Q3GridView Class Reference

Member Function Documentation

Q3GridView::Q3GridView ( QWidget * parent = 0, const char * name = 0, Qt::WindowFlags f = 0 )

Constructs a grid view.

The parent, name and widget flag, f, arguments are passed to the Q3ScrollView constructor.

Q3GridView::~Q3GridView ()

Destroys the grid view.

QRect Q3GridView::cellGeometry ( int row, int column )

Returns the geometry of cell (row, column) in the content coordinate system.

See also cellRect().

QRect Q3GridView::cellRect () const

Returns the geometry of a cell in a cell's coordinate system. This is a convenience function useful in paintCell(). It is equivalent to QRect(0, 0, cellWidth(), cellHeight()).

See also cellGeometry().

int Q3GridView::columnAt ( int x ) const

Returns the number of the column at position x. x must be given in content coordinates.

See also rowAt().

void Q3GridView::dimensionChange ( int oldNumRows, int oldNumCols ) [virtual protected]

This change handler is called whenever any of the grid's dimensions change. oldNumRows and oldNumCols contain the old dimensions, numRows() and numCols() contain the new dimensions.

void Q3GridView::drawContents ( QPainter * p, int cx, int cy, int cw, int ch ) [virtual protected]

Reimplemented from Q3ScrollView::drawContents().

void Q3GridView::ensureCellVisible ( int row, int column )

Ensures cell (row, column) is visible, scrolling the grid view if necessary.

QSize Q3GridView::gridSize () const

Returns the size of the grid in pixels.

void Q3GridView::paintCell ( QPainter * p, int row, int col ) [pure virtual protected]

This pure virtual function is called to paint the single cell at (row, col) using painter p. The painter must be open when paintCell() is called and must remain open.

The coordinate system is translated so that the origin is at the top-left corner of the cell to be painted, i.e. cell coordinates. Do not scale or shear the coordinate system (or if you do, restore the transformation matrix before you return).

The painter is not clipped by default in order to get maximum efficiency. If you want clipping, use

 p->setClipRect(cellRect(), QPainter::CoordPainter);
 //... your drawing code
 p->setClipping(false);

void Q3GridView::paintEmptyArea ( QPainter * p, int cx, int cy, int cw, int ch ) [virtual protected]

This function fills the cw pixels wide and ch pixels high rectangle starting at position (cx, cy) with the background color using the painter p.

paintEmptyArea() is invoked by drawContents() to erase or fill unused areas.

void Q3GridView::repaintCell ( int row, int column, bool erase = true )

Repaints cell (row, column).

If erase is true, Qt erases the area of the cell before the paintCell() call; otherwise no erasing takes place.

See also QWidget::repaint().

int Q3GridView::rowAt ( int y ) const

Returns the number of the row at position y. y must be given in content coordinates.

See also columnAt().

void Q3GridView::updateCell ( int row, int column )

Updates cell (row, column).

See also QWidget::update().