# KDChart::LineLayoutItem Class Reference

`#include <KDChartLayoutItems.h>`

Inheritance diagram for KDChart::LineLayoutItem:

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Collaboration diagram for KDChart::LineLayoutItem:
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List of all members.

## Public Member Functions

virtual Qt::Orientations | expandingDirections () const
virtual QRect | geometry () const
virtual bool | isEmpty () const
| LineLayoutItem (AbstractDiagram *diagram, int length, const QPen &pen, Qt::Alignment alignment=0)
virtual QSize | maximumSize () const
virtual QSize | minimumSize () const
virtual void | paint (QPainter *)
virtual void | paintAll (QPainter &painter)
| Default impl: just call paint.
virtual void | paintCtx (PaintContext *context)
| Default impl: Paint the complete item using its layouted position and size.
QLayout * | parentLayout ()
void | removeFromParentLayout ()
virtual void | setGeometry (const QRect &r)
void | setParentLayout (QLayout *lay)
virtual void | setParentWidget (QWidget *widget)
| Inform the item about its widget: This enables the item, to trigger that widget's update, whenever the size of the item's contents has changed.
virtual QSize | sizeHint () const
virtual void | sizeHintChanged () const
| Report changed size hint: ask the parent widget to recalculate the layout.

## Static Public Member Functions

void | paintIntoRect (QPainter *painter, const QRect &rect, const QPen &pen)

## Protected Attributes

QWidget * | mParent
QLayout * | mParentLayout

## Constructor & Destructor Documentation

KDChart::LineLayoutItem::LineLayoutItem | ( | AbstractDiagram * | diagram,
|  | int | length,
|  | const QPen & | pen,
|  | Qt::Alignment | alignment = 0
| ) |

Definition at line 612 of file KDChartLayoutItems.cpp.

    00616     : AbstractLayoutItem( alignment )
    00617     , mDiagram( diagram )
    00618     , mLength( length )
    00619     , mPen( pen )
    00620 {
    00621     //have a mini pen width
    00622     if ( pen.width() < 2 )
    00623         mPen.setWidth( 2 );
    00624 }

## Member Function Documentation

Qt::Orientations KDChart::LineLayoutItem::expandingDirections | ( |  | ) | const`[virtual]`

Definition at line 626 of file KDChartLayoutItems.cpp.

    00627 {
    00628     return 0; // Grow neither vertically nor horizontally
    00629 }

QRect KDChart::LineLayoutItem::geometry | ( |  | ) | const`[virtual]`

Definition at line 631 of file KDChartLayoutItems.cpp.

    00632 {
    00633     return mRect;
    00634 }

bool KDChart::LineLayoutItem::isEmpty | ( |  | ) | const`[virtual]`

Definition at line 636 of file KDChartLayoutItems.cpp.

    00637 {
    00638     return false; // never empty, otherwise the layout item would not exist
    00639 }

QSize KDChart::LineLayoutItem::maximumSize | ( |  | ) | const`[virtual]`

Definition at line 641 of file KDChartLayoutItems.cpp.

References sizeHint().

    00642 {
    00643     return sizeHint(); // PENDING(kalle) Review, quite inflexible
    00644 }

QSize KDChart::LineLayoutItem::minimumSize | ( |  | ) | const`[virtual]`

Definition at line 646 of file KDChartLayoutItems.cpp.

References sizeHint().

    00647 {
    00648     return sizeHint(); // PENDING(kalle) Review, quite inflexible
    00649 }

void KDChart::LineLayoutItem::paint | ( | QPainter * |  | ) | `[virtual]`

Implements KDChart::AbstractLayoutItem.

Definition at line 661 of file KDChartLayoutItems.cpp.

References paintIntoRect().

    00662 {
    00663     paintIntoRect( painter, mRect, mPen );
    00664 }

void KDChart::AbstractLayoutItem::paintAll | ( | QPainter & | painter | ) | `[virtual, inherited]`

Default impl: just call paint.

Derived classes like KDChart::AbstractArea are providing additional action here.

Reimplemented in KDChart::AbstractArea, and KDChart::TextArea.

Definition at line 69 of file KDChartLayoutItems.cpp.

References KDChart::AbstractLayoutItem::paint().

    00070 {
    00071     paint( &painter );
    00072 }

void KDChart::AbstractLayoutItem::paintCtx | ( | PaintContext * | context | ) | `[virtual, inherited]`

Default impl: Paint the complete item using its layouted position and size.

