- 10 properties inherited from Q3ScrollView
- 2 properties inherited from Q3Frame
- 6 properties inherited from QFrame
- 58 properties inherited from QWidget
- 1 property inherited from QObject
|Q3GridView(QWidget * parent = 0, const char * name = 0, Qt::WindowFlags f = 0)|
|QRect||cellGeometry(int row, int column)|
|int||columnAt(int x) const|
|void||ensureCellVisible(int row, int column)|
|void||repaintCell(int row, int column, bool erase = true)|
|int||rowAt(int y) const|
|void||updateCell(int row, int column)|
- 49 public functions inherited from Q3ScrollView
- 4 public functions inherited from Q3Frame
- 14 public functions inherited from QFrame
- 220 public functions inherited from QWidget
- 29 public functions inherited from QObject
- 12 public functions inherited from QPaintDevice
|virtual void||dimensionChange(int oldNumRows, int oldNumCols)|
|virtual void||paintCell(QPainter * p, int row, int col) = 0|
|virtual void||paintEmptyArea(QPainter * p, int cx, int cy, int cw, int ch)|
Reimplemented Protected Functions
|virtual void||drawContents(QPainter * p, int cx, int cy, int cw, int ch)|
- 26 protected functions inherited from Q3ScrollView
- 5 protected functions inherited from Q3Frame
- 3 protected functions inherited from QFrame
- 37 protected functions inherited from QWidget
- 8 protected functions inherited from QObject
- 1 protected function inherited from QPaintDevice
Additional Inherited Members
- 8 public slots inherited from Q3ScrollView
- 19 public slots inherited from QWidget
- 1 public slot inherited from QObject
- 5 signals inherited from Q3ScrollView
- 1 signal inherited from QWidget
- 1 signal inherited from QObject
- 4 static public members inherited from QWidget
- 7 static public members inherited from QObject
- 1 protected slot inherited from QWidget
The Q3GridView class provides an abstract base for fixed-size grids.
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.
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).
Q3GridView is a very simple abstract class based on Q3ScrollView. 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 Q3Table instead. If you need a simple list of items, use a Q3ListBox. If you need to present hierarichal data use a Q3ListView, and if you need random objects at random positions, consider using either a Q3IconView or a Q3Canvas.
This property holds the height of a grid row.
All rows in a grid view have the same height.
See also cellWidth.
This property holds the width of a grid column.
All columns in a grid view have the same width.
See also cellHeight.
This property holds the number of columns in the grid.
See also numRows.
This property holds the number of rows in the grid.
See also numCols.
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.
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
See also cellGeometry().
Returns the number of the column at position x. x must be given in content coordinates.
See also rowAt().
[virtual protected] void Q3GridView::drawContents(QPainter * p, int cx, int cy, int cw, int ch)
Reimplemented from Q3ScrollView::drawContents().
Ensures cell (row, column) is visible, scrolling the grid view if necessary.
QSize Q3GridView::gridSize() const
Returns the size of the grid in pixels.
[pure virtual protected] void Q3GridView::paintCell(QPainter * p, int row, int col)
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);
[virtual protected] void Q3GridView::paintEmptyArea(QPainter * p, int cx, int cy, int cw, int ch)
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.
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().
Returns the number of the row at position y. y must be given in content coordinates.
See also columnAt().
Updates cell (row, column).
See also QWidget::update().
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