private static int getFirstRowIndex(FontSettings settings, int offset)
{
if (offset < PADDING_TOP + settings.BlockHeight)
{
return 0;
}
int rows = (offset - PADDING_TOP) / (settings.BlockHeight + BLOCK_MARGIN);
return rows;
}
/// <summary>
/// Get scroll largeChange value, for reset vScrollbar when font parameters changed
/// </summary>
/// <param name="settings"></param>
/// <returns></returns>
public static int getScrollLargeChange(FontSettings settings, int height)
{
int largeScrollHeight = ROWS_OF_LARGE_SCROLL * (settings.BlockHeight + BLOCK_MARGIN);
int workHeight = height - PADDING_BOTTOM - PADDING_TOP;
if (largeScrollHeight > workHeight)
{
largeScrollHeight = workHeight;
}
return largeScrollHeight / SCROLL_STEP;
}
/// <summary>
/// Get scroll maximum value, used for reset vScrollbar when font parameters changed
/// </summary>
/// <param name="height">picturebox client height</param>
/// <param name="settings"></param>
/// <returns></returns>
public static int getScrollMaximum(int height, FontSettings settings)
{
int rowHeight = settings.BlockHeight + BLOCK_MARGIN;
int rows = settings.Chars.Length / 16;
if (settings.Chars.Length % 16 > 0) rows++;
int blockTotalHeight = rows * rowHeight;
int workHeight = height - PADDING_TOP - PADDING_BOTTOM;
// pad to full page
blockTotalHeight += (blockTotalHeight % workHeight);
int steps = (blockTotalHeight + SCROLL_STEP) / SCROLL_STEP;
return steps > 0 ? steps : 1;
}
/// <summary>
/// Get char's index by position of content image
/// </summary>
/// <remarks>
/// if outrange return -1
/// </remarks>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="scrollOffset"></param>
/// <param name="settings"></param>
/// <returns>chars string index</returns>
public static int getCurrentCharIndex(int x, int y, int scrollOffset, FontSettings settings)
{
// convert to font draw region's location
x -= PADDING_LEFT;
y = y - PADDING_TOP + scrollOffset * SCROLL_STEP;
// outrange return -1
if (x < 0 || y < 0) return -1;
// calculate row index
int rows = y / (settings.BlockHeight + BLOCK_MARGIN);
// calculate column index
int cols = x / (settings.BlockWidth + BLOCK_MARGIN);
// outrange of columns return -1
if (cols >= 16) return -1;
// get index of chars string
int pos = rows * 16 + cols;
// if greate than chars length return -1
pos = pos >= settings.Chars.Length ? -1 : pos;
return pos;
}
/// <summary>
/// Draw content view's image
/// </summary>
/// <param name="g">Graphics of Content picturebox</param>
/// <param name="height">picturebox's client height</param>
/// <param name="settings"></param>
/// <param name="scrollOffset">vScrollbar's value</param>
public static void DrawContentImage(Graphics g, int height, FontSettings settings, int scrollOffset)
{
int charIndex = getCurrentCharIndex(PADDING_LEFT, PADDING_TOP, scrollOffset, settings);
if (charIndex == -1) return;
scrollOffset *= SCROLL_STEP;
int workHeight = height - PADDING_TOP - PADDING_BOTTOM;
int rowHeight = settings.BlockHeight + BLOCK_MARGIN;
int columnWidth = settings.BlockWidth + BLOCK_MARGIN;
int rows = workHeight / rowHeight + 1;
int rowOffset = scrollOffset % rowHeight;
if (rowOffset > 0) rows++;
g.Clear(Properties.Settings.Default.ContentBackColor);
using (Bitmap bmp = new Bitmap(settings.BlockWidth, settings.BlockHeight))
{
using (Graphics frame = Graphics.FromImage(bmp))
{
int x = PADDING_LEFT, y = PADDING_TOP;
Rectangle rectCopy = new Rectangle(0, rowOffset, bmp.Width, bmp.Height - rowOffset);
Rectangle rectIndex = new Rectangle(0, rowOffset > 0 ? y - rowOffset : y, PADDING_LEFT, bmp.Height);
int charCount = settings.Chars.Length;
//for (int row = 0; row < rows; row++)
while(y < height - PADDING_BOTTOM)
{
// out of range, break
if (charIndex >= charCount) break;
// display row index
TextRenderer.DrawText(g,
((charIndex / 16).ToString("X4")),
Properties.Settings.Default.RowIndexFont, rectIndex,
Properties.Settings.Default.RowIndexColor, Properties.Settings.Default.ContentBackColor,
TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
for (int column = 0; column < 16; column++)
