void OnLayoutEditor(object sender, TextEditorLayoutEventArgs args)
{
Rectangle r = this.GetTextBounds(this.selectedNode);
r.Offset(this.scrollPosition);
args.PreferredBounds = r;
args.MaxBounds = r;
}
public void PerformLayout()
{
if (this.LayoutEditor != null)
{
TextEditorLayoutEventArgs args = new TextEditorLayoutEventArgs(this._currentEditor.Text);
LayoutEditor(this, args);
SetEditorBounds(args);
}
}
void AdjustBounds(string text, Graphics g, TextEditorLayoutEventArgs args)
{
Rectangle r = args.PreferredBounds;
if (AutoSize)
{
if (string.IsNullOrEmpty(text))
{
text = "W"; // double the size if it was empty to begin with.
}
text += "W"; // leave room to grow by one more char
}
if (text.EndsWith("\n"))
{
text += "."; // cause MeasureString to include space for newlines.
}
SizeF size = SizeF.Empty;
int maxHeight = (this._parent.Height * 2) / 3;
try
{
if (text.Length >= 10000)
{
// MeasureString gets too slow after a certain size.
text = text.Substring(0, 10000);
}
size = g.MeasureString(text, this._parent.Font, this._parent.Width, StringFormat.GenericDefault);
}
catch (Exception)
{
// string might be too long to measure!
size = new SizeF(r.Width, maxHeight);
}
int h = (int)Math.Max(r.Height, Math.Ceiling(size.Height));
if (h > r.Height)
{
// when multiline, add padding so that it aligns correctly.
h += this._parent.Font.Height / 2;
}
r.Height = Math.Min(maxHeight, h); // no more than 2/3rd of the window.
if (AutoSize)
{
r.Width = Math.Max(r.Width, (int)size.Width + 2);
}
if (r.Right > args.MaxBounds.Right)
{
r.Width = args.MaxBounds.Right - r.Left;
}
args.PreferredBounds = r;
}
void SetEditorBounds(TextEditorLayoutEventArgs args)
{
string text = this._currentEditor.Text;
Graphics g = this._parent.CreateGraphics();
using (g)
{
AdjustBounds(text, g, args);
}
Rectangle r = args.PreferredBounds;
if (r.Bottom > this._parent.Height)
{
// todo: scroll the view so we don't have to pop-up backwards, but this is tricky because
// we may need to scroll more than the XmlTreeView scrollbar maximum in the case where the
// last node has a lot of text...
r.Offset(new Point(0, this._parent.Height - r.Bottom));
}
int maxHeight = (this._parent.Height * 2) / 3;
if (r.Height < maxHeight)
{
int h = this._currentEditor.PreferredSize.Height;
if (r.Height < h)
{
r.Y -= (h - r.Height) / 2;
if (r.Y < 0)
{
r.Y = 0;
}
r.Height = h;
}
}
Rectangle or = this._currentEditor.Bounds;
if (or.Left != r.Left || or.Right != r.Right || or.Top != r.Top || or.Bottom != r.Bottom)
{
this._currentEditor.Bounds = r;
}
}
void OnLayoutEditor(object sender, TextEditorLayoutEventArgs args)
{
Rectangle r = this.GetTextBounds(this.selectedNode);
r.Offset(this.scrollPosition);
args.PreferredBounds = r;
args.MaxBounds = r;
}
void SetEditorBounds(TextEditorLayoutEventArgs args)
{
string text = this.currentEditor.Text;
Graphics g = this.parent.CreateGraphics();
using (g) {
AdjustBounds(text, g, args);
}
Rectangle r = args.PreferredBounds;
if (r.Bottom > this.parent.Height) {
// todo: scroll the view so we don't have to pop-up backwards, but this is tricky because
// we may need to scroll more than the XmlTreeView scrollbar maximum in the case where the
// last node has a lot of text...
r.Offset(new Point(0, this.parent.Height - r.Bottom));
}
int maxHeight = (this.parent.Height * 2) / 3;
if (r.Height < maxHeight) {
int h = this.currentEditor.PreferredSize.Height;
if (r.Height < h) {
r.Y -= (h - r.Height) / 2;
if (r.Y < 0) r.Y = 0;
r.Height = h;
}
}
Rectangle or = this.currentEditor.Bounds;
if (or.Left != r.Left || or.Right != r.Right || or.Top != r.Top || or.Bottom != r.Bottom) {
this.currentEditor.Bounds = r;
}
}
void AdjustBounds(string text, Graphics g, TextEditorLayoutEventArgs args)
{
Rectangle r = args.PreferredBounds;
if (AutoSize) {
if (string.IsNullOrEmpty(text))
text = "W"; // double the size if it was empty to begin with.
text += "W"; // leave room to grow by one more char
}
if (text.EndsWith("\n")) text += "."; // cause MeasureString to include space for newlines.
SizeF size = SizeF.Empty;
int maxHeight = (this.parent.Height * 2) / 3;
try {
if (text.Length >= 10000) {
// MeasureString gets too slow after a certain size.
text = text.Substring(0, 10000);
}
size = g.MeasureString(text, this.parent.Font, this.parent.Width, StringFormat.GenericDefault);
} catch (Exception) {
// string might be too long to measure!
size = new SizeF(r.Width, maxHeight);
}
int h = (int)Math.Max(r.Height, Math.Ceiling(size.Height));
if (h > r.Height ) {
// when multiline, add padding so that it aligns correctly.
h += this.parent.Font.Height / 2;
}
r.Height = Math.Min(maxHeight, h); // no more than 2/3rd of the window.
if (AutoSize) {
r.Width = Math.Max(r.Width, (int)size.Width + 2);
}
if (r.Right > args.MaxBounds.Right)
r.Width = args.MaxBounds.Right - r.Left;
args.PreferredBounds = r;
}
public void PerformLayout()
{
if (this.LayoutEditor != null) {
TextEditorLayoutEventArgs args = new TextEditorLayoutEventArgs(this.currentEditor.Text);
LayoutEditor(this, args);
SetEditorBounds(args);
}
}