/// <summary>
/// Method used to draw the actual text data for the Control
/// </summary>
private void OnDisplayText(PaintEventArgs e)
{
if (reformatLines)
{
InitializeDisplayLines();
TotalDisplayLines = FormatLines(totalLines, 1, 0);
UpdateScrollBar(TotalDisplayLines, 0);
reformatLines = false;
}
try
{
var g = e.Graphics; //using "using" allow auto dispose
int startY;
var startX = 0;
int linesToDraw;
var buildString = new StringBuilder();
int curLine;
int curForeColor, curBackColor;
var pastForeColor = -1;
//remember what is the text color before highlighting. Hint: the code is looping from left char to right char
char[] ch;
var displayRect = new Rectangle(0, 0, Width, Height);
//Bitmap buffer = new Bitmap(this.Width, this.Height, e.Graphics);
//g.Clear(IrcColor.colors[backColor]);
if (BackgroundImage != null)
{
g.FillRectangle(new SolidBrush(TextColor.GetColor(backColor)), displayRect);
g.DrawImage(BackgroundImage, displayRect.Left, displayRect.Top, displayRect.Width, displayRect.Height);
}
else g.FillRectangle(new SolidBrush(TextColor.GetColor(backColor)), displayRect);
/*g.InterpolationMode = InterpolationMode.Low;
g.SmoothingMode = SmoothingMode.HighSpeed;
g.PixelOffsetMode = PixelOffsetMode.None;
g.CompositingQuality = CompositingQuality.HighSpeed;
g.TextRenderingHint = TextRenderingHint.SystemDefault;*/
if (totalLines == 0) return;
else
{
var val = vScrollBar.Value;
linesToDraw = Math.Min(showMaxLines, val);
//Math.Min is faster and more readable than if-else, Reference:http://stackoverflow.com/questions/5478877/math-max-vs-inline-if-what-are-the-differences
curLine = val - linesToDraw;
if (singleLine)
{
startY = 0;
linesToDraw = 1;
curLine = 0;
}
else startY = Height - LineSize * linesToDraw - LineSize / 2;
var lineCounter = 0;
var underline = false;
var isInUrl = false;
var font = new Font(Font, FontStyle.Regular);
var redline = -1;
if (ShowUnreadLine)
{
for (int i = TotalDisplayLines - 1, j = 0; i >= 0; --i)
{
if (!displayLines[i].Previous)
{
++j;
if (j == unreadMarker)
{
redline = i;
break;
}
}
}
}
while (lineCounter < linesToDraw) //iterate over all rows
{
int i = 0, j = 0;
var highlight = false;
var oldHighlight = false;
if (redline == curLine)
{
using (var p = new Pen(Color.Red))
{
g.DrawLine(p, 0, startY, Width, startY);
}
}
lineCounter++;
curForeColor = displayLines[curLine].TextColor;
var line = new StringBuilder();
line.Append(displayLines[curLine].Line);
curBackColor = backColor;
//check if in a url, cancel underline if not
if (!isInUrl)
{
underline = false;
font.SafeDispose();
font = new Font(Font, FontStyle.Regular);
}
if (line.Length > 0)
{
do //iterate over every character in a line
{
ch = line.ToString().Substring(i, 1).ToCharArray();
switch (ch[0])
{
case TextColor.EmotChar: //this header is added by SaidLine.cs & SaidLineEx.cs
//draws an emoticon
//[]001
var emotNumber = Convert.ToInt32(line.ToString().Substring(i + 1, 3));
line.Remove(0, i + 4);
i = -1;
//draw text (that wasn't yet drawn up to *this* point)
startX = DT(g, buildString, Font, startX, startY, curForeColor, curBackColor);
//draw an emoticon
g.DrawImage(TextImage.GetImage(emotNumber), startX, startY, 16, 16);
startX += 16;
buildString.Clear(); //reset the content (because we already draw it for user)
break;
case TextColor.UrlStart:
startX = DT(g, buildString, font, startX, startY, curForeColor, curBackColor);
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
line.Remove(0, 1);
i = -1;
font.SafeDispose();
font = new Font(Font, FontStyle.Underline);
isInUrl = true;
break;
case TextColor.UrlEnd:
startX = DT(g, buildString, font, startX, startY, curForeColor, curBackColor);
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
line.Remove(0, 1);
i = -1;
font.SafeDispose();
font = new Font(Font, FontStyle.Regular);
isInUrl = false;
break;
case TextColor.UnderlineChar:
startX = DT(g, buildString, font, startX, startY, curForeColor, curBackColor);
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
line.Remove(0, 1);
i = -1;
underline = !underline;
font.SafeDispose();
if (underline) font = new Font(Font, FontStyle.Underline);
