/// <summary>
/// Creates a new Graphics object from the device context handle associated with the Graphics
/// parameter
/// </summary>
/// <param name="oldGraphics">Graphics instance to obtain the parameter from</param>
/// <returns>A new GDI+ drawing surface</returns>
public static System.Drawing.Graphics CreateGraphics(System.Drawing.Graphics oldGraphics)
{
System.Drawing.Graphics createdGraphics;
System.IntPtr hdc = oldGraphics.GetHdc();
createdGraphics = System.Drawing.Graphics.FromHdc(hdc);
oldGraphics.ReleaseHdc(hdc);
return createdGraphics;
}
public static ABC GetCharWidthABC(char ch, Font font, System.Drawing.Graphics gr)
{
ABC[] _temp = new ABC[1];
IntPtr hDC = gr.GetHdc();
Font ft = (Font)font.Clone();
IntPtr hFt = ft.ToHfont();
SelectObject(hDC, hFt);
GetCharABCWidthsW(hDC, ch, ch, _temp);
DeleteObject(hFt);
gr.ReleaseHdc();
return _temp[0];
}
/// <summary>
/// Draws the part defined by the current renderer onto a specified <see cref="Graphics"/> surface, within the
/// given clipping bounds.
/// </summary>
/// <param name="graphics">The <see cref="Graphics"/> surface on which the part is drawn.</param>
/// <param name="state">A constant which determines the current state of the part.</param>
/// <param name="bounds">The bounding rectangle in which the part is drawn.</param>
/// <param name="clipBounds">The bounding rectangle in which the part is clipped.</param>
public void Draw(System.Drawing.Graphics graphics, int state, Rectangle bounds, Rectangle clipBounds)
{
if (Supported)
{
IntPtr hdc = IntPtr.Zero;
try
{
DrawCore(hdc = graphics.GetHdc(), state, bounds, clipBounds);
}
finally
{
if (hdc != IntPtr.Zero)
graphics.ReleaseHdc(hdc);
}
}
}
private void DrawBorder(System.Drawing.Graphics g)
{
IntPtr hTheme = UxTheme.OpenThemeData(this.Handle, "EDIT");
// Makes sure Windows XP is running and
// a .manifest file exists for the EXE.
if (Environment.OSVersion.Version.Major >= 5
&& Environment.OSVersion.Version.Minor > 0
&& System.IO.File.Exists(Application.ExecutablePath + ".manifest")
&& (hTheme != IntPtr.Zero))
{
//Get DC
IntPtr hDC = g.GetHdc();
int state = (int) UxTheme.ETS_NORMAL;
switch (this.m_state)
{
case State.Disabled :
state = (int) UxTheme.ETS_DISABLED;
break;
default:
break;
}
try
{
RECT r = new RECT(this.ClientRectangle.Left, this.ClientRectangle.Right, this.ClientRectangle.Top, this.ClientRectangle.Bottom);
//Render button
IntPtr hr = UxTheme.DrawThemeBackground( hTheme, hDC, UxTheme.EP_EDITTEXT, state, r, null);
}
finally
{
//Release DC
g.ReleaseHdc(hDC);
UxTheme.CloseThemeData(hTheme);
}
}
else
{
using (Graphics y = this.CreateGraphics())
{
ControlPaint.DrawBorder(y, ClientRectangle, SystemColors.Control, ButtonBorderStyle.Inset);
}
}
}
// Queries APC spacing for the specified character.
static float? GetCharacterWidth(char character, Font font, System.Drawing.Graphics graphics)
{
// Look up the native device context and font handles.
IntPtr hdc = graphics.GetHdc();
try
{
IntPtr hFont = font.ToHfont();
try
{
// Select our font into the DC.
