SplitterCtrl (flexible control with custom drawing)

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Introduction

This control is necessary for the partition of the dialog, main or child window of your program by several parts. You can appropriate to each part the window, which SplitterCtrl will manage. As a result we will get a matrix with the controls. The SplitterCtrl is derived from CWnd and is a common control based on MFC. Generally, SplitterCtrl is similar to CSplitterWnd, but it is easier to use. For example, you can create a complex matrix. For this into one or several cells it is necessary to put the same SplitterCtrl and also to divide on parts.

The control can use scaling sizes of cells with changes in its sizes. In this case the binding of a matrix to one of four angles of the parental window is possible. Also, you can use a mouse for the dynamic or static pulling of boundaries between the windows and much more.

Using the Code

The control includes four classes:

To create the control and add elements to it, do the following:

   #include "SplitterCtrl.h"

   SplitterCtrl m_Splitter;
   CListCtrl m_List1, m_List2;
      …
      …
   if(m_Splitter.Create(this,
      WS_CHILD | WS_VISIBLE,CRect(0,0,200,200),
      ID_SplitterCtrl)==false)
      return -1;   // error.

   // Create child controls.
   if(m_List1.Create(WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | LVS_REPORT,CRect(0,0,0,0),
      &m_Splitter,ID_List1)==0 ||
      m_List2.Create(WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | LVS_REPORT,CRect(0,0,0,0),
      &m_Splitter,ID_List2)==0)
      return -1;   // error.
   m_List1.InsertColumn(0,"00",LVCFMT_LEFT,100);
   m_List2.InsertColumn(0,"01",LVCFMT_LEFT,100);

   // Add child items in the m_Splitter.
   m_Splitter.AddRow();
   m_Splitter.AddColumn();
   m_Splitter.AddColumn();
   m_Splitter.SetWindow(0,0,m_List1.m_hWnd);
   m_Splitter.SetWindow(0,1,m_List2.m_hWnd);

   // Load state from registry.
   if(m_Splitter.LoadState(AfxGetApp(),"SplitterCtrl","SplitterState")==false)
   {   m_Splitter.Update();
       m_Splitter.SetEqualWidthColumns();   // error - create default state.
   }
   m_Splitter.Update();

You can manage the control as a normal matrix, dynamically insert and delete rows and columns (AddRow/AddColumn, InsertRow/InsertColumn, DeleteRow/DeleteColumn). The control makes it possible to assign the sizes (SetWidthForStatic/SetHeightForStatic, SetWidthForDynamic/SetHeightForDynamic), and also to equalize widths and heights of the cells (SetEqualWidthColumns/SetEqualHeightRows). The control is expected to call the Update function to show the results that are set by functions InsertRow, DeleteColumn, SetHeightForStatic, SetWidthsForDynamic, etc.

The control is able to save and load its state from the registry or other sources (LoadState/SaveState). This is one of the possibilities. To get the full power, look at the opened interface of the SplitterCtrlBase and SplitterCtrl classes.

Good luck :-)

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)