Added support for showing the Stars on the DiveTable

For the stars on the dive table I had to rework a bit my
StarRating widget, because it used a pixmap for each widget
that were created. Not it uses only 2 pixmaps: the active
and inactive ones.

A new file was created named modeldelegates(h, cpp) that
should hold all delegates of the models. For the GTK / C
folks, a 'Delegate' ia s way to bypass the default behavior
of the view that's displaying the data.

I also added the code to display the stars if no delegate
is set ( good for debugging. )

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>

9 files changed, 110 insertions, 54 deletions

diff --git a/Makefile b/Makefile
index 6ebba4dd5..aac1759bc 100644
--- a/Makefile
+++ b/Makefile
@@ -37,6 +37,7 @@ HEADERS = \
 	qt-ui/models.h \
 	qt-ui/plotareascene.h \
 	qt-ui/starwidget.h \
+	qt-ui/modeldelegates.h \
 
 
 SOURCES = \
@@ -75,6 +76,7 @@ SOURCES = \
 	qt-ui/models.cpp \
 	qt-ui/plotareascene.cpp \
 	qt-ui/starwidget.cpp \
+	qt-ui/modeldelegates.cpp \
 	$(RESFILE)
 
 
diff --git a/qt-ui/divelistview.cpp b/qt-ui/divelistview.cpp
index 676d7c463..e8a3d2311 100644
--- a/qt-ui/divelistview.cpp
+++ b/qt-ui/divelistview.cpp
@@ -5,6 +5,8 @@
  *
  */
 #include "divelistview.h"
+#include "models.h"
+#include "modeldelegates.h"
 
 DiveListView::DiveListView(QWidget *parent) : QTreeView(parent)
 {
diff --git a/qt-ui/mainwindow.cpp b/qt-ui/mainwindow.cpp
index 8cdc60193..4c4143e98 100644
--- a/qt-ui/mainwindow.cpp
+++ b/qt-ui/mainwindow.cpp
@@ -20,7 +20,7 @@
 #include "../dive.h"
 #include "../divelist.h"
 #include "../pref.h"
-
+#include "modeldelegates.h"
 
 MainWindow::MainWindow() : ui(new Ui::MainWindow()),
 			   model(new DiveTripModel(this)),
@@ -69,6 +69,7 @@ void MainWindow::on_actionOpen_triggered()
 	model->deleteLater();
 	model = new DiveTripModel(this);
 	sortModel->setSourceModel(model);
+	ui->ListWidget->setItemDelegateForColumn(DiveTripModel::RATING, new StarWidgetsDelegate());
 }
 
 void MainWindow::on_actionSave_triggered()
diff --git a/qt-ui/modeldelegates.cpp b/qt-ui/modeldelegates.cpp
new file mode 100644
index 000000000..1bbf1061b
--- /dev/null
+++ b/qt-ui/modeldelegates.cpp
@@ -0,0 +1,36 @@
+#include "modeldelegates.h"
+#include "../dive.h"
+#include "../divelist.h"
+#include "starwidget.h"
+#include "models.h"
+
+#include <QtDebug>
+#include <QPainter>
+
+void StarWidgetsDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
+{
+	if (!index.isValid()){
+		return;
+	}
+
+	int rating = index.model()->data(index, DiveTripModel::DelegatesRole).toInt();
+
+	if (option.state & QStyle::State_Selected)
+         painter->fillRect(option.rect, option.palette.highlight());
+
+	painter->save();
+	painter->setRenderHint(QPainter::Antialiasing, true);
+
+	for(int i = 0; i < rating; i++)
+		painter->drawPixmap(option.rect.x() + i * IMG_SIZE + SPACING, option.rect.y(), StarWidget::starActive());
+
+	for(int i = rating; i < TOTALSTARS; i++)
+		painter->drawPixmap(option.rect.x() + i * IMG_SIZE + SPACING, option.rect.y(), StarWidget::starInactive());
+
+	painter->restore();
+}
+
+QSize StarWidgetsDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
+{
+	return QSize(IMG_SIZE * TOTALSTARS + SPACING * (TOTALSTARS-1), IMG_SIZE);
+}
diff --git a/qt-ui/modeldelegates.h b/qt-ui/modeldelegates.h
new file mode 100644
index 000000000..eacbb5a1e
--- /dev/null
+++ b/qt-ui/modeldelegates.h
@@ -0,0 +1,12 @@
+#ifndef MODELDELEGATES_H
+#define MODELDELEGATES_H
+
+#include <QAbstractItemDelegate>
+
+class StarWidgetsDelegate : public QAbstractItemDelegate {
+	Q_OBJECT
+public:
+    virtual void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;
+    virtual QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const;
+};
+#endif
diff --git a/qt-ui/models.cpp b/qt-ui/models.cpp
index 5f803766f..0944fe3e3 100644
--- a/qt-ui/models.cpp
+++ b/qt-ui/models.cpp
@@ -5,9 +5,6 @@
  *
  */
 #include "models.h"
-#include "../dive.h"
-#include "../divelist.h"
-
 #include <QtDebug>
 
 extern struct tank_info tank_info[100];
@@ -284,6 +281,7 @@ void TankInfoModel::update()
 	}
 }
 
