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A WTL Grid

, 22 Jan 2002 151.7K 3.9K 52
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A WTL grid (really).

Sample Image - WtlGrid.gif

Introduction

After using WTL for some time, I've developed the control that I miss the most for the kind of project that I do : A grid.
This one is written from scratch, derived from a CScrollWindowImpl, it has the following features :

  • Grid is a vector of vector of CString.
  • It has a optional Toolbar where to add buttons with tooltip for edition operation (see screenshot).
  • Resizable column title
  • In place edit using a edit box, a combo box or a check-box.
  • Collapsible tree like behavior.
  • Overwritable behavior (BeforeEdit, AfterEdit, CellRendering, etc) via a derivable listener class.
Using it should be pretty straightforward:
#include <span class="code-string">"WtlGrid.h"
</span>

    WtlGridWrapper      grid;  
    grid.Create(*this,rcDefault,NULL,WS_CHILD|WS_VISIBLE);
    grid.construct();                 //setup
    grid.listener(new LevelListener); //add a listener to overwrite some behavior
    grid.vertical_delimiter(true);  //show vertical lines
    grid.horizontal_delimiter(true);
    grid.column_header(true); //show header
    grid.toolbar(); //show toolbar
    grid.m_toolbar.AddButton(IDB_NEW,true,"New"); //resource ID and tooltip
    grid.m_toolbar.AddButton(IDB_DELETE,false,"Delete");
    grid.m_toolbar.AddButton(IDB_UP,true,"Up");
    grid.m_toolbar.AddButton(IDB_DOWN,true,"Down");
    grid.m_toolbar.AddButton(IDB_TOP,true,"Top");
    grid.m_toolbar.AddButton(IDB_BOTTOM,true,"Bottom");
    grid.m_toolbar.enable_button(1,false);
    grid.header_height(25);
    grid.selection_mode();
    //now add the columns (header,width,alignment,Resource 
    // ID,render mode,edit mode,can grow, can be selected)
    grid.add_column("Name",-1,WtlDC::left,-1,
                    WtlGridCell::rstring,WtlGridColumn::edit,true,true);
    grid.add_column("Label",-1,WtlDC::left,-1,
                    WtlGridCell::rstring,
                    WtlGridColumn::edit,true,true);
    grid.add_column("",25,WtlDC::left,IDB_VISIBLE,
                    WtlGridCell::rcheck,
                    WtlGridColumn::check,false,
                    true,IDB_SELECTED);

   //to add rows, add a vector of cstring
  vector<CString> buf;
  buf.push_back("whatever");
  ...
  grid->add_row(buf,lev);

The inner code is also designed to be easy to understand, you'll find the following classes :

WtlGridValue

a cell value, stored as a CString.

WtlGridCell

a cell with a render mode.

WtlGridColumn

a column, with header, etc.

WtlGridColumns

a column collection, a vector of column.

WtlGridRow

a grid row, holding a vector of WtlGridCell.

WtlGridRows

a collection of rows.

WtlGrid

the control itself, containing columns and rows.

WtlGridWrapper

a wrapper control for the toolbar and the column header, this is the control that you include in your app.

Some behavior, especially the way cell are rendered and edited can be changed by overwriting a listener class, eg:

class LevelListener : public WtlGridListener 
{
 public : 
  LevelListener();

  virtual bool after_edit(WtlGrid *grid, CString &old_value, 
                          int row_nb, int column_nb,void *user,bool add);
  virtual bool after_select(WtlGrid *grid,int row_nb,int column_nb,void *user);
  virtual bool toolbar_button(WtlGrid *grid,int button_nb,void *user);
  virtual bool header_select(WtlGrid *grid,int header_nb,void *user);
  virtual bool render(WtlGrid *grid,CDCHandle dc, CRect &rc,
                      WtlGridRow *row,WtlGridCell *cell,void *user);
  virtual WtlGridColumn::e_edit_mode before_edit(WtlGrid *grid,
                                                 int row_nb, int column_nb,
                                                 void *user);
};

What is missing:

  • Obviously, the grid should be bindable to a database, and do it virtually (not loading all the records in memory), this will be my next move.
  • A lot of features...
I would be grateful to get comments and enhancement to this code, enjoy ...

