[Example] How to move caret to the paragraph

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Sergey Tkachenko
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Posts: 13146
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[Example] How to move caret to the paragraph

Post by Sergey Tkachenko » Sun Aug 28, 2005 10:25 am

A very simple example: how to move caret to the beginning of the n-th paragraph

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procedure GoToParagraph(rve: TCustomRichViewEdit; ParagraphIndex: Integer);
var i: Integer;
begin
  for i := 0 to rve.ItemCount-1 do begin
    if rve.IsParaStart(i) then
      dec(ParagraphIndex);
    if ParagraphIndex<0 then begin
      rve.SetSelectionBounds(i, rve.GetOffsBeforeItem(i), i, rve.GetOffsBeforeItem(i));
      rve.Invalidate;
      exit;
    end;
  end;
end;
Call:

Code: Select all

GoToParagraph(RichViewEdit1, 7);
ParagraphIndex is zero-based.

Sergey Tkachenko
Site Admin
Posts: 13146
Joined: Sat Aug 27, 2005 10:28 am
Contact:

Post by Sergey Tkachenko » Tue Apr 30, 2013 4:22 pm

Moving to the end of the current line. This function used some undocumented methods

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uses CRVFData, RVERVData;
procedure GoToEndOfLine(rve: TCustomRichViewEdit);
var DItemNo, DOffs, ItemNo, Offs: Integer;
    RVData: TRVEditRVData;
begin
  RVData := TRVEditRVData(rve.TopLevelEditor.RVData);
  DItemNo := RVData.CaretDrawItemNo+1;
  while (DItemNo<RVData.DrawItems.Count) and not RVData.DrawItems[DItemNo].FromNewLine do
    inc(DItemNo);
  dec(DItemNo);
  DOffs := RVData.GetOffsAfterDrawItem(DItemNo);
  RVData.DrawItem2Item(DItemNo, DOffs, ItemNo, Offs);
  RVData.SetSelectionBounds(ItemNo, Offs, ItemNo, Offs);
end;
Moving to the end of the current line

Code: Select all

procedure GoToEndOfPara(rve: TCustomRichViewEdit);
var ItemNo, Offs: Integer;
begin
  rve := rve.TopLevelEditor;
  ItemNo := rve.CurItemNo+1;
  while (ItemNo<rve.ItemCount) and not rve.IsParaStart(ItemNo) do
    inc(ItemNo);
  dec(ItemNo);
  Offs := rve.GetOffsAfterItem(ItemNo);
  rve.SetSelectionBounds(ItemNo, Offs, ItemNo, Offs);
end;
Moving to the end of the document

Code: Select all

procedure GoToEndOfDoc(rve: TCustomRichViewEdit);
var ItemNo, Offs: Integer;
begin
  ItemNo := rve.ItemCount-1;
  Offs := rve.GetOffsAfterItem(ItemNo);
  rve.SetSelectionBounds(ItemNo, Offs, ItemNo, Offs);
end;

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