+
 /*! A DiveItem for use with a DiveTripModel
  *
  * A simple class which wraps basic stats for a dive (e.g. duration, depth) and
@@ -314,6 +312,8 @@ public:
 		return tw.grams;
 	}
 
+	int diveRating() const { return dive->rating; }
+
 	QString displayDuration() const;
 	QString displayDepth() const;
 	QString displayTemperature() const;
@@ -335,6 +335,7 @@ private:
 	QList <DiveItem*> childlist;
 };
 
+
 DiveItem::DiveItem(struct dive *d, DiveItem *p):
 	dive(d),
 	parentItem(p)
@@ -490,6 +491,16 @@ QVariant DiveTripModel::data(const QModelIndex &index, int role) const
 			case LOCATION:
 				retVal = item->diveLocation();
 				break;
+			case RATING:
+				retVal = item->diveRating();
+				break;
+		}
+	}
+	if (role == DelegatesRole){
+		switch(index.column()){
+			case RATING:
+				retVal = item->diveRating();
+				break;
 		}
 	}
 	return retVal;
@@ -569,8 +580,6 @@ int DiveTripModel::rowCount(const QModelIndex &parent) const
 	return item ? item->children().count() : 0;
 }
 
-
-
 int DiveTripModel::columnCount(const QModelIndex &parent) const
 {
 	return parent.isValid() && parent.column() != 0 ? 0 : COLUMNS;
diff --git a/qt-ui/models.h b/qt-ui/models.h
index d64faf0bd..f4d9c8d3b 100644
--- a/qt-ui/models.h
+++ b/qt-ui/models.h
@@ -9,7 +9,7 @@
 
 #include <QAbstractTableModel>
 #include "../dive.h"
-
+#include "../divelist.h"
 /* Encapsulates the tank_info global variable
  * to show on Qt`s Model View System.*/
 class TankInfoModel : public QAbstractTableModel {
@@ -74,11 +74,12 @@ private:
 /*! An AbstractItemModel for recording dive trip information such as a list of dives.
 *
 */
-class DiveItem; // Represents a single item on the model, implemented in the .cpp since it's private for this class.
+class DiveItem;
 class DiveTripModel : public QAbstractItemModel
 {
 public:
 	enum Column {NR, DATE, RATING, DEPTH, DURATION, TEMPERATURE, TOTALWEIGHT, SUIT, CYLINDER, NITROX, SAC, OTU, MAXCNS, LOCATION, COLUMNS };
+	enum { DelegatesRole = Qt::UserRole };
 
 	DiveTripModel(QObject *parent = 0);
 
diff --git a/qt-ui/starwidget.cpp b/qt-ui/starwidget.cpp
index 866fb5834..4d1fa066c 100644
--- a/qt-ui/starwidget.cpp
+++ b/qt-ui/starwidget.cpp
@@ -5,32 +5,29 @@
 #include <QDebug>
 #include <QMouseEvent>
 
-int StarWidget::currentStars() const
-{
-	return current;
-}
+QPixmap* StarWidget::activeStar = 0;
+QPixmap* StarWidget::inactiveStar = 0;
 
-void StarWidget::enableHalfStars(bool enabled)
+QPixmap StarWidget::starActive()
 {
-	halfStar = enabled;
-	update();
+	return (*activeStar);
 }
 
-bool StarWidget::halfStarsEnabled() const
+QPixmap StarWidget::starInactive()
 {
-	return halfStar;
+	return (*inactiveStar);
 }
 
-int StarWidget::maxStars() const
+int StarWidget::currentStars() const
 {
-	return stars;
+	return current;
 }
 
 void StarWidget::mouseReleaseEvent(QMouseEvent* event)
 {
 	int starClicked = event->pos().x() / IMG_SIZE + 1;
-	if (starClicked > stars)
-		starClicked = stars;
+	if (starClicked > TOTALSTARS)
+		starClicked = TOTALSTARS;
 
 	if (current == starClicked)
 		current -= 1;
@@ -45,10 +42,10 @@ void StarWidget::paintEvent(QPaintEvent* event)
 	QPainter p(this);
 
 	for(int i = 0; i < current; i++)
-		p.drawPixmap(i * IMG_SIZE + SPACING, 0, activeStar);
+		p.drawPixmap(i * IMG_SIZE + SPACING, 0, starActive());
 
