Items in richview documents

RichView In document  ITEM

     One 、ITEM object

1、TCustomRVItemInfo yes TRichView Basic types of all items in the document .

2、 except TCustomRVItemInfo Outside , Many types can form ITEM：

     3、 form ITEM The inheritance relationship between objects

     

 

Two 、ITEM Is the basic element of a document

1、Item It is the basic drawing unit in the document

2、Item Divided into text Item And non text Item

3、Item In document ,0 to ItemCount-1 In sequence , And because of ITEN Of ParaSytle value （ identical ）, Component segment fall .

Be careful ： Component segment fall Conditions ：

 4、 The following objects can form a single ITEM

·Text Text

·Tabulators Tab stop

·Pictures picture

·Hot-Pictures Pictures with hyperlinks

·Break Pagination （ The horizontal line that fills the whole line ）

·Controls Delphi/C++Builder Control

·Bullets Bullet

·Hotspots Bullets with hyperlinks

·Tables form

·List Markers Paragraph bullet or number

·Labels Text like controls that cannot wrap lines

·Numbered Sequences Numbering sequence

·Endnotes Endnote

·Footnotes footnote

·Custom Item Customize Item

     5、Tag

      Every Item All related One Tag value , In the old version, it is Integer Type of , The new version is String type .

    Tag Its function is to facilitate the search of the index .

      3、 ... and 、 In document ITEM

    1、 The document is created by ITEM form . The following figure is a one page document , share 8 individual ITEM：

        The first line number 1 Is a centered text ITEM.

        The first line number 2 to 4 By three ITEM Form a segment .2 and 4 It's the text , Insert a... In the middle ITEMG.

        Lines 3 to 5 , Number 5-7, It's all one ITEM, Form a paragraph .

        Sixth elements , It's an empty string （ Line break ）, Form a ITEM.

        In the above document , Yes 8 individual ITEM, Yes 6 Paragraphs .

       2、 obtain ITEM Of Count

property ItemCount: Integer;

Actual operation ：

for i := RichViewEdit1.ItemCount - 1 downto 0 do

Be careful ：

（1） In document , Be sure to distinguish ITEM, Understanding of paragraphs , It can be regarded as the same ParaStylesr ITEM queue .

（2）ITEN In the text , Can not have CR and LF（#13 and #10） character （ Carriage return and line change ）

TAB（#09）tab Key character 、 #0 character （ Null character ）、 FF（#12） Page feed character . These characters , Can be set up separately One ITEM.

       Four 、 Join in ITEM The main method

AddNL         Add a text item ;

AddBreak       Added disconnection ( Level );

AddBullet       add to bullet( The picture is from ImageList);

AddHotspot     Add hotspots ( The picture is from ImageList - Hypertext links );

AddPicture      Add images ;

AddHotPicture   Add pictures - Hypertext links ;

AddControl      add to Delphi/ c++ Builder Control ;

AddTab         Add a tabulator ;

AddItem        General method for appending entries ( Usually used for tables );

AddCheckpoint   Add a checkpoint associated with the next added item .

      5、 ... and 、 modify ITEM

      1、 Get text

procedure SetItemTextEd(ItemNo: Integer; const s: String);
procedure SetItemTextEdA(ItemNo: Integer; const s: TRVAnsiString);
procedure SetItemTextEdW(ItemNo: Integer; const s: TRVUnicodeString);

     2、 Set text

procedure SetItemTextEd(ItemNo: Integer; const s: String);
procedure SetItemTextEdA(ItemNo: Integer; const s: TRVAnsiString);
procedure SetItemTextEdW(ItemNo: Integer; const s: TRVUnicodeString);

Parameters ：

      ItemNo    Item The serial number of

      S             Text character   

      6、 ... and 、 Delete ITEM

procedure DeleteItems(FirstItemNo, Count: Integer);

   Parameters ：

FirstItemNo    from 0 To ItemCount-1, Delete the first ITEM.

Count           Delete several consecutive ITEM.

        7、 ... and 、 Insert ITEM

procedure SetItemTextEd(ItemNo: Integer; const s: String);
procedure SetItemTextEdA(ItemNo: Integer; const s: TRVAnsiString);
procedure SetItemTextEdW(ItemNo: Integer; const s: TRVUnicodeString);

      8、 ... and 、 Other applications

     A little .