else
{
font = new Font(Font, FontStyle.Regular);
}
break;
case TextColor.NewColorChar:
//draw whats previously in the string
startX = DT(g, buildString, font, startX, startY, curForeColor, curBackColor);
//is slow for slow gpu IMO
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
//get the new fore and back colors
if (!highlight)
{
curForeColor = Convert.ToInt32(line.ToString().Substring(1, 2));
curBackColor = Convert.ToInt32(line.ToString().Substring(3, 2));
//check to make sure that FC and BC are in range 0-32
if (curForeColor > TextColor.colorRange) curForeColor = displayLines[curLine].TextColor;
if (curBackColor > TextColor.colorRange) curBackColor = backColor;
}
else //if highlighting then:
{
pastForeColor = Convert.ToInt32(line.ToString().Substring(1, 2));
//remember what color this text suppose to be (will be restored to the text on the right if highlighting only happen to text on the left)
//check to make sure that FC and BC are in range 0-32
if (pastForeColor > TextColor.colorRange) pastForeColor = displayLines[curLine].TextColor;
//only happen on exceptional case (this is only for safety, no significant whatsoever)
}
//remove the color codes from the string
line.Remove(0, 5);
i = -1;
break;
default:
//curLine is "the line being processed here" (not user's line)
//startHightLine is "the line where highlight start"
//curHighLine is "the line where highlight end"
//startHighChar is "the char where highlight start"
//curHighChar is "the char where highlight end"
//j is "the char being processed here"
if (startHighLine >= 0 && //highlight is active
((curLine >= startHighLine && curLine <= curHighLine) ||
//processing in between highlight (if highlight is upward)
(curLine <= startHighLine && curLine >= curHighLine)))
//processing in between highlight (if highlight is downward)
{
if ((curLine > startHighLine && curLine < curHighLine) ||
(curLine == startHighLine && j >= startHighChar &&
(curLine <= curHighLine && j < curHighChar || curLine < curHighLine)) ||
(curLine == curHighLine && j < curHighChar &&
(curLine >= startHighLine && j >= startHighChar || curLine > startHighLine)))
{
highlight = true;
}
else if ((curLine < startHighLine && curLine > curHighLine) ||
(curLine == startHighLine && j < startHighChar &&
(curLine >= curHighLine && j >= curHighChar || curLine > curHighLine)) ||
(curLine == curHighLine && j >= curHighChar &&
(curLine <= startHighLine && j < startHighChar || curLine < startHighLine)))
{
highlight = true;
}
else highlight = false;
}
else highlight = false;
++j;
if (highlight != oldHighlight)
//at highlight border (where left & right is highlight or not highlight)
{
oldHighlight = highlight;
//draw text (that wasn't yet drawn up to *this* point)
startX = DT(g, buildString, font, startX, startY, curForeColor, curBackColor);
buildString.Clear(); //reset the content (because we already draw it for user)
//remove whats drawn from string
line.Remove(0, i);
i = 0;
if (highlight)
{
pastForeColor = curForeColor; //remember previous text color
curForeColor = TextColor.background; //white (defined in TextColor.cs)
curBackColor = TextColor.text; //black (defined in TextColor.cs)
}
else
{
curForeColor = pastForeColor; //restore intended text color
curBackColor = backColor;
}
}
buildString.Append(ch[0]);
break;
}
i++;
} while (line.Length > 0 && i != line.Length); //loop character
}
//draw anything that is left over
if (i == line.Length && line.Length > 0) DT(g, buildString, font, startX, startY, curForeColor, curBackColor);
startY += LineSize;
startX = 0;
curLine++;
buildString.Clear();
} //loop line
font.Dispose();
//e.Graphics.DrawImageUnscaled(buffer, 0, 0);
}
// var coords = displayRect
ButtonRenderer.DrawButton(g,
new Rectangle(displayRect.Right - 200, displayRect.Top - 50, 100, 30),
"Hide",
Font,
false,
PushButtonState.Normal);
buildString = null;
}
catch (Exception ee)
{
Trace.WriteLine("TextWindow OnDisplayText Error:" + ee.Message, ee.StackTrace);
}
}
/// <summary>
/// Method used to draw the actual text data for the Control
/// </summary>
void OnDisplayText(PaintEventArgs e)
