/// <summary>
/// Calculate or render the contents of our RichTextBox for printing
/// </summary>
/// <param name="rtb"></param>
/// <param name="measureOnly"></param>
/// <param name="graph"></param>
/// <param name="renderRect">输出区域，单位：pixel</param>
/// <returns>RTF是否已经完整输出</returns>
protected bool FormatRangeCore(RichTextBox rtb, bool measureOnly, Graphics graph, Rectangle renderRect)
{
int charindex = 0;
charindex = RtfPrintNativeMethods.FormatRange(rtb, measureOnly, graph,
renderRect, renderRect, 0, rtb.TextLength);
if (charindex < rtb.TextLength)
{
return(false);
}
return(true);
}
/// <summary>
/// 上标按钮事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSuper_Click(object sender, EventArgs e)
{
if (txtRTF.SelectionLength == 0)
{
return;
}
int startindex = txtRTF.SelectionStart;
int length = txtRTF.SelectionLength;
for (int i = startindex; i < startindex + length; i++)
{
txtRTF.Select(i, 1);
RtfPrintNativeMethods.SetSelectionSuperscript(txtRTF, true);
}
}