-	for(int i = current; i < stars; i++)
-		p.drawPixmap(i * IMG_SIZE + SPACING, 0, inactiveStar);
+	for(int i = current; i < TOTALSTARS; i++)
+		p.drawPixmap(i * IMG_SIZE + SPACING, 0, starInactive());
 }
 
 void StarWidget::setCurrentStars(int value)
@@ -58,27 +55,25 @@ void StarWidget::setCurrentStars(int value)
 	Q_EMIT valueChanged(current);
 }
 
-void StarWidget::setMaximumStars(int maximum)
-{
-	stars = maximum;
-	update();
-}
-
 StarWidget::StarWidget(QWidget* parent, Qt::WindowFlags f):
 	QWidget(parent, f),
-	stars(5),
-	current(0),
-	halfStar(false)
+	current(0)
 {
-	QSvgRenderer render(QString(":star"));
-	QPixmap renderedStar(IMG_SIZE, IMG_SIZE);
+	if(!activeStar){
+		activeStar = new QPixmap();
+		QSvgRenderer render(QString(":star"));
+		QPixmap renderedStar(IMG_SIZE, IMG_SIZE);
 
-	renderedStar.fill(Qt::transparent);
-	QPainter painter(&renderedStar);
+		renderedStar.fill(Qt::transparent);
+		QPainter painter(&renderedStar);
 
-	render.render(&painter, QRectF(0, 0, IMG_SIZE, IMG_SIZE));
-	activeStar = renderedStar;
-	inactiveStar = grayImage(&renderedStar);
+		render.render(&painter, QRectF(0, 0, IMG_SIZE, IMG_SIZE));
+		(*activeStar) = renderedStar;
+	}
+	if(!inactiveStar){
+		inactiveStar = new QPixmap();
+		(*inactiveStar) = grayImage(activeStar);
+	}
 }
 
 QPixmap StarWidget::grayImage(QPixmap* coloredImg)
@@ -86,17 +81,20 @@ QPixmap StarWidget::grayImage(QPixmap* coloredImg)
 	QImage img = coloredImg->toImage();
 	for (int i = 0; i < img.width(); ++i) {
 		for (int j = 0; j < img.height(); ++j) {
-			QRgb col = img.pixel(i, j);
-			if (!col)
+			QRgb rgb = img.pixel(i, j);
+			if (!rgb)
 				continue;
-			int gray = QColor(Qt::darkGray).rgb();
+
+			QColor c(rgb);
+			int gray = (c.red() + c.green() + c.blue()) / 3;
 			img.setPixel(i, j, qRgb(gray, gray, gray));
 		}
 	}
+
 	return QPixmap::fromImage(img);
 }
 
 QSize StarWidget::sizeHint() const
 {
-	return QSize(IMG_SIZE * stars + SPACING * (stars-1), IMG_SIZE);
+	return QSize(IMG_SIZE * TOTALSTARS + SPACING * (TOTALSTARS-1), IMG_SIZE);
 }
diff --git a/qt-ui/starwidget.h b/qt-ui/starwidget.h
index cdbb3ab5c..d92be5a98 100644
--- a/qt-ui/starwidget.h
+++ b/qt-ui/starwidget.h
@@ -3,39 +3,34 @@
 
 #include <QWidget>
 
+enum StarConfig {SPACING = 2, IMG_SIZE = 16, TOTALSTARS = 5};
 
 class StarWidget : public QWidget
 {
 	Q_OBJECT
 public:
 	explicit StarWidget(QWidget* parent = 0, Qt::WindowFlags f = 0);
-
-	int maxStars() const;
 	int currentStars() const;
-	bool halfStarsEnabled() const;
 
 	/*reimp*/ QSize sizeHint() const;
 
-	enum {SPACING = 2, IMG_SIZE = 16};
+	static QPixmap starActive();
+	static QPixmap starInactive();
 
 Q_SIGNALS:
 	void valueChanged(int stars);
 
 public Q_SLOTS:
 	void setCurrentStars(int value);
-	void setMaximumStars(int maximum);
-	void enableHalfStars(bool enabled);
 
 protected:
 	/*reimp*/ void mouseReleaseEvent(QMouseEvent* );
 	/*reimp*/ void paintEvent(QPaintEvent* );
 
 private