{
if (charIndex >= charCount) break;
DrawChar(frame, settings, settings.Chars[charIndex++]);
g.DrawImage(bmp, x, y, rectCopy, GraphicsUnit.Pixel);
x += columnWidth;
}
// after clip first row, reset copy rectangle
if (PADDING_TOP == y)
{
rectCopy.Y = 0;
rectCopy.Height = bmp.Height;
}
x = PADDING_LEFT;
y += (PADDING_TOP == y ? (rowHeight - rowOffset) : rowHeight);
rectIndex.Y += rowHeight;
// clip last row
if (y + rowHeight> height - PADDING_BOTTOM)
{
rectCopy.Height = height - PADDING_BOTTOM - y;
}
}
// clear row index
Brush b = new SolidBrush(Color.Red);//Properties.Settings.Default.ContentBackColor);
g.FillRectangle(b, 0, 0, PADDING_LEFT, PADDING_TOP);
g.FillRectangle(b, 0, height - PADDING_BOTTOM, PADDING_LEFT, PADDING_BOTTOM);
}
}
}
/// <summary>
/// Draw a char in given graphics
/// </summary>
/// <param name="g"></param>
/// <param name="settings"></param>
/// <param name="c"></param>
public static void DrawChar(Graphics g, FontSettings settings, char c)
{
g.TextRenderingHint = settings.RenderingHint;
g.Clear(settings.BackColor);
TextRenderer.DrawText(g, c.ToString(), settings.Font,
new Rectangle(settings.OffsetX, settings.OffsetY, settings.BlockWidth, settings.BlockHeight),
settings.Forecolor, settings.BackColor, settings.TextFormatFlags);
}
/// <summary>
/// return a bitmap which drawed a char
/// </summary>
/// <param name="settings"></param>
/// <param name="charPos"></param>
/// <returns></returns>
public static Bitmap DrawChar(FontSettings settings, int charPos)
{
Bitmap bmp = new Bitmap(settings.BlockWidth, settings.BlockHeight);
using (Graphics g = Graphics.FromImage(bmp))
{
DrawChar(g, settings, settings.Chars[charPos]);
}
return bmp;
}
/// <summary>
/// Get user choice and save to fontSettings
/// </summary>
/// <returns>if validation failured return false</returns>
private bool getSettings()
{
if (fontSettings != null)
{
fontSettings.Dispose();
vScrollBar1.Value = 0;
}
try
{
fontSettings = new FontSettings();
fontSettings.SetForeColor(textBoxForecolor.Text);
fontSettings.SetBackColor(textBoxBackgroundColor.Text);
FontStyle fntStyle = radioButton1.Checked ? FontStyle.Regular :
radioButton2.Checked ? FontStyle.Italic :
radioButton3.Checked ? FontStyle.Bold : FontStyle.Bold | FontStyle.Italic;
fontSettings.SetFont(listBoxSystemFont.SelectedItem, fntStyle, listBoxSize.SelectedItem);
fontSettings.RenderingHint = radioButton5.Checked ? System.Drawing.Text.TextRenderingHint.SingleBitPerPixel :
radioButton6.Checked ? System.Drawing.Text.TextRenderingHint.AntiAliasGridFit :
radioButton7.Checked ? System.Drawing.Text.TextRenderingHint.ClearTypeGridFit :
System.Drawing.Text.TextRenderingHint.SystemDefault;
fontSettings.TextFormatFlags = ButtonAlignChecked == button1 ? TextFormatFlags.Left | TextFormatFlags.Top :
ButtonAlignChecked == button2 ? TextFormatFlags.HorizontalCenter | TextFormatFlags.Top :
ButtonAlignChecked == button3 ? TextFormatFlags.Right | TextFormatFlags.Top :
ButtonAlignChecked == button4 ? TextFormatFlags.Left | TextFormatFlags.VerticalCenter :
ButtonAlignChecked == button6 ? TextFormatFlags.Right | TextFormatFlags.VerticalCenter :
ButtonAlignChecked == button7 ? TextFormatFlags.Left | TextFormatFlags.Bottom :
ButtonAlignChecked == button8 ? TextFormatFlags.HorizontalCenter | TextFormatFlags.Bottom :
ButtonAlignChecked == button9 ? TextFormatFlags.Right | TextFormatFlags.Bottom :
TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter;
fontSettings.SetBlockSize(numericUpDownBlockWidth.Value, numericUpDownBlockHeight.Value);
fontSettings.SetOffset(numericUpDownOffsetX.Value, numericUpDownOffsetY.Value);
fontSettings.Chars = richTextBoxCharInput.Text;
fontSettings.processChars(checkBoxIgnoreNewLine.Checked, checkBoxInsertNewLine.Checked,
checkBoxSortChars.Checked, checkBoxFilterChars.Checked);
// clear zoom image
if (pictureBoxZoom.Image != null)
{
pictureBoxZoom.Image.Dispose();
pictureBoxZoom.Image = null;
pictureBoxZoom.Refresh();
labelCurrent.Text = "";
}
}
catch (Exception ex)
{
Misc.MsgErr(ex.Message);
return false;
}
return true;
}