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timlinux
committedMay 19, 2008
Created a custom view delegate for displaying in lists like the plugin manager and the grass toolbox.
The delegate allows displaying a title (in bold) and a description underneath it (in normal font), without needing to resort to using tables & columns. The delegate currently works in two modes: 1) Direct rendering of item onto a painter 2) Renderng the item via a qgsdetaileditemwidget (disabled for not as its experimental) THe qgsdetailed item data class is a new qvariant type that can be used to pass title, description etc between the model and the view. git-svn-id: http://svn.osgeo.org/qgis/trunk@8463 c8812cc2-4d05-0410-92ff-de0c093fc19c
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ltr-3_40Before-merge-new_vector_api
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‎src/gui/qgsdetaileditemdata.cpp

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/***************************************************************************
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qgsdetailedlistdata.cpp - A data represenation for a rich QItemData subclass
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-------------------
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begin : Sat May 17 2008
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copyright : (C) 2008 Tim Sutton
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email : tim@linfiniti.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id:$ */
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#include "qgsdetaileditemdata.h"
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QgsDetailedItemData::QgsDetailedItemData()
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{
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}
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QgsDetailedItemData::~QgsDetailedItemData()
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{
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}
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void QgsDetailedItemData::setTitle(QString theTitle)
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{
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mTitle=theTitle;
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}
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void QgsDetailedItemData::setDetail(QString theDetail)
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{
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mDetail=theDetail;
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}
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QString QgsDetailedItemData::title()
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{
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return mTitle;
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}
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QString QgsDetailedItemData::detail()
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{
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return mDetail;
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}

‎src/gui/qgsdetaileditemdata.h

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/***************************************************************************
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qgsdetaileditemdata.h - A data represenation for a rich QItemData subclass
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-------------------
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begin : Sat May 17 2008
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copyright : (C) 2008 Tim Sutton
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email : tim@linfiniti.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id:$ */
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#ifndef QGSDETAILEDITEMDATA_H
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#define QGSDETAILEDITEMDATA_H
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#include <QMetaType>
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#include <QString>
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/** This class is the data only representation of a
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* QgsDetailedItemWidget, designed to be used in custom views.
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*/
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class QgsDetailedItemData
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{
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public:
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QgsDetailedItemData();
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~QgsDetailedItemData();
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void setTitle(QString theTitle);
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void setDetail(QString theDetail);
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QString title();
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QString detail();
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private:
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QString mTitle;
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QString mDetail;
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QString mLibraryName;
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bool mCheckBoxEnabled;
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};
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// Make QVariant aware of this data type (see qtdocs star
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// rating delegate example for more details)
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Q_DECLARE_METATYPE(QgsDetailedItemData)
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#endif //QGSDETAILEDITEMDATA_H

