/// <summary>
/// ��ȡ��ǰ������ڶ����о�
/// </summary>
/// <param name="hRichEditHandle">���ı��༭�����</param>
/// <returns>�����о�</returns>
public static float GetLineSpacing(IntPtr hRichEditHandle)
{
PARAFORMAT2 fmt = new PARAFORMAT2();
fmt.cbSize = Marshal.SizeOf(fmt);
fmt.dwMask = PFM_LINESPACING;
IntPtr lParam = Marshal.AllocCoTaskMem(fmt.cbSize);
Marshal.StructureToPtr(fmt, lParam, true);
NativeMethods.User32.SendMessage(hRichEditHandle, EM_GETPARAFORMAT, IntPtr.Zero, lParam);
Marshal.FreeCoTaskMem(lParam);
return fmt.dyLineSpacing / 100f;
}
/// <summary>
/// 设置行距
/// </summary>
/// <param name="ctl">控件</param>
/// <param name="dyLineSpacing">间距</param>
public static void SetLineSpace(Control ctl, int dyLineSpacing)
{
PARAFORMAT2 fmt = new PARAFORMAT2();
fmt.cbSize = Marshal.SizeOf(fmt);
fmt.bLineSpacingRule = 4;// bLineSpacingRule;
fmt.dyLineSpacing = dyLineSpacing;
fmt.dwMask = PFM_LINESPACING;
try
{
SendMessage(new HandleRef(ctl, ctl.Handle), EM_SETPARAFORMAT, 0, ref fmt);
}
catch
{
}
}
public void SetParaFormat(bool fSelection, PARAFORMAT2 format)
{
format.cbSize = PARAFORMAT2.SIZE;
SendMessage(new HandleRef(this, Handle), EM_SETPARAFORMAT, (fSelection ? 1 : 0), ref format);
}
public PARAFORMAT2 GetParaFormat(bool fSelection)
{
var format = new PARAFORMAT2();
format.cbSize = PARAFORMAT2.SIZE;
SendMessage(new HandleRef(this, Handle), EM_GETPARAFORMAT, (fSelection ? 1 : 0), ref format);
return format;
}
private static extern IntPtr SendMessage(HandleRef hWnd, int msg, int wParam, ref PARAFORMAT2 lParam);
public void NumberedBullet(bool TurnOn)
{
PARAFORMAT2 paraformat1 = new PARAFORMAT2();
paraformat1.dwMask = (int)(PFM_NUMBERING | PFM_OFFSET | PFM_NUMBERINGSTART |
PFM_NUMBERINGSTYLE | PFM_NUMBERINGTAB);
if (!TurnOn)
{
paraformat1.wNumbering = 0;
paraformat1.dxOffset = 0;
}
else
{
paraformat1.wNumbering = (short)_BulletType;
paraformat1.dxOffset = this.BulletIndent;
paraformat1.wNumberingStyle = (short)_BulletStyle;
paraformat1.wNumberingStart = _BulletNumberStart;
paraformat1.wNumberingTab = 500;
}
SendMessage(new System.Runtime.InteropServices.HandleRef(this, this.Handle), 0x447, 0, paraformat1);
}
//http://msdn.microsoft.com/en-us/library/bb787942(VS.85).aspx
/// <summary>
/// just testing, this is quite complicated
/// http://msdn2.microsoft.com/en-us/library/aa140277(office.10).aspx
/// </summary>
public void LineSpace(LineSpaceTypes types, bool bSelectAll)
{
PARAFORMAT2 paraformat1 = new PARAFORMAT2();
paraformat1.dwMask = (int)PFM_LINESPACING;
paraformat1.cbSize = (int)Marshal.SizeOf(paraformat1);//(UInt32)Marshal.SizeOf(paraformat1);
paraformat1.bLineSpacingRule = (byte)(((int)types));
//paraformat1.wReserved = 0;
switch (types)
{
case LineSpaceTypes.Single: paraformat1.dyLineSpacing = 20; break;
case LineSpaceTypes.OneAndHalf: paraformat1.dyLineSpacing = 30; break;
case LineSpaceTypes.Double: paraformat1.dyLineSpacing = 40; break;
}
// paraformat1.dyLineSpacing = ((int)types)40; // the above commented lie. This does need to be set
if (bSelectAll == true) this.SelectAll();
SendMessage(new System.Runtime.InteropServices.HandleRef(this, this.Handle), 0x447, 0, paraformat1);
this.SelectionLength = 0;
}
public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref PARAFORMAT2 lParam);
/// <summary>
/// ����ָ���ĸ��ı��༭����ǰ������ڶ����о�
/// </summary>
/// <param name="hRichEditHandle">���ı��༭�����</param>
/// <param name="lineSpacing">�����о�</param>
public static void SetLineSpacing(IntPtr hRichEditHandle, float lineSpacing)
{
PARAFORMAT2 fmt = new PARAFORMAT2();
fmt.cbSize = Marshal.SizeOf(fmt);
fmt.bLineSpacingRule = 4;
fmt.dyLineSpacing = (int)(lineSpacing * 100);
fmt.dwMask = PFM_LINESPACING;
IntPtr lParam = Marshal.AllocCoTaskMem(fmt.cbSize);
Marshal.StructureToPtr(fmt, lParam, true);
NativeMethods.User32.SendMessage(hRichEditHandle, EM_SETPARAFORMAT, IntPtr.Zero, lParam);
Marshal.FreeCoTaskMem(lParam);
}
