (e);
}
private void ImageDownload_DownloadProgressChanged (object sender, DownloadProgressChangedEventArgs e)
{
OnLoadProgressChanged (new ProgressChangedEventArgs (e.ProgressPercentage, e.UserState));
}
#endregion // Private Methods
#region Public Instance Methods
public void CancelAsync ()
{
if (image_download != null)
image_download.CancelAsync ();
}
public void Load ()
{
Load (image_location);
}
public void Load (string url)
{
if (string.IsNullOrEmpty (url))
throw new InvalidOperationException ("ImageLocation not specified.");
image_location = url;
if (url.Contains ("://"))
using (Stream s = ImageDownload.OpenRead (url))
ChangeImage (Image.FromStream (s), true);
else
ChangeImage (Image.FromFile (url), true);
}
public void LoadAsync ()
{
LoadAsync (image_location);
}
public void LoadAsync (string url)
{
// If WaitOnLoad is true, do not do async
if (wait_on_load) {
Load (url);
return;
}
if (string.IsNullOrEmpty (url))
throw new InvalidOperationException ("ImageLocation not specified.");
image_location = url;
ChangeImage (InitialImage, true);
if (ImageDownload.IsBusy)
ImageDownload.CancelAsync ();
Uri uri = null;
try {
uri = new Uri (url);
} catch (UriFormatException) {
uri = new Uri (Path.GetFullPath (url));
}
ImageDownload.DownloadProgressChanged += new DownloadProgressChangedEventHandler (ImageDownload_DownloadProgressChanged);
ImageDownload.DownloadDataCompleted += new DownloadDataCompletedEventHandler (ImageDownload_DownloadDataCompleted);
ImageDownload.DownloadDataAsync (uri);
}
public override string ToString() {
return String.Format("{0}, SizeMode: {1}", base.ToString (), SizeMode);
}
#endregion
#region Events
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler CausesValidationChanged {
add { base.CausesValidationChanged += value; }
remove { base.CausesValidationChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler Enter {
add { base.Enter += value; }
remove { base.Enter -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler FontChanged {
add { base.FontChanged += value; }
remove { base.FontChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler ForeColorChanged {
add { base.ForeColorChanged += value; }
remove { base.ForeColorChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler ImeModeChanged {
add { base.ImeModeChanged += value; }
remove { base.ImeModeChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event KeyEventHandler KeyDown {
add { base.KeyDown += value; }
remove { base.KeyDown -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event KeyPressEventHandler KeyPress {
add { base.KeyPress += value; }
remove { base.KeyPress -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event KeyEventHandler KeyUp {
add { base.KeyUp += value; }
remove { base.KeyUp -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler Leave {
add { base.Leave += value; }
remove { base.Leave -= value; }
}
static object LoadCompletedEvent = new object ();
static object LoadProgressChangedEvent = new object ();
public event AsyncCompletedEventHandler LoadCompleted {
add { Events.AddHandler (LoadCompletedEvent, value); }
remove { Events.RemoveHandler (LoadCompletedEvent, value); }
}
public event ProgressChangedEventHandler LoadProgressChanged {
add { Events.AddHandler (LoadProgressChangedEvent, value); }
remove { Events.RemoveHandler (LoadProgressChangedEvent, value); }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler RightToLeftChanged {
add { base.RightToLeftChanged += value; }
remove { base.RightToLeftChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler TabIndexChanged {
add { base.TabIndexChanged += value; }
remove { base.TabIndexChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler TabStopChanged {
add { base.TabStopChanged += value; }
remove { base.TabStopChanged -= value; }
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public new event EventHandler TextChanged {
add { base.TextChanged += value; }
remove { base.TextChanged -= value; }
}
static object SizeModeChangedEvent = new object ();
public event EventHandler SizeModeChanged {
add { Events.AddHandler (SizeModeChangedEvent, value); }
remove { Events.RemoveHandler (SizeModeChangedEvent, value); }
}
#endregion // Events
}
}
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