private void ProcessMouseMoveForSelectTextTool(int page_index, int character_index)
{
if (_mousePressed)
{
if (character_index >= 0)
{
_selectInfo = new SelectInfo()
{
StartPage = _selectInfo.StartPage,
EndPage = page_index,
EndIndex = character_index,
StartIndex = _selectInfo.StartIndex
};
_isShowSelection = true;
}
InvalidateVisual();
}
}
private void ProcessMouseDoubleClickForSelectTextTool(Point page_point, int page_index)
{
var page = Document.Pages[page_index];
int si, ei;
int ci = page.Text.GetCharIndexAtPos((float)page_point.X, (float)page_point.Y, 10.0f, 10.0f);
if (GetWord(page.Text, ci, out si, out ei))
{
_selectInfo = new SelectInfo()
{
StartPage = page_index,
EndPage = page_index,
StartIndex = si,
EndIndex = ei
};
_isShowSelection = true;
if (_selectInfo.StartPage >= 0)
GenerateSelectedTextProperty();
InvalidateVisual();
}
}
private void ProcessMouseDownForSelectTextTool(Point page_point, int page_index)
{
_selectInfo = new SelectInfo()
{
StartPage = page_index,
EndPage = page_index,
StartIndex = Document.Pages[page_index].Text.GetCharIndexAtPos((float)page_point.X, (float)page_point.Y, 10.0f, 10.0f),
EndIndex = -1// Document.Pages[page_index].Text.GetCharIndexAtPos((float)page_point.X, (float)page_point.Y, 10.0f, 10.0f)
};
_isShowSelection = false;
if (_selectInfo.StartPage >= 0)
GenerateSelectedTextProperty();
}
private SelectInfo NormalizeSelectionInfo()
{
var selTmp = _selectInfo;
if (selTmp.StartPage >= 0 && selTmp.EndPage >= 0)
{
if (selTmp.StartPage > selTmp.EndPage)
{
selTmp = new SelectInfo()
{
StartPage = selTmp.EndPage,
EndPage = selTmp.StartPage,
StartIndex = selTmp.EndIndex,
EndIndex = selTmp.StartIndex
};
}
else if ((selTmp.StartPage == selTmp.EndPage) && (selTmp.StartIndex > selTmp.EndIndex))
{
selTmp = new SelectInfo()
{
StartPage = selTmp.StartPage,
EndPage = selTmp.EndPage,
StartIndex = selTmp.EndIndex,
EndIndex = selTmp.StartIndex
};
}
}
return selTmp;
}
/// <summary>
/// Draws text selection
/// </summary>
/// <param name="drawingContext">The drawing instructions for a specific element. This context is provided to the layout system.</param>
/// <param name="selInfo">Selection info</param>
/// <param name="pageIndex">Page index to be drawn</param>
/// <remarks>
/// Full page rendering is performed in the following order:
/// <list type="bullet">
/// <item><see cref="DrawPageBackColor"/></item>
/// <item><see cref="DrawPage"/> / <see cref="DrawLoadingIcon"/></item>
/// <item><see cref="DrawFillForms"/></item>
/// <item><see cref="DrawPageBorder"/></item>
/// <item><see cref="DrawFillFormsSelection"/></item>
/// <item><see cref="DrawTextHighlight"/></item>
/// <item><see cref="DrawTextSelection"/></item>
/// <item><see cref="DrawCurrentPageHighlight"/></item>
/// <item><see cref="DrawPageSeparators"/></item>
/// </list>
/// </remarks>
protected virtual void DrawTextSelection(DrawingContext drawingContext, SelectInfo selInfo, int pageIndex)
{
if (selInfo.StartPage < 0 || !_isShowSelection)
return;
if (pageIndex >= selInfo.StartPage && pageIndex <= selInfo.EndPage)
{
int s = 0;
if (pageIndex == selInfo.StartPage)
s = selInfo.StartIndex;
int len = Document.Pages[pageIndex].Text.CountChars;
if (pageIndex == selInfo.EndPage)
len = (selInfo.EndIndex + 1) - s;
var ti = Document.Pages[pageIndex].Text.GetTextInfo(s, len);
foreach (var rc in ti.Rects)
{
var pt1 = PageToDevice(rc.left, rc.top, pageIndex);
var pt2 = PageToDevice(rc.right, rc.bottom, pageIndex);
double x = pt1.X < pt2.X ? pt1.X : pt2.X;
double y = pt1.Y < pt2.Y ? pt1.Y : pt2.Y;
double w = pt1.X > pt2.X ? pt1.X - pt2.X : pt2.X - pt1.X;
double h = pt1.Y > pt2.Y ? pt1.Y - pt2.Y : pt2.Y - pt1.Y;
Helpers.FillRectangle(drawingContext, _selectColorBrush, Helpers.CreateRect(x, y, w, h));
}
}
}
/// <summary>
/// Clear text selection
/// </summary>
public void DeselectText()
{
_selectInfo = new SelectInfo()
{
StartPage = -1,
};
InvalidateVisual();
GenerateSelectedTextProperty();
}
/// <summary>
/// Selects the text contained in specified pages.
/// </summary>
/// <param name="startPage">Zero-based index of a starting page.</param>
/// <param name="startIndex">Zero-based char index on a startPage.</param>
/// <param name="endPage">Zero-based index of a ending page.</param>
/// <param name="endIndex">Zero-based char index on a endPage.</param>
public void SelectText(int startPage, int startIndex, int endPage, int endIndex)
{
if (Document == null)
return;
if (startPage > Document.Pages.Count - 1)
startPage = Document.Pages.Count - 1;
if (startPage < 0)
startPage = 0;
if (endPage > Document.Pages.Count - 1)
endPage = Document.Pages.Count - 1;
if (endPage < 0)
endPage = 0;
int startCnt = Document.Pages[startPage].Text.CountChars;
int endCnt = Document.Pages[endPage].Text.CountChars;
if (startIndex > startCnt - 1)
startIndex = startCnt - 1;
if (startIndex < 0)
startIndex = 0;
if (endIndex > endCnt - 1)
endIndex = endCnt - 1;
if (endIndex < 0)
endIndex = 0;
_selectInfo = new SelectInfo()
{
StartPage = startPage,
StartIndex = startIndex,
EndPage = endPage,
EndIndex = endIndex
};
_isShowSelection = true;
InvalidateVisual();
GenerateSelectedTextProperty();
}
/// <summary>
/// Selects the text contained in specified pages.
/// </summary>
/// <param name="SelInfo"><see cref="SelectInfo"/> structure that describe text selection parameters.</param>
public void SelectText(SelectInfo SelInfo)
{
SelectText(SelInfo.StartPage, SelInfo.StartIndex, SelInfo.EndPage, SelInfo.EndIndex);
}