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Noel Frankinet
Architect strategis
Belgium Belgium
No Biography provided

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Comments and Discussions

 
Generalbug in header Pin
RiderV30-Dec-10 6:34
memberRiderV30-Dec-10 6:34 
GeneralDisable context menu Pin
amarbabu27-Sep-06 7:30
memberamarbabu27-Sep-06 7:30 
GeneralDO NOT WRITE YOUR CODE THIS WAY!!! Pin
mloskot14-Jun-05 12:14
membermloskot14-Jun-05 12:14 
GeneralRe: DO NOT WRITE YOUR CODE THIS WAY!!! Pin
Noel Frankinet14-Jun-05 21:29
memberNoel Frankinet14-Jun-05 21:29 
GeneralRe: DO NOT WRITE YOUR CODE THIS WAY!!! Pin
mloskot15-Jun-05 12:51
membermloskot15-Jun-05 12:51 
GeneralI wanna to put together cells Pin
i4uman14-Apr-05 20:43
sussi4uman14-Apr-05 20:43 
GeneralPretty code... Pin
volmax24-Feb-04 1:57
membervolmax24-Feb-04 1:57 
General&amp;#65311;&amp;#65311;&amp;#65311; Collapsible tree like behavior. Pin
newkey6-Feb-04 20:56
membernewkey6-Feb-04 20:56 
Generalthis needs work Pin
Eugene Polonsky26-Oct-02 18:41
memberEugene Polonsky26-Oct-02 18:41 
GeneralRe: this needs work Pin
roel_v6-Mar-03 0:41
memberroel_v6-Mar-03 0:41 
GeneralRe: this needs work Pin
mloskot14-Jun-05 7:41
membermloskot14-Jun-05 7:41 
Generalhi ,test Pin
DeXian2-Jun-02 17:34
memberDeXian2-Jun-02 17:34 
GeneralRe: hi ,test Pin
kamal_upreti17-Feb-03 20:09
memberkamal_upreti17-Feb-03 20:09 
GeneralExample source Pin
Keith Holme29-May-02 2:39
memberKeith Holme29-May-02 2:39 
QuestionWM_MOUSEWHEEL ?? Pin
Donghun Lee25-Feb-02 18:40
memberDonghun Lee25-Feb-02 18:40 
QuestionAnd how do I get it to show up in a dialog? Pin
NMTop4011-Feb-02 1:23
memberNMTop4011-Feb-02 1:23 
GeneralAnd some major issues Pin
NMTop407-Feb-02 3:21
memberNMTop407-Feb-02 3:21 
GeneralRe: And some major issues Pin
Noel Frankinet7-Feb-02 3:37
memberNoel Frankinet7-Feb-02 3:37 
GeneralRe: And some major issues Pin
NMTop407-Feb-02 6:03
memberNMTop407-Feb-02 6:03 
GeneralRe: some major issues in thinking Pin
sixth_voice1-Oct-03 3:42
susssixth_voice1-Oct-03 3:42 
GeneralRe: some major issues in thinking Pin
MoonlightM27-May-04 3:52
memberMoonlightM27-May-04 3:52 
GeneralA few suggested modifications Pin
anonymous26-Feb-02 1:36
memberanonymous26-Feb-02 1:36 
GeneralRe: A few suggested modifications Pin
JusticeMonger31-Oct-03 3:38
sussJusticeMonger31-Oct-03 3:38 
GeneralRedraw problem with example Pin
Raj_Sidhu1-Feb-02 4:16
memberRaj_Sidhu1-Feb-02 4:16 
GeneralRe: Redraw problem with example Pin
NMTop4011-Feb-02 3:25
memberNMTop4011-Feb-02 3:25 
Nor does it draw properly at all when I used it in my Dialog.

The row list never gets rendered. (Ok, where is it called? I haven't got a clue how yours worked because mine never draws the rows, and when I tried it there were no borders between the values, and they were all in the wrong place, and they were neither selectable nor editable).


GeneralNeed MoveWindow Pin
Anonymous26-Oct-01 12:31
memberAnonymous26-Oct-01 12:31 
GeneralI would be grateful... Pin
Darren Schroeder8-Oct-01 14:50
memberDarren Schroeder8-Oct-01 14:50 
GeneralRe: I would be grateful... Pin
Reckless22-Oct-01 0:54
memberReckless22-Oct-01 0:54 

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