wxGridUpdateLocker Class Reference

#include <wx/grid.h>

Detailed Description

This small class can be used to prevent wxGrid from redrawing during its lifetime by calling wxGrid::BeginBatch() in its constructor and wxGrid::EndBatch() in its destructor.

It is typically used in a function performing several operations with a grid which would otherwise result in flicker. For example:

void MyFrame::Foo()
{
    m_grid = new wxGrid(this, ...);

    wxGridUpdateLocker noUpdates(m_grid);
    m_grid-AppendColumn();
    // ... many other operations with m_grid ...
    m_grid-AppendRow();

    // destructor called, grid refreshed
}

Using this class is easier and safer than calling wxGrid::BeginBatch() and wxGrid::EndBatch() because you don't risk missing the call the latter (due to an exception for example).

Library:  wxAdvanced

Category:  Grid Related Classes

Public Member Functions
	wxGridUpdateLocker (wxGrid *grid=NULL)
	Creates an object preventing the updates of the specified grid.
	~wxGridUpdateLocker ()
	Destructor reenables updates for the grid this object is associated with.
void	Create (wxGrid *grid)
	This method can be called if the object had been constructed using the default constructor.

Constructor & Destructor Documentation

wxGridUpdateLocker::wxGridUpdateLocker

(

wxGrid *

grid = NULL

)

Creates an object preventing the updates of the specified grid.

The parameter could be NULL in which case nothing is done. If grid is non-NULL then the grid must exist for longer than this wxGridUpdateLocker object itself.

The default constructor could be followed by a call to Create() to set the grid object later.

wxGridUpdateLocker::~wxGridUpdateLocker

(

)

Destructor reenables updates for the grid this object is associated with.

Member Function Documentation

void wxGridUpdateLocker::Create

(

wxGrid *

grid

)

This method can be called if the object had been constructed using the default constructor.

It must not be called more than once.