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The QGridView class provides an abstract base for fixed-size grids. More...
List of all member functions.
A grid view consists of a number of abstract cells organized in rows and columns. The cells have a fixed size and are identified with a row index and a column index. The top-left cell is in row 0, column 0. The bottom-right cell is in row numRows()-1, column numCols()-1.
You can define numRows, numCols, cellWidth and cellHeight. Reimplement the pure virtual function paintCell() to draw the contents of a cell.
With ensureCellVisible(), you can ensure a certain cell is visible. With rowAt() and columnAt() you can find a cell based on the given x- and y-coordinates.
If you need to monitor changes to the grid's dimensions (i.e. when numRows or numCols is changed), reimplement the dimensionChange() change handler.
Note: the row and column indices are always given in the order, row (vertical offset) then column (horizontal offset). This order is the opposite of all pixel operations, which are given in the order x (horizontal offset), y (vertical offset).
QGridView is a very simple abstract class based on QScrollView. It is designed to simplify the task of drawing many cells of the same size in a potentially scrollable canvas. If you need rows and columns with different sizes, use a QTable instead. If you need a simple list of items, use a QListBox. If you need to present hierachical data use a QListView, and if you need random objects at random positions, consider using either a QIconView or a QCanvas.
See also Abstract Widget Classes.
The parent, name and widget flag, f, arguments are passed to the QScrollView constructor.
See also cellRect().
Returns the height of a grid row. See the "cellHeight" property for details.
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().
Returns the width of a grid column. See the "cellWidth" property for details.
Returns the number of the column at position x. x must be given in content coordinates.
See also rowAt().
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.
Returns the size of the grid in pixels.
Returns the number of columns in the grid. See the "numCols" property for details.
Returns the number of rows in the grid. See the "numRows" property for details.
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 );
paintEmptyArea() is invoked by drawContents() to erase or fill unused areas.
If erase is TRUE, Qt erases the area of the cell before the paintCell() call; otherwise no erasing takes place.
See also QWidget::repaint().
Returns the number of the row at position y. y must be given in content coordinates.
See also columnAt().
Sets the height of a grid row. See the "cellHeight" property for details.
Sets the width of a grid column. See the "cellWidth" property for details.
Sets the number of columns in the grid. See the "numCols" property for details.
Sets the number of rows in the grid. See the "numRows" property for details.
See also QWidget::update().
This property holds the height of a grid row.
All rows in a grid view have the same height.
See also cellWidth.
Set this property's value with setCellHeight() and get this property's value with cellHeight().
This property holds the width of a grid column.
All columns in a grid view have the same width.
See also cellHeight.
Set this property's value with setCellWidth() and get this property's value with cellWidth().
This property holds the number of columns in the grid.
Set this property's value with setNumCols() and get this property's value with numCols().
See also numRows.
This property holds the number of rows in the grid.
Set this property's value with setNumRows() and get this property's value with numRows().
See also numCols.
This file is part of the Qt toolkit. Copyright © 1995-2007 Trolltech. All Rights Reserved.
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