{
if (reformatLines)
{
InitializeDisplayLines();
TotalDisplayLines = FormatLines(totalLines, 1, 0);
UpdateScrollBar(TotalDisplayLines,0);
reformatLines = false;
}
try
{
using (var buffer = new Bitmap(Width, Height, PixelFormat.Format32bppPArgb))
using (var sf = StringFormat.GenericTypographic)
using (var g = Graphics.FromImage(buffer)) //using "using" allow auto dispose
{
sf.FormatFlags |= StringFormatFlags.MeasureTrailingSpaces;
int startY;
float startX = 0;
int linesToDraw;
var buildString = new StringBuilder();
int textSize;
int curLine;
int curForeColor, curBackColor;
int pastForeColor=-1; //remember what is the text color before highlighting. Hint: the code is looping from left char to right char
char[] ch;
var displayRect = new Rectangle(0, 0, Width, Height);
//Bitmap buffer = new Bitmap(this.Width, this.Height, e.Graphics);
//g.Clear(IrcColor.colors[backColor]);
if (BackgroundImage != null)
{
g.FillRectangle(new SolidBrush(TextColor.GetColor(backColor)), displayRect);
g.DrawImage(BackgroundImage, displayRect.Left, displayRect.Top, displayRect.Width, displayRect.Height);
}
else g.FillRectangle(new SolidBrush(TextColor.GetColor(backColor)), displayRect);
g.InterpolationMode = InterpolationMode.Low;
g.SmoothingMode = SmoothingMode.HighSpeed;
g.PixelOffsetMode = PixelOffsetMode.None;
g.CompositingQuality = CompositingQuality.HighSpeed;
g.TextRenderingHint = TextRenderingHint.SystemDefault;
if (totalLines == 0) e.Graphics.DrawImageUnscaled(buffer, 0, 0);
else
{
var val = vScrollBar.Value;
linesToDraw = Math.Min(showMaxLines, val); //Math.Min is faster and more readable than if-else, Reference:http://stackoverflow.com/questions/5478877/math-max-vs-inline-if-what-are-the-differences
curLine = val - linesToDraw;
if (singleLine)
{
startY = 0;
linesToDraw = 1;
curLine = 0;
}
else startY = Height - (LineSize*linesToDraw) - (LineSize/2);
var lineCounter = 0;
var underline = false;
var isInUrl = false;
var font = new Font(Font.Name, Font.Size, Font.Style);
var redline = -1;
if (ShowUnreadLine)
{
for (int i = TotalDisplayLines - 1, j = 0; i >= 0; --i)
{
if (!displayLines[i].Previous)
{
++j;
if (j == unreadMarker)
{
redline = i;
break;
}
}
}
}
while (lineCounter < linesToDraw) //iterate over all rows
{
int i = 0, j = 0;
var highlight = false;
var oldHighlight = false;
if (redline == curLine)
{
using (var p = new Pen(Color.Red)) {
g.DrawLine(p, 0, startY, Width, startY);
}
}
lineCounter++;
curForeColor = displayLines[curLine].TextColor;
var line = new StringBuilder();
line.Append(displayLines[curLine].Line);
curBackColor = backColor;
//check if in a url, cancel underline if not
if (!isInUrl)
{
underline = false;
font.SafeDispose();
font = new Font(Font.Name, Font.Size, Font.Style);
}
if (line.Length > 0)
{
do //iterate over every character in a line
{
using (SolidBrush backColorBrush = new SolidBrush(TextColor.GetColor(curBackColor))) //refresh backcolor
{
ch = line.ToString().Substring(i, 1).ToCharArray();
switch (ch[0])
{
case TextColor.EmotChar: //this header is added by SaidLine.cs & SaidLineEx.cs
//draws an emoticon
//[]001
var emotNumber = Convert.ToInt32(line.ToString().Substring(i + 1, 3));
line.Remove(0, 3);
if (!isInUrl)
{
//select the emoticon here
var bm = TextImage.GetImage(emotNumber);
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), Font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r); //draw white (or black) rectangle
}
g.DrawImage(bm, //draw an emoticon
startX + g.MeasureString(buildString.ToString(), Font, 0, sf).Width,
startY,
16,
16);
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(), //draw text (that wasn't yet drawn up to *this* point)
Font,
brush,
startX,
startY,
sf);
}
startX += bm.Width + g.MeasureString(buildString.ToString(), Font, 0, sf).Width;
buildString.Clear(); //reset the content (because we already draw it for user)
}
break;
case TextColor.UrlStart:
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), Font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r);
}
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(),
font,
brush,
startX,
startY,
sf);
