/// <summary>
/// Draw the text.
/// </summary>
/// <param name="hdc"></param>
/// <param name="color"></param>
/// <param name="rect"></param>
/// <param name="topOffset"></param>
/// <param name="orientation"></param>
/// <param name="fontDescription"></param>
/// <param name="text"></param>
/// <param name="contentAlignment"></param>
/// <param name="flags"></param>
public static void DrawText(IntPtr hdc, Color color, Rectangle rect, int topOffset, int orientation, FontDescription fontDescription, String text,
ContentAlignment contentAlignment, int flags, bool rightToLeft)
{
NativeWindowCommon.SetBkMode(hdc, NativeWindowCommon.TRANSPARENT);
NativeWindowCommon.SetTextColor(hdc, ColorTranslator.ToWin32(color));
#if !PocketPC
// QCR #439182 & 430913: the font is used for a control before even being initialized.
// TODO: We need a better fix that avoids calling get_Font() for logical controls that are not initialized properly.
if (fontDescription == null)
{
fontDescription = new FontDescription(Control.DefaultFont);
}
#endif
NativeWindowCommon.RECT rc = new NativeWindowCommon.RECT();
rc.left = rect.Left;
rc.right = rect.Right;
rc.top = rect.Top + topOffset;
rc.bottom = rect.Bottom;
#if !PocketPC
if (orientation != 0)
{
PrintRotatedText(hdc, fontDescription, orientation, text, rect, contentAlignment, rc, rightToLeft);
}
else
#endif
{
IntPtr hFont = fontDescription.FontHandle;
NativeWindowCommon.SelectObject(hdc, hFont);
NativeWindowCommon.DrawText(hdc, text, text.Length, ref rc, flags);
}
}
/// <summary>
/// Draw the text supporting clipping according to ClipRegion.
/// </summary>
/// <param name="g"></param>
/// <param name="color"></param>
/// <param name="rect"></param>
/// <param name="topOffset"></param>
/// <param name="orientation"></param>
/// <param name="fontDescription"></param>
/// <param name="text"></param>
/// <param name="contentAlignment"></param>
/// <param name="flags"></param>
public static void ClipSupportingDrawText(Graphics g, Color color, Rectangle rect, int topOffset, int orientation, FontDescription fontDescription, String text,
ContentAlignment contentAlignment, int flags, bool rightToLeft)
{
IntPtr region = IntPtr.Zero;
IntPtr currentclippedRegion = g.Clip.GetHrgn(g);
bool IsRegionInfinite = g.Clip.IsInfinite(g);
IntPtr hdc = g.GetHdc();
NativeWindowCommon.SetBkMode(hdc, NativeWindowCommon.TRANSPARENT);
NativeWindowCommon.SetTextColor(hdc, ColorTranslator.ToWin32(color));
// Text rectangle as clip Region
IntPtr clipRegion = NativeWindowCommon.CreateRectRgn(rect.Left, rect.Top, rect.Right, rect.Bottom);
// If Text starts above control, it needs to clip
if (topOffset < 0)
{
// if current graphics is already clipped, then we need to merge with current text rectangle clip
if (!IsRegionInfinite)
{
NativeWindowCommon.CombineRgn(currentclippedRegion, currentclippedRegion, clipRegion, NativeWindowCommon.RGN_AND);
}
}
if (IsRegionInfinite)
{
// If there is no clip region on graphics, set text rectangle as clip region
region = clipRegion;
}
else if (currentclippedRegion != IntPtr.Zero)
{
// use intersected region as clip region
region = currentclippedRegion;
}
// Select resultant clipped region on DC
if (region != IntPtr.Zero)
{
NativeWindowCommon.SelectClipRgn(hdc, region);
}
if (clipRegion != IntPtr.Zero)
{
NativeWindowCommon.DeleteObject(clipRegion);
}
// Draw text
DrawText(hdc, color, rect, topOffset, orientation, fontDescription, text, contentAlignment, flags, rightToLeft);
// release objects
g.ReleaseHdc(hdc);
if (currentclippedRegion != IntPtr.Zero)
{
g.Clip.ReleaseHrgn(currentclippedRegion);
}
}
/// <summary>
/// draw header section title
/// </summary>
/// <param name="hdc"></param>
/// <param name="rc"></param>
internal void DrawTitle(IntPtr hdc, NativeWindowCommon.RECT rc, int index, bool supportsMultilineText, bool addEndEllipsesFlag, bool rightToLeftLayout)
{
Header.HeaderRenderer.GetTitleTextRect(index, ref rc);
using (Graphics gr = Graphics.FromHdc(hdc))
{
//draw sort icon
if (SortMark != HeaderSectionSortMarks.Non && !HasFilter)
{
int iconWindth = SortIconWidth();
DrawSortMark(hdc, rc, gr);
rc.right -= iconWindth + Header.SORT_ICON_LEFT_RIGHT_MARGIN;
}
if (HasFilter)
{
rc.right -= HeaderSection.FILTER_WIDTH + Header.SORT_ICON_LEFT_RIGHT_MARGIN;
}
//draw ... in the end of text if width is too short
int width = rc.right - rc.left;
int format = NativeWindowCommon.DT_EDITCONTROL | NativeWindowCommon.DT_EXTERNALLEADING;
if (supportsMultilineText)
{
format |= NativeWindowCommon.DT_WORDBREAK;
}
StringBuilder stringBuilder = new StringBuilder(Text);
if (addEndEllipsesFlag)
{
//for windows CE && orientated fonts DT_END_ELLIPSIS style is not supported
//http://support.microsoft.com/kb/249678
format |= NativeWindowCommon.DT_END_ELLIPSIS;
}
if (Environment.OSVersion.Platform == PlatformID.WinCE)
{
if (Text.IndexOf("\n") != -1)
{
SizeF size = gr.MeasureString(text, Font);
int cur, len = cur = text.Length;
while (size.Width > width && cur > 1)
{
cur = --len;
stringBuilder.Length = len;
while (cur > 1 && len - cur < 3)
{
stringBuilder[--cur] = '.';
}
size = gr.MeasureString(stringBuilder.ToString(), Font);
}
}
}
NativeWindowCommon.SetBkMode(hdc, NativeWindowCommon.TRANSPARENT);
NativeWindowCommon.SetTextColor(hdc, ColorTranslator.ToWin32(Color));
#if !PocketPC
if (FontOrientation != 0)
{
Rectangle rectangle = new Rectangle(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top);
ControlRenderer.PrintRotatedText(hdc, FontDescription, FontOrientation, stringBuilder.ToString(), rectangle, ContentAlignment, rc, rightToLeftLayout);
}
else
#endif
{
//text flags are exactly the same as DrawText DT_*** flags
format |= (int)Utils.ContentAlignment2TextFlags(ContentAlignment);
if (isSingleLine())
{
format |= NativeWindowCommon.DT_SINGLELINE;
}
IntPtr hFont = FontDescription.FontHandle;
NativeWindowCommon.SelectObject(hdc, hFont);
NativeWindowCommon.DrawText(hdc, stringBuilder.ToString(), stringBuilder.Length, ref rc, format);
}
#if !PocketPC
//Set the rectangle back
if (HasFilter)
{
rc.right += HeaderSection.FILTER_WIDTH + Header.SORT_ICON_LEFT_RIGHT_MARGIN;
DrawFilter(hdc, rc);
}
#endif
}
}