IntPtr oldFont = NativeMethods.SelectObject(hdc, hFont);
try
{
// Query the character spacing.
var result = new NativeMethods.ABCFloat[1];
if (NativeMethods.GetCharABCWidthsFloatW(hdc, character, character, result))
{
return result[0].A +
result[0].B +
result[0].C;
}
else
{
return null;
}
}
finally
{
NativeMethods.SelectObject(hdc, oldFont);
}
}
finally
{
NativeMethods.DeleteObject(hFont);
}
}
finally
{
graphics.ReleaseHdc(hdc);
}
}
public static void DrawText(System.Drawing.Graphics graphics, string text, System.Drawing.Font font, System.Drawing.Color foreColor, System.Drawing.Color backColor, System.Drawing.Rectangle bounds, Skybound.Windows.Forms.TextFormatFlags formatFlags)
{
if ((text == null) || (text.Length == 0) || (graphics == null) || (font == null) || bounds.Size == System.Drawing.Size.Empty || foreColor.Equals(System.Drawing.Color.Empty) || foreColor.Equals(System.Drawing.Color.Transparent))
return;
System.IntPtr intPtr1 = graphics.GetHdc();
try
{
System.IntPtr intPtr2 = Skybound.Windows.Forms.TextRenderer.GetCachedFont(font);
System.IntPtr intPtr3 = Skybound.Windows.Forms.TextRenderer.SelectObject(intPtr1, intPtr2);
if (backColor.Equals(System.Drawing.Color.Empty) || backColor.Equals(System.Drawing.Color.Transparent))
{
Skybound.Windows.Forms.TextRenderer.SetBkMode(intPtr1, 1);
}
else
{
Skybound.Windows.Forms.TextRenderer.SetBkMode(intPtr1, 2);
Skybound.Windows.Forms.TextRenderer.SetBkColor(intPtr1, System.Drawing.ColorTranslator.ToWin32(backColor));
}
int i = Skybound.Windows.Forms.TextRenderer.GetTextColor(intPtr1);
Skybound.Windows.Forms.TextRenderer.SetTextColor(intPtr1, System.Drawing.ColorTranslator.ToWin32(foreColor));
Skybound.Windows.Forms.TextRenderer.RECT rect = new Skybound.Windows.Forms.TextRenderer.RECT(bounds);
Skybound.Windows.Forms.TextRenderer.DrawText(intPtr1, text, text.Length, ref rect, (int)formatFlags);
Skybound.Windows.Forms.TextRenderer.SetTextColor(intPtr1, i);
Skybound.Windows.Forms.TextRenderer.SelectObject(intPtr1, intPtr3);
}
finally
{
graphics.ReleaseHdc(intPtr1);
}
}
public static bool GetStringPath(
System.Drawing.Graphics pGraphics,
System.Drawing.Drawing2D.GraphicsPath ppPath,
string pszText,
LOGFONT plf,
System.Drawing.Rectangle rtDraw)
{
IntPtr hDC = pGraphics.GetHdc();
int nPrevMode = SetBkMode(hDC, TRANSPARENT);
// create and select it
IntPtr hFont = CreateFontIndirect(plf);
if (null == hFont)
return false;
IntPtr hOldFont = (IntPtr)SelectObject(hDC, hFont);
RECT rect = new RECT(rtDraw);
// use a path to record how the text was drawn
const uint DT_CENTER = 0x00000001;
BeginPath(hDC);
DrawText(hDC, pszText, pszText.Length, ref rect, DT_CENTER);
EndPath(hDC);
// Find out how many points are in the path. Note that
// for long strings or complex fonts, this number might be
// gigantic!
int nNumPts = GetPath(hDC, null, null, 0);
if (nNumPts == 0)
return false;
// Allocate memory to hold points and stroke types from
// the path.
POINT[] lpPoints = new POINT[nNumPts];
byte[] lpTypes = new byte[nNumPts];
// Now that we have the memory, really get the path data.
nNumPts = GetPath(hDC, lpPoints, lpTypes, nNumPts);
// If it worked, draw the lines. Win95 and Win98 don't support
// the PolyDraw API, so we use our own member function to do
// similar work. If you're targeting only Windows NT, you can
// use the PolyDraw() API and avoid the COutlineView::PolyDraw()
// member function.
if (nNumPts != -1)
PolyDraw(ppPath, lpPoints, lpTypes, nNumPts);
// Put back the old font
SelectObject(hDC, hOldFont);
DeleteObject(hFont);
SetBkMode(hDC, nPrevMode);
pGraphics.ReleaseHdc(hDC);
return true;
}