Reimplemented in KDChart::CartesianAxis.

Definition at line 77 of file KDChartLayoutItems.cpp.

References KDChart::AbstractLayoutItem::paint(), and KDChart::PaintContext::painter().

    00078 {
    00079     if( context )
    00080         paint( context->painter() );
    00081 }

void KDChart::LineLayoutItem::paintIntoRect | ( | QPainter * | painter,
|  | const QRect & | rect,
|  | const QPen & | pen
| ) | `[static]`

Definition at line 666 of file KDChartLayoutItems.cpp.

Referenced by paint().

    00670 {
    00671     if( ! rect.isValid() )
    00672         return;
    00673
    00674     const QPen oldPen = painter->pen();
    00675     painter->setPen( pen );
    00676     const qreal y = rect.center().y();
    00677     painter->drawLine( QPointF( rect.left(), y ),
    00678                        QPointF( rect.right(), y ) );
    00679     painter->setPen( oldPen );
    00680 }

QLayout* KDChart::AbstractLayoutItem::parentLayout | ( |  | ) | `[inherited]`

Definition at line 74 of file KDChartLayoutItems.h.

    00075         {
    00076             return mParentLayout;
    00077         }

void KDChart::AbstractLayoutItem::removeFromParentLayout | ( |  | ) | `[inherited]`

Definition at line 78 of file KDChartLayoutItems.h.

Referenced by KDChart::Chart::takeCoordinatePlane().

    00079         {
    00080             if( mParentLayout ){
    00081                 if( widget() )
    00082                     mParentLayout->removeWidget( widget() );
    00083                 else
    00084                     mParentLayout->removeItem( this );
    00085             }
    00086         }

void KDChart::LineLayoutItem::setGeometry | ( | const QRect & | r | ) | `[virtual]`

Definition at line 651 of file KDChartLayoutItems.cpp.

    00652 {
    00653     mRect = r;
    00654 }

void KDChart::AbstractLayoutItem::setParentLayout | ( | QLayout * | lay | ) | `[inherited]`

Definition at line 70 of file KDChartLayoutItems.h.

    00071         {
    00072             mParentLayout = lay;
    00073         }

void KDChart::AbstractLayoutItem::setParentWidget | ( | QWidget * | widget | ) | `[virtual, inherited]`

Inform the item about its widget: This enables the item, to trigger that widget's update, whenever the size of the item's contents has changed.

Thus, you need to call setParentWidget on every item, that has a non-fixed size.

Definition at line 64 of file KDChartLayoutItems.cpp.

References KDChart::AbstractLayoutItem::mParent.

Referenced by KDChart::Legend::buildLegend(), and KDChart::AbstractCartesianDiagram::takeAxis().

    00065 {
    00066     mParent = widget;
    00067 }

QSize KDChart::LineLayoutItem::sizeHint | ( |  | ) | const`[virtual]`

Definition at line 656 of file KDChartLayoutItems.cpp.

Referenced by maximumSize(), and minimumSize().

    00657 {
    00658     return QSize( mLength, mPen.width()+2 );
    00659 }

void KDChart::AbstractLayoutItem::sizeHintChanged | ( |  | ) | const`[virtual, inherited]`

Report changed size hint: ask the parent widget to recalculate the layout.

Definition at line 86 of file KDChartLayoutItems.cpp.

Referenced by KDChart::TextLayoutItem::sizeHint().

    00087 {
    00088     // This is exactly like what QWidget::updateGeometry does.
    00089 //  qDebug("KDChart::AbstractLayoutItem::sizeHintChanged() called");
    00090     if( mParent ) {
    00091         if ( mParent->layout() )
    00092             mParent->layout()->invalidate();
    00093         else
    00094             QApplication::postEvent( mParent, new QEvent( QEvent::LayoutRequest ) );
    00095     }
    00096 }

## Member Data Documentation

QWidget* KDChart::AbstractLayoutItem::mParent `[protected, inherited]`

| Definition at line 88 of file KDChartLayoutItems.h. Referenced by KDChart::AbstractLayoutItem::setParentWidget().

QLayout* KDChart::AbstractLayoutItem::mParentLayout `[protected, inherited]`

| Definition at line 89 of file KDChartLayoutItems.h.

The documentation for this class was generated from the following files:

- KDChartLayoutItems.h
- KDChartLayoutItems.cpp