‎src/gui/qgsdetaileditemdelegate.cpp

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/***************************************************************************
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qgsdetailedlistwidget.cpp - A rich QItemDelegate subclass
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-------------------
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begin : Sat May 17 2008
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copyright : (C) 2008 Tim Sutton
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email : tim@linfiniti.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id:$ */
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#include "qgsdetaileditemdelegate.h"
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#include "qgsdetaileditemwidget.h"
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#include "qgsdetaileditemdata.h"
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#include <QPainter>
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#include <QFont>
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#include <QFontMetrics>
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#include <QStyleOptionViewItem>
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#include <QModelIndex>
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#include <QCheckBox>
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#include <QLinearGradient>
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QgsDetailedItemDelegate::QgsDetailedItemDelegate(QObject * parent) :
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QAbstractItemDelegate(parent),
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mpWidget(new QgsDetailedItemWidget()),
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mpCheckBox(new QCheckBox())
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{
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mpCheckBox->resize(16,16);
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}
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QgsDetailedItemDelegate::~QgsDetailedItemDelegate()
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{
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delete mpCheckBox;
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delete mpWidget;
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}
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void QgsDetailedItemDelegate::paint(QPainter * thepPainter,
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const QStyleOptionViewItem & theOption,
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const QModelIndex & theIndex) const
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{
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if (qVariantCanConvert<QgsDetailedItemData>(theIndex.data(Qt::UserRole)))
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{
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QgsDetailedItemData myData =
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qVariantValue<QgsDetailedItemData>(theIndex.data(Qt::UserRole));
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bool myCheckState = theIndex.model()->data(theIndex, Qt::CheckStateRole).toBool();
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mpWidget->setChecked(myCheckState);
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mpWidget->setData(myData);
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mpWidget->resize(theOption.rect.width(),mpWidget->height());
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mpWidget->setAutoFillBackground(false);
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mpWidget->show();
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mpWidget->repaint();
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if (theOption.state & QStyle::State_Selected)
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{
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QColor myColor1 = theOption.palette.highlight();
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QColor myColor2 = myColor1;
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myColor2 = myColor2.lighter();
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QLinearGradient myGradient(QPointF(0,theOption.rect.y()),
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QPointF(0,theOption.rect.y() + mpWidget->height()));
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myGradient.setColorAt(0, myColor1);
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myGradient.setColorAt(0.1, myColor2);
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myGradient.setColorAt(0.5, myColor1);
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myGradient.setColorAt(0.9, myColor2);
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myGradient.setColorAt(1, myColor2);
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thepPainter->fillRect(theOption.rect, QBrush(myGradient));
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}
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QPixmap myPixmap(mpWidget->size());
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mpWidget->render(&myPixmap);
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thepPainter->drawPixmap(theOption.rect.x(),
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theOption.rect.y(),
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myPixmap);
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}
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else
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{
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// After painting we need to restore the painter to its original state
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thepPainter->save();
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//
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// Get the strings and check box properties
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//
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QString myString = theIndex.model()->data(theIndex, Qt::DisplayRole).toString();
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QString myDetailString = theIndex.model()->data(theIndex, Qt::UserRole).toString();
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bool myCheckState = theIndex.model()->data(theIndex, Qt::CheckStateRole).toBool();
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mpCheckBox->setChecked(myCheckState);
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QPixmap myPixmap(mpCheckBox->size());
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mpCheckBox->render(&myPixmap); //we will draw this onto the widget further down
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//
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// Calculate the widget height and other metrics
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//
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QFont myFont = theOption.font;
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QFont myBoldFont = myFont;
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myBoldFont.setBold(true);
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myBoldFont.setPointSize(myFont.pointSize() + 3);
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QFontMetrics myMetrics(myBoldFont);
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int myVerticalSpacer = 3; //spacing between title and description
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int myHorizontalSpacer = 5; //spacing between checkbox / icon and description
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int myTextStartX = theOption.rect.x() + myPixmap.width() + myHorizontalSpacer;
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int myHeight = myMetrics.height() + myVerticalSpacer;
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//
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// Draw the item background with a gradient if its highlighted
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//
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if (theOption.state & QStyle::State_Selected)
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{
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QColor myColor1 = theOption.palette.highlight();
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QColor myColor2 = myColor1;
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myColor2 = myColor2.lighter();
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int myHeight = myMetrics.height() + myVerticalSpacer;
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QLinearGradient myGradient(QPointF(0,theOption.rect.y()),
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QPointF(0,theOption.rect.y() + myHeight*2));
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myGradient.setColorAt(0, myColor1);
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myGradient.setColorAt(0.1, myColor2);
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myGradient.setColorAt(0.5, myColor1);
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myGradient.setColorAt(0.9, myColor2);
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myGradient.setColorAt(1, myColor2);
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thepPainter->fillRect(theOption.rect, QBrush(myGradient));
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}
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//
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// Draw the checkbox
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//
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thepPainter->drawPixmap(theOption.rect.x(),
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theOption.rect.y() + mpCheckBox->height(),
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myPixmap);
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//
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// Draw the title and description
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//
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thepPainter->setFont(myBoldFont);
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thepPainter->drawText( myTextStartX ,theOption.rect.y() + myHeight, myString);
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thepPainter->setFont(myFont); //return to original font set by client
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thepPainter->drawText( myTextStartX,
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theOption.rect.y() + (myHeight *2) - myVerticalSpacer,
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myDetailString);
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thepPainter->restore();
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}
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}
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QSize QgsDetailedItemDelegate::sizeHint(
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const QStyleOptionViewItem & theOption,
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const QModelIndex & theIndex ) const
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{
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if (qVariantCanConvert<QgsDetailedItemData>(theIndex.data(Qt::UserRole)))
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{
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return QSize(378,mpWidget->height());
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}
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else // fall back to hand calculated & hand drawn item
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{
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QFont myFont = theOption.font;
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QFont myBoldFont = myFont;
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myBoldFont.setBold(true);
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myBoldFont.setPointSize(myFont.pointSize() + 3);
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QFontMetrics myMetrics(myBoldFont);
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int myVerticalSpacer = 3; //spacing between title and description
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int myHorizontalSpacer = 5; //spacing between checkbox / icon and description
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int myHeight = myMetrics.height() + myVerticalSpacer;
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return QSize(50,
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myHeight *2 + myVerticalSpacer);
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}
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}

