/// <internalonly/>
/// <devdoc>
/// <para>Notifies the server control that caused the postback that
/// it should handle an incoming post back event.
/// Implements IPostBackEventHandler.</para>
/// </devdoc>
protected virtual void RaisePostBackEvent(string eventArgument)
{
ValidateEvent(UniqueID, eventArgument);
string postBackValue = null;
if (eventArgument != null && _hotSpots != null)
{
int hotSpotIndex = Int32.Parse(eventArgument, CultureInfo.InvariantCulture);
if (hotSpotIndex >= 0 && hotSpotIndex < _hotSpots.Count)
{
HotSpot hotSpot = _hotSpots[hotSpotIndex];
HotSpotMode mode = hotSpot.HotSpotMode;
if (mode == HotSpotMode.NotSet)
{
mode = HotSpotMode;
}
if (mode == HotSpotMode.PostBack)
{
postBackValue = hotSpot.PostBackValue;
}
}
}
// Ignore invalid indexes silently(VSWhidbey 185738)
if (postBackValue != null)
{
OnClick(new ImageMapEventArgs(postBackValue));
}
}
private void MainCanvas_MouseDown(object sender, MouseButtonEventArgs e)
{
if (_hotSpotMode == HotSpotMode.Start)
{
_hotSpotStartPoint = e.GetPosition(MainCanvas);
_hotSpotMode = HotSpotMode.End;
_tempRectangle = new System.Windows.Shapes.Rectangle();
_tempRectangle.Stroke = Brushes.Red;
MainCanvas.Children.Add(_tempRectangle);
return;
}
if (_hotSpotMode == HotSpotMode.End)
{
Point point = e.GetPosition(MainCanvas);
int x = Convert.ToInt32(Math.Truncate(Math.Min(_hotSpotStartPoint.X, point.X)));
int y = Convert.ToInt32(Math.Truncate(Math.Min(_hotSpotStartPoint.Y, point.Y)));
int width = Convert.ToInt32(Math.Truncate(Math.Abs(_hotSpotStartPoint.X - point.X)));
int height = Convert.ToInt32(Math.Truncate(Math.Abs(_hotSpotStartPoint.Y - point.Y)));
HotSpot hotSpot = new HotSpot(new Rect(x, y, width, height));
MainCanvas.Children.Remove(_tempRectangle);
_tempRectangle = null;
AddHotSpot(hotSpot);
_hotSpotMode = HotSpotMode.None;
return;
}
}
protected internal override void Render(HtmlTextWriter writer)
{
base.Render(writer);
if (spots != null && spots.Count > 0)
{
bool enabled = Enabled;
writer.AddAttribute(HtmlTextWriterAttribute.Id, "ImageMap" + ClientID);
writer.AddAttribute(HtmlTextWriterAttribute.Name, "ImageMap" + ClientID);
writer.RenderBeginTag(HtmlTextWriterTag.Map);
for (int n = 0; n < spots.Count; n++)
{
HotSpot spot = spots [n];
writer.AddAttribute(HtmlTextWriterAttribute.Shape, spot.MarkupName);
writer.AddAttribute(HtmlTextWriterAttribute.Coords, spot.GetCoordinates());
writer.AddAttribute(HtmlTextWriterAttribute.Title, spot.AlternateText);
writer.AddAttribute(HtmlTextWriterAttribute.Alt, spot.AlternateText);
if (spot.AccessKey.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Accesskey, spot.AccessKey);
}
if (spot.TabIndex != 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Tabindex, spot.TabIndex.ToString());
}
HotSpotMode mode = spot.HotSpotMode != HotSpotMode.NotSet ? spot.HotSpotMode : HotSpotMode;
switch (mode)
{
case HotSpotMode.Inactive:
writer.AddAttribute("nohref", "true", false);
break;
case HotSpotMode.Navigate:
string target = spot.Target.Length > 0 ? spot.Target : Target;
if (!String.IsNullOrEmpty(target))
{
writer.AddAttribute(HtmlTextWriterAttribute.Target, target);
}
if (enabled)
{
string navUrl = ResolveClientUrl(spot.NavigateUrl);
writer.AddAttribute(HtmlTextWriterAttribute.Href, navUrl);
}
break;
case HotSpotMode.PostBack:
writer.AddAttribute(HtmlTextWriterAttribute.Href, Page.ClientScript.GetPostBackClientHyperlink(this, n.ToString(), true));
break;
}
writer.RenderBeginTag(HtmlTextWriterTag.Area);
writer.RenderEndTag();
}
writer.RenderEndTag();
}
}
protected internal override void Render(HtmlTextWriter writer)
{
if (Control.HotSpots.Count > 0)
{
HotSpotMode mapMode = Control.HotSpotMode;
if (mapMode == HotSpotMode.NotSet)
{
mapMode = HotSpotMode.Navigate;
}
HotSpotMode spotMode;
int hotSpotIndex = 0;
string targetURL;
string text;
foreach (HotSpot item in Control.HotSpots)
{
text = item.AlternateText;
if (text != null && text.Length == 0)
{
text = item.NavigateUrl;
}
spotMode = item.HotSpotMode;
if (spotMode == HotSpotMode.NotSet)
{
spotMode = mapMode;
}
if (spotMode == HotSpotMode.PostBack)
{
PageAdapter.RenderPostBackEvent(writer, Control.ClientID, hotSpotIndex.ToString(CultureInfo.InvariantCulture),
null, text);
}
else if (spotMode == HotSpotMode.Navigate)
{
targetURL = Control.ResolveClientUrl(item.NavigateUrl);
targetURL = Control.GetCountClickUrl(targetURL);
PageAdapter.RenderBeginHyperlink(writer, targetURL, true /* encode */, null, Control.AccessKey);
writer.Write(text);
PageAdapter.RenderEndHyperlink(writer);
}
else //HotSpotMode.Inactive
{
writer.Write(LiteralControlAdapterUtility.ProcessWmlLiteralText(text));
}
++hotSpotIndex;
writer.WriteBreak();
}
}
}
private void AddButton_Click(object sender, RoutedEventArgs e)
{
_hotSpotMode = HotSpotMode.Start;
}
/// <internalonly/>
/// <devdoc>
/// <para>Sends server control content to a provided HtmlTextWriter, which writes the content
/// to be rendered to the client.