}
// TextRenderer.DrawText(g, buildString.ToString(), font, new Point((int)startX, startY), TextColor.GetColor(curForeColor), TextColor.GetColor(curBackColor)); //is slow for slow gpu IMO
startX += g.MeasureString(buildString.ToString(), font, 0, sf).Width; //textSizes[32]
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
line.Remove(0, 1);
i = -1;
font.SafeDispose();
font = new Font(Font.Name, Font.Size, Font.Style | FontStyle.Underline);
isInUrl = true;
break;
case TextColor.UrlEnd:
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r);
}
// TextRenderer.DrawText(g, buildString.ToString(), font, new Point((int)startX, startY), TextColor.GetColor(curForeColor), TextColor.GetColor(curBackColor)); //is slow for slow gpu IMO
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(),
font,
brush,
startX,
startY,
sf);
}
startX += g.MeasureString(buildString.ToString(), font, 0, sf).Width; //textSizes[32]
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
line.Remove(0, 1);
i = -1;
font.SafeDispose();
font = new Font(Font.Name, Font.Size, Font.Style);
isInUrl = false;
break;
case TextColor.UnderlineChar:
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r);
}
// TextRenderer.DrawText(g, buildString.ToString(), font, new Point((int)startX, startY), TextColor.GetColor(curForeColor), TextColor.GetColor(curBackColor)); //is slow for slow gpu IMO
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(),
font,
brush,
startX,
startY,
sf);
}
startX += g.MeasureString(buildString.ToString(), font, 0, sf).Width; //textSizes[32]
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
line.Remove(0, 1);
i = -1;
underline = !underline;
font.SafeDispose();
if (underline) font = new Font(Font.Name, Font.Size, Font.Style | FontStyle.Underline);
else {font = new Font(Font.Name, Font.Size, Font.Style);}
break;
case TextColor.NewColorChar:
//draw whats previously in the string
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r);
}
// TextRenderer.DrawText(g, buildString.ToString(), font, new Point((int)startX, startY), TextColor.GetColor(curForeColor), TextColor.GetColor(curBackColor)); //is slow for slow gpu IMO
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(),
font,
brush,
startX,
startY,
sf);
}
startX += g.MeasureString(buildString.ToString(), font, 0, sf).Width; //textSizes[32]
buildString.Clear();
//remove whats drawn from string
line.Remove(0, i);
//get the new fore and back colors
if (!highlight)
{
curForeColor = Convert.ToInt32(line.ToString().Substring(1, 2));
curBackColor = Convert.ToInt32(line.ToString().Substring(3, 2));
//check to make sure that FC and BC are in range 0-32
if (curForeColor > TextColor.colorRange) curForeColor = displayLines[curLine].TextColor;
if (curBackColor > TextColor.colorRange) curBackColor = backColor;
}
else //if highlighting then:
{
pastForeColor = Convert.ToInt32(line.ToString().Substring(1, 2)); //remember what color this text suppose to be (will be restored to the text on the right if highlighting only happen to text on the left)
//check to make sure that FC and BC are in range 0-32
if (pastForeColor > TextColor.colorRange) pastForeColor = displayLines[curLine].TextColor; //only happen on exceptional case (this is only for safety, no significant whatsoever)
}
//remove the color codes from the string
line.Remove(0, 5);
i = -1;
break;
default:
//random symbol safety check (symbols to skip drawing)
if((int)ch[0] > Int16.MaxValue) //random symbol can mess up graphic object "g" in Linux! which cause nothing to be drawn after the symbol
{
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), Font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r);
}
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(),
font,
brush,
startX,
startY,
sf);
}
startX += g.MeasureString(buildString.ToString(), font, 0, sf).Width;
float symbolWidth;
using (var tmpBuffer = new Bitmap(LineSize,LineSize, PixelFormat.Format32bppPArgb))
using (var tmpG = Graphics.FromImage(tmpBuffer)) //temporary graphic object that can be messed up independently
{
var randomChar = ch[0].ToString();