‎src/gui/qgsdetaileditemdelegate.h

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/***************************************************************************
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qgsdetaileditemdelegate.h - A rich QItemDelegate subclass
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-------------------
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begin : Sat May 17 2008
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copyright : (C) 2008 Tim Sutton
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email : tim@linfiniti.com
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***************************************************************************/
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9+
/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
13+
* the Free Software Foundation; either version 2 of the License, or *
14+
* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id:$ */
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#ifndef QGSDETAILEDITEMDELEGATE_H
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#define QGSDETAILEDITEMDELEGATE_H
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#include <QAbstractItemDelegate>
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#include <QString>
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class QCheckBox;
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class QgsDetailedItemWidget;
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class QgsDetailedItemDelegate :
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public QAbstractItemDelegate
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{
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Q_OBJECT;
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public:
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QgsDetailedItemDelegate(QObject * parent = 0);
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~QgsDetailedItemDelegate();
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void paint(QPainter * thePainter,
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const QStyleOptionViewItem & theOption,
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const QModelIndex & theIndex) const;
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QSize sizeHint( const QStyleOptionViewItem & theOption,
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const QModelIndex & theIndex ) const;
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private:
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QgsDetailedItemWidget * mpWidget;
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QCheckBox * mpCheckBox;
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};
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#endif //QGSDETAILEDITEMDELEGATE_H

‎src/gui/qgsdetaileditemwidget.cpp

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/***************************************************************************
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qgsdetailedlistwidget.cpp - A rich QItemWidget subclass
3+
-------------------
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begin : Sat May 17 2008
5+
copyright : (C) 2008 Tim Sutton
6+
email : tim@linfiniti.com
7+
***************************************************************************/
8+
9+
/***************************************************************************
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* *
11+
* This program is free software; you can redistribute it and/or modify *
12+
* it under the terms of the GNU General Public License as published by *
13+
* the Free Software Foundation; either version 2 of the License, or *
14+
* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id:$ */
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#include "qgsdetaileditemwidget.h"
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QgsDetailedItemWidget::QgsDetailedItemWidget(QWidget * parent) :
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QWidget(parent)
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{
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setupUi(this);
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}
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QgsDetailedItemWidget::~QgsDetailedItemWidget()
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{
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}
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void QgsDetailedItemWidget::setData(QgsDetailedItemData theData)
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{
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lblTitle->setText(theData.title());
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tbDetail->setText(theData.detail());
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}
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void QgsDetailedItemWidget::setChecked(bool theFlag)
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{
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cbx->setChecked(theFlag);
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}

‎src/gui/qgsdetaileditemwidget.h

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/***************************************************************************
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qgsdetaileditemwidget.h - A rich QItemWidget subclass
3+
-------------------
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begin : Sat May 17 2008
5+
copyright : (C) 2008 Tim Sutton
6+
email : tim@linfiniti.com
7+
***************************************************************************/
8+
9+
/***************************************************************************
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* *
11+
* This program is free software; you can redistribute it and/or modify *
12+
* it under the terms of the GNU General Public License as published by *
13+
* the Free Software Foundation; either version 2 of the License, or *
14+
* (at your option) any later version. *
15+
* *
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***************************************************************************/
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/* $Id:$ */
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#ifndef QGSDETAILEDITEMWIDGET_H
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#define QGSDETAILEDITEMWIDGET_H
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#include <ui_qgsdetaileditemwidgetbase.h>
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#include <qgsdetaileditemdata.h>
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class QgsDetailedItemWidget :
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public QWidget, private Ui::QgsDetailedItemWidgetBase
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{
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Q_OBJECT;
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public:
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QgsDetailedItemWidget(QWidget * parent = 0);
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~QgsDetailedItemWidget();
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void setData(QgsDetailedItemData theData);
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void setChecked(bool theFlag);
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private:
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QgsDetailedItemData mData;
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};
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#endif //QGSDETAILEDITEMWIDGET_H

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