/// Overrides Control.Render.</para>
/// </devdoc>
protected internal override void Render(HtmlTextWriter writer)
{
if (Enabled && !IsEnabled && SupportsDisabledAttribute)
{
// We need to do the cascade effect on the server, because the browser
// only renders as disabled, but doesn't disable the functionality.
writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");
}
_hasHotSpots = ((_hotSpots != null) && (_hotSpots.Count > 0));
base.Render(writer);
if (_hasHotSpots)
{
string fullClientID = "ImageMap" + ClientID;
writer.AddAttribute(HtmlTextWriterAttribute.Name, fullClientID);
writer.AddAttribute(HtmlTextWriterAttribute.Id, fullClientID);
writer.RenderBeginTag(HtmlTextWriterTag.Map);
HotSpotMode mapMode = HotSpotMode;
if (mapMode == HotSpotMode.NotSet)
{
mapMode = HotSpotMode.Navigate;
}
HotSpotMode spotMode;
int hotSpotIndex = 0;
string controlTarget = Target;
foreach (HotSpot item in _hotSpots)
{
writer.AddAttribute(HtmlTextWriterAttribute.Shape, item.MarkupName, false);
writer.AddAttribute(HtmlTextWriterAttribute.Coords, item.GetCoordinates());
spotMode = item.HotSpotMode;
if (spotMode == HotSpotMode.NotSet)
{
spotMode = mapMode;
}
if (spotMode == HotSpotMode.PostBack)
{
// Make sure the page has a server side form if we are posting back
if (Page != null)
{
Page.VerifyRenderingInServerForm(this);
}
if ((RenderingCompatibility < VersionUtil.Framework40) || IsEnabled)
{
string eventArgument = hotSpotIndex.ToString(CultureInfo.InvariantCulture);
writer.AddAttribute(HtmlTextWriterAttribute.Href,
Page.ClientScript.GetPostBackClientHyperlink(this, eventArgument, true));
}
}
else if (spotMode == HotSpotMode.Navigate)
{
if ((RenderingCompatibility < VersionUtil.Framework40) || IsEnabled)
{
String resolvedUrl = ResolveClientUrl(item.NavigateUrl);
writer.AddAttribute(HtmlTextWriterAttribute.Href, resolvedUrl);
}
// Use HotSpot target first, if not specified, use ImageMap's target
string target = item.Target;
if (target.Length == 0)
{
target = controlTarget;
}
if (target.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Target, target);
}
}
else if (spotMode == HotSpotMode.Inactive)
{
writer.AddAttribute("nohref", "true");
}
writer.AddAttribute(HtmlTextWriterAttribute.Title, item.AlternateText);
writer.AddAttribute(HtmlTextWriterAttribute.Alt, item.AlternateText);
string s = item.AccessKey;
if (s.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Accesskey, s);
}
int n = item.TabIndex;
if (n != 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Tabindex, n.ToString(NumberFormatInfo.InvariantInfo));
}
writer.RenderBeginTag(HtmlTextWriterTag.Area);
writer.RenderEndTag();
++hotSpotIndex;
}
writer.RenderEndTag(); // Map
}
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (_hotSpotMode == HotSpotMode.Start)
{
_hotSpotStartPoint = new Point(e.X, e.Y);
_hotSpotMode = HotSpotMode.End;
return;
}
if (_hotSpotMode == HotSpotMode.End)
{
int x = Math.Min(_hotSpotStartPoint.X, e.X);
int y = Math.Min(_hotSpotStartPoint.Y, e.Y);
int width = Math.Abs(_hotSpotStartPoint.X - e.X);
int height = Math.Abs(_hotSpotStartPoint.Y - e.Y);
HotSpot hotSpot = new HotSpot(new Rectangle(x, y, width, height));
_hotSpots.Add(hotSpot);
listView1.Items.Add(hotSpot.ToString());
_hotSpotMode = HotSpotMode.None;
return;
}
}
private void button3_Click(object sender, EventArgs e)
{
_hotSpotMode = HotSpotMode.Start;
}
