/// <devdoc>
/// <para>
/// Toggles the visibility of the frame either by placing it in the view-linked markup
/// or by removing it from the live tree.
/// </para>
/// </devdoc>
private void ShowInternal(bool fShow)
{
// Return immediately either if no frame HTML element exists or if the visibility
// of the frame is the same as that of the requested state.
if (htmlElemFrame == null || (this.fVisible == fShow))
{
return;
}
// To show the frame, place it within the root view-linked element.
// To hide the frame, remove it completely from the view-linked tree.
try {
NativeMethods.IHTMLDOMNode domNodeFrame = (NativeMethods.IHTMLDOMNode)htmlElemFrame;
NativeMethods.IHTMLElement frameElement = (NativeMethods.IHTMLElement)domNodeFrame;
NativeMethods.IHTMLStyle frameStyle = frameElement.GetStyle();
if (fShow)
{
frameStyle.SetDisplay(String.Empty);
}
else
{
// Clear the template contents when hiding the frame. This will ensure that
// any controls within that template are removed from the designer host, etc.
if (templateElements != null)
{
for (int i = 0; i < templateElements.Length; i++)
{
if (templateElements[i] != null)
{
NativeMethods.IHTMLElement htmlElemTemplate = (NativeMethods.IHTMLElement)templateElements[i];
htmlElemTemplate.SetInnerHTML(String.Empty);
}
}
}
frameStyle.SetDisplay("none");
}
}
catch (Exception ex) {
Debug.Fail(ex.ToString());
}
this.fVisible = fShow;
}
/// <include file='doc\TemplateEditingFrame.uex' path='docs/doc[@for="TemplateEditingFrame.Initialize"]/*' />
/// <devdoc>
/// Initialize from content by creating the necessary HTML element tree structure, etc.
/// </devdoc>
private void Initialize()
{
if (this.htmlElemFrame != null)
{
return;
}
try {
NativeMethods.IHTMLDocument2 htmlDocument = (NativeMethods.IHTMLDocument2)htmlElemParent.GetDocument();
// Create an HTML element that would represent the entire template frame.
this.htmlElemFrame = htmlDocument.CreateElement("SPAN");
// Place the provided content within the frame
htmlElemFrame.SetInnerHTML(this.Content);
// Hold on to the top-level HTML element of the template frame content.
NativeMethods.IHTMLDOMNode domNodeFrame = (NativeMethods.IHTMLDOMNode)htmlElemFrame;
if (domNodeFrame != null)
{
this.htmlElemContent = (NativeMethods.IHTMLElement)domNodeFrame.GetFirstChild();
}
// Mark the frame as not editable!
NativeMethods.IHTMLElement3 htmlElement3 = (NativeMethods.IHTMLElement3)htmlElemFrame;
if (htmlElement3 != null)
{
htmlElement3.SetContentEditable("false");
}
// Create an array to hold the HTML elements representing the individual templates.
templateElements = new object[templateNames.Length];
Object varName;
Object varIndex = (int)0;
NativeMethods.IHTMLElementCollection allCollection = (NativeMethods.IHTMLElementCollection)htmlElemFrame.GetAll();
// Obtain all the children of the frame and hold on to the ones representing the templates.
for (int i = 0; i < templateNames.Length; i++)
{
try {
varName = templateNames[i];
NativeMethods.IHTMLElement htmlElemTemplate = (NativeMethods.IHTMLElement)allCollection.Item(varName, varIndex);
// Set an expando attribute (on the above HTML element) called "TemplateName"
// which contains the name of the template it corresponds to.
htmlElemTemplate.SetAttribute("templatename", varName, /*lFlags*/ 0);
// Place an editable DIV within the individual templates.
// This is needed in order for, say, TABLEs, TRs, TDs, etc., to be editable in a
// view-linked markup.
string editableDIV = "<DIV contentEditable=\"true\" style=\"padding:1;height:100%;width:100%\"></DIV>";
htmlElemTemplate.SetInnerHTML(editableDIV);
// The first child of the template element will be the above editable SPAN.
NativeMethods.IHTMLDOMNode domNodeTemplate = (NativeMethods.IHTMLDOMNode)htmlElemTemplate;
if (domNodeTemplate != null)
{
templateElements[i] = domNodeTemplate.GetFirstChild();
}
}
catch (Exception ex) {
Debug.Fail(ex.ToString());
templateElements[i] = null;
}
}
// Hold on to the HTML element within which the control name should get displayed.
// The presence of this element is optional.
varName = "idControlName";
this.htmlElemControlName = (NativeMethods.IHTMLElement)allCollection.Item(varName, varIndex);
// Retrieve the HTML element within which the template frame name should be displayed.
// The presence of this element is optional.
// We also don't hold on to it, since the name of the template frame can't be changed.
varName = "idFrameName";
object objFrameName = allCollection.Item(varName, varIndex);
if (objFrameName != null)
{
NativeMethods.IHTMLElement htmlElemFrameName = (NativeMethods.IHTMLElement)objFrameName;
htmlElemFrameName.SetInnerText(frameName);
}
NativeMethods.IHTMLDOMNode domNodeParent = (NativeMethods.IHTMLDOMNode)htmlElemParent;
if (domNodeParent == null)
{
return;
}
domNodeParent.AppendChild(domNodeFrame);
}
catch (Exception ex) {
Debug.Fail(ex.ToString());
}
}
