KGantt::AbstractRowController

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KGantt::AbstractRowController Class Referenceabstract

#include <KGanttAbstractRowController>

Inheritance diagram for KGantt::AbstractRowController:

Public Member Functions

 AbstractRowController ()
 
virtual ~AbstractRowController ()
 
virtual int headerHeight () const =0
 
virtual QModelIndex indexAbove (const QModelIndex &idx) const =0
 
virtual QModelIndex indexAt (int height) const =0
 
virtual QModelIndex indexBelow (const QModelIndex &idx) const =0
 
virtual bool isRowExpanded (const QModelIndex &idx) const =0
 
virtual bool isRowVisible (const QModelIndex &idx) const =0
 
virtual int maximumItemHeight () const =0
 
virtual Span rowGeometry (const QModelIndex &idx) const =0
 
virtual int totalHeight () const =0
 

Detailed Description

Abstract baseclass for row controllers. A row controller is used by the GraphicsView to nagivate the model and to determine the row geometries.

Definition at line 28 of file kganttabstractrowcontroller.h.

Constructor & Destructor Documentation

AbstractRowController::AbstractRowController ( )

Constructor. Does nothing

Definition at line 14 of file kganttabstractrowcontroller.cpp.

AbstractRowController::~AbstractRowController ( )
virtual

Destructor. Does nothing

Definition at line 19 of file kganttabstractrowcontroller.cpp.

Member Function Documentation

int KGantt::AbstractRowController::headerHeight ( ) const
pure virtual
Returns
The height of the header part of the view.

Implement this to control how much space is reserved at the top of the view for a header

Implemented in KGantt::ListViewRowController, and KGantt::TreeViewRowController.

QModelIndex KGantt::AbstractRowController::indexAbove ( const QModelIndex idx) const
pure virtual
Returns
The modelindex for the previous row before idx.
See also
QTreeView::indexAbove

Implemented in KGantt::ListViewRowController, and KGantt::TreeViewRowController.

QModelIndex KGantt::AbstractRowController::indexBelow ( const QModelIndex idx) const
pure virtual
Returns
The modelindex for the next row after idx.
See also
QTreeView::indexBelow

Implemented in KGantt::ListViewRowController, and KGantt::TreeViewRowController.

bool KGantt::AbstractRowController::isRowVisible ( const QModelIndex idx) const
pure virtual
Returns
true if the row containing index idx is visible in the view.

Implement this to allow KGantt to optimize how items on screen are created. It is not harmful to always return true here, but the View will not perform optimally.

Implemented in KGantt::ListViewRowController, and KGantt::TreeViewRowController.

Span KGantt::AbstractRowController::rowGeometry ( const QModelIndex idx) const
pure virtual
Returns
A Span consisting of the row offset and height for the row containing idx. A simple implementation might look like
Span MyRowCtrlr::rowGeometry(const QModelIndex& idx)
{
return Span(idx.row()*10,10);
}

Implemented in KGantt::ListViewRowController, and KGantt::TreeViewRowController.

int KGantt::AbstractRowController::totalHeight ( ) const
pure virtual
Returns
the total height of the rows. For uniformly sized rows that would be number_of_rows*row_height.

Implemented in KGantt::ListViewRowController, and KGantt::TreeViewRowController.


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