The QGridView class provides an abstract base for fixed-size grids. Más...

#include <qgridview.h>

Diagrama de herencias de QGridView

Métodos públicos
	QGridView (QWidget parent=0, const char name=0, WFlags f=0)
	~QGridView ()
int	numRows () const
virtual void	setNumRows (int)
int	numCols () const
virtual void	setNumCols (int)
int	cellWidth () const
virtual void	setCellWidth (int)
int	cellHeight () const
virtual void	setCellHeight (int)
QRect	cellRect () const
QRect	cellGeometry (int row, int column)
QSize	gridSize () const
int	rowAt (int y) const
int	columnAt (int x) const
void	repaintCell (int row, int column, bool erase=TRUE)
void	updateCell (int row, int column)
void	ensureCellVisible (int row, int column)
	QGridView (QWidget parent=0, const char name=0, WFlags f=0)
	~QGridView ()
int	numRows () const
virtual void	setNumRows (int)
int	numCols () const
virtual void	setNumCols (int)
int	cellWidth () const
virtual void	setCellWidth (int)
int	cellHeight () const
virtual void	setCellHeight (int)
QRect	cellRect () const
QRect	cellGeometry (int row, int column)
QSize	gridSize () const
int	rowAt (int y) const
int	columnAt (int x) const
void	repaintCell (int row, int column, bool erase=TRUE)
void	updateCell (int row, int column)
void	ensureCellVisible (int row, int column)
Métodos protegidos
virtual void	paintCell (QPainter *, int row, int col)=0
virtual void	paintEmptyArea (QPainter *p, int cx, int cy, int cw, int ch)
void	drawContents (QPainter *p, int cx, int cy, int cw, int ch)
virtual void	dimensionChange (int, int)
virtual void	paintCell (QPainter *, int row, int col)=0
virtual void	paintEmptyArea (QPainter *p, int cx, int cy, int cw, int ch)
void	drawContents (QPainter *p, int cx, int cy, int cw, int ch)
virtual void	dimensionChange (int, int)
Propiedades
int	numRows
	The number of rows in the grid.
int	numCols
	The number of columns in the grid.
int	cellWidth
	The width of a grid column.
int	cellHeight
	The height of a grid row.

Descripción detallada

The QGridView 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.

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.

Documentación del constructor y destructor

QGridView::QGridView	(	QWidget *	parent = `0`,
		const char *	name = `0`,
		WFlags	f = `0`
	)

Constructs a grid view.

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

QGridView::~QGridView ( )

Destroys the grid view.

QGridView::QGridView	(	QWidget *	parent = `0`,
		const char *	name = `0`,
		WFlags	f = `0`
	)

QGridView::~QGridView ( )

Documentación de las funciones miembro

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

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

Ver también:: cellRect()

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

int QGridView::cellHeight ( ) const

QRect QGridView::cellRect ( ) const [inline]

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() ).

Ver también:: cellGeometry()

QRect QGridView::cellRect ( ) const

int QGridView::cellWidth ( ) const

int QGridView::columnAt ( int x ) const

int QGridView::columnAt ( int x ) const [inline]

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

Ver también:: rowAt()

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

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.

Reimplementado en QWellArray.

virtual void QGridView::dimensionChange	(	int	,
		int
	)		`[protected, virtual]`

Reimplementado en QWellArray.

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

Reimplementado de QScrollView.

void QGridView::drawContents	(	QPainter *	p,
		int	clipx,
		int	clipy,
		int	clipw,
		int	cliph
	)		`[protected, virtual]`

Reimplement this function if you are viewing a drawing area rather than a widget.

The function should draw the rectangle (clipx, clipy, clipw, cliph) of the contents using painter p. The clip rectangle is in the scrollview's coordinates.

For example:

    {
        // Fill a 40000 by 50000 rectangle at (100000,150000)

        // Calculate the coordinates...
        int x1 = 100000, y1 = 150000;
        int x2 = x1+40000-1, y2 = y1+50000-1;

        // Clip the coordinates so X/Windows will not have problems...
        if (x1 < clipx) x1=clipx;
        if (y1 < clipy) y1=clipy;
        if (x2 > clipx+clipw-1) x2=clipx+clipw-1;
        if (y2 > clipy+cliph-1) y2=clipy+cliph-1;

        // Paint using the small coordinates...
        if ( x2 >= x1 && y2 >= y1 )
            p->fillRect(x1, y1, x2-x1+1, y2-y1+1, red);
    }

The clip rectangle and translation of the painter p is already set appropriately.

Reimplementado de QScrollView.

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

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

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

QSize QGridView::gridSize ( ) const [inline]

Returns the size of the grid in pixels.

QSize QGridView::gridSize ( ) const

int QGridView::numCols ( ) const

int QGridView::numRows ( ) const

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

Implementado en VDateInternalMonthPicker, VDateTable y QWellArray.

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

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 );

Implementado en VDateInternalMonthPicker, VDateTable y QWellArray.

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

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.

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

void QGridView::repaintCell	(	int	row,
		int	column,
		bool	erase = `TRUE`
	)

void QGridView::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.

Ver también:: QWidget::repaint()

int QGridView::rowAt ( int y ) const

int QGridView::rowAt ( int y ) const [inline]

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

Ver también:: columnAt()

void QGridView::setCellHeight ( int cellHeight ) [virtual]

virtual void QGridView::setCellHeight ( int ) [virtual]

virtual void QGridView::setCellWidth ( int ) [virtual]

void QGridView::setCellWidth ( int cellWidth ) [virtual]

virtual void QGridView::setNumCols ( int ) [virtual]

void QGridView::setNumCols ( int numCols ) [virtual]

virtual void QGridView::setNumRows ( int ) [virtual]

void QGridView::setNumRows ( int numRows ) [virtual]

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

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

Updates cell (row, column).

Ver también:: QWidget::update()

Documentación de propiedades

int QGridView::cellHeight [inline, read, write]

The height of a grid row.

All rows in a grid view have the same height.

Ver también:: cellWidth

int QGridView::cellWidth [inline, read, write]

The width of a grid column.

All columns in a grid view have the same width.

Ver también:: cellHeight

int QGridView::numCols [inline, read, write]

The number of columns in the grid.

Ver también:: numRows

int QGridView::numRows [inline, read, write]

The number of rows in the grid.

Ver también:: numCols

La documentación para esta clase fue generada a partir de los siguientes ficheros:

src/qt/include/qgridview.h
src/qt/src/widgets/qgridview.h
src/qt/src/widgets/qgridview.cpp

Métodos públicos

Métodos protegidos

Propiedades

Descripción detallada

Documentación del constructor y destructor

Documentación de las funciones miembro

Documentación de propiedades