symbolWidth = tmpG.MeasureString(randomChar, font, 0, sf).Width;
if (symbolWidth > 0) //don't draw when symbol width == 0 (symptom obtained from trial-n-error)
{
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor)))
{
g.DrawString(randomChar,
font,
brush,
startX,
startY,
sf);
}
}
}
startX += symbolWidth;
line.Remove(0, i);
line.Remove(0, 1);
i= -1;
buildString.Clear();
break;
}
//curLine is "the line being processed here" (not user's line)
//startHightLine is "the line where highlight start"
//curHighLine is "the line where highlight end"
//startHighChar is "the char where highlight start"
//curHighChar is "the char where highlight end"
//j is "the char being processed here"
if (startHighLine >= 0 && //highlight is active
((curLine >= startHighLine && curLine <= curHighLine) || //processing in between highlight (if highlight is upward)
(curLine <= startHighLine && curLine >= curHighLine))) //processing in between highlight (if highlight is downward)
{
if ((curLine > startHighLine && curLine < curHighLine) ||
(curLine == startHighLine && j >= startHighChar && (curLine <= curHighLine && j < curHighChar || curLine < curHighLine)) ||
(curLine == curHighLine && j < curHighChar && (curLine >= startHighLine && j >= startHighChar || curLine > startHighLine)))
{
highlight = true;
}
else if ((curLine < startHighLine && curLine > curHighLine) ||
(curLine == startHighLine && j < startHighChar && (curLine >= curHighLine && j >= curHighChar || curLine > curHighLine)) ||
(curLine == curHighLine && j >= curHighChar && (curLine <= startHighLine && j < startHighChar || curLine < startHighLine)))
{
highlight = true;
}
else highlight = false;
}
else highlight = false;
++j;
if (highlight != oldHighlight) //at highlight border (where left & right is highlight or not highlight)
{
oldHighlight = highlight;
//draw whats previously in the string
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
g.FillRectangle(backColorBrush, r); //draw black (or white) rectangle
}
/* //GDI example:
TextRenderer.DrawText(g,
buildString.ToString(),
font,
new Point((int)startX, startY),
TextColor.GetColor(curForeColor),
TextColor.GetColor(curBackColor));
*/
using (var solidBrush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(), //draw text (that wasn't yet drawn up to *this* point)
font,
solidBrush,
startX,
startY,
sf);
}
startX += g.MeasureString(buildString.ToString(), font, 0, sf).Width; //textSizes[32]
buildString.Clear();//reset the content (because we already draw it for user)
//remove whats drawn from string
line.Remove(0, i);
i = 0;
if (highlight)
{
pastForeColor = curForeColor; //remember previous text color
curForeColor = TextColor.background; //white (defined in TextColor.cs)
curBackColor = TextColor.text; //black (defined in TextColor.cs)
}
else
{
curForeColor = pastForeColor; //restore intended text color
curBackColor = backColor;
}
}
buildString.Append(ch[0]);
break;
}
i++;
}
} while (line.Length > 0 && i != line.Length); //loop character
}
//draw anything that is left over
if (i == line.Length && line.Length > 0)
{
if (curBackColor != backColor)
{
textSize = (int)g.MeasureString(buildString.ToString(), font, 0, sf).Width + 1;
var r = new Rectangle((int)startX, startY, textSize + 1, LineSize + 1);
using (var brush = new SolidBrush(TextColor.GetColor(curBackColor))) g.FillRectangle(brush, r);
}
// TextRenderer.DrawText(g, buildString.ToString(), font, new Point((int)startX, startY), TextColor.GetColor(curForeColor), TextColor.GetColor(curBackColor));
using (var brush = new SolidBrush(TextColor.GetColor(curForeColor))) {
g.DrawString(buildString.ToString(), font, brush, startX, startY, sf);
}
}
startY += LineSize;
startX = 0;
curLine++;
buildString.Clear();
} //loop line
font.Dispose();
e.Graphics.DrawImageUnscaled(buffer, 0, 0);
}
// var coords = displayRect
ButtonRenderer.DrawButton(g,
new Rectangle(displayRect.Right - 200, displayRect.Top - 50, 100, 30),
"Hide",
Font,
false,
PushButtonState.Normal);
buildString = null;
}
}
catch (Exception ee)
{
Trace.WriteLine("TextWindow OnDisplayText Error:" + ee.Message, ee.StackTrace);
}
}
