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Add a method to change the parent of a layout. Make isEmpty() non-virtual, and instead always equal to (count()==0). Add invalidate() method which is used like the method of the same name in QLayout to invalidate cached information in the layout.

Browse Source 
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=706937
This commit is contained in:
Robert Knight 2007-08-31 15:27:32 +00:00
parent af8659fa22
commit f7861353ba
2 changed files with 50 additions and 4 deletions
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41
widgets/layout.cpp
View File

@ -21,6 +21,9 @@
#include <math.h>
#include <QtCore/QList>
#include <QtDebug>
#include "widget.h"
namespace Plasma
{
@ -52,6 +55,10 @@ Layout::Layout(LayoutItem *parent)
{
}
void Layout::setParent(LayoutItem *parent) {
d->parent = parent;
}
Layout::~Layout()
{
if (parent()) {
@ -60,11 +67,41 @@ Layout::~Layout()
delete d;
}
bool Layout::isEmpty() const
{
return count() == 0;
}
void Layout::update()
{
// this will force an update
setGeometry( parent()->geometry() );
setGeometry(geometry());
}
void Layout::invalidate()
{
//qDebug() << "Layout update";
LayoutItem *item = parent();
while ( item ) {
//qDebug() << "Looking at item " << item;
Widget *widget = dynamic_cast<Widget*>(item);
if ( widget ) {
//qDebug() << "Parent widget found and invalidated";
widget->updateGeometry();
break;
}
else {
Layout *layout = dynamic_cast<Layout*>(item);
if ( layout ) {
item = layout->parent();
// qDebug() << "Item is a layout";
}
else
item = 0;
}
}
}
LayoutAnimator* Layout::animator() const
{

11
widgets/layout.h
View File

@ -78,6 +78,11 @@ class PLASMA_EXPORT Layout : public LayoutItem
*/
LayoutItem *parent() const;
/**
* Sets the parent of this layout.
*/
void setParent(LayoutItem *parent);
/**
* Returns the number of elements of this Layout.
*/
@ -86,7 +91,7 @@ class PLASMA_EXPORT Layout : public LayoutItem
/**
* Returns true if this Layout contains no elements, false otherwise.
*/
virtual bool isEmpty() const = 0;
bool isEmpty() const;
/**
* Adds a Item to this Layout.
@ -143,6 +148,10 @@ class PLASMA_EXPORT Layout : public LayoutItem
* implementation allows unlimited resizing.
*/
virtual QSizeF maximumSize() const;
/** TODO Document me */
void invalidate();
private:
class Private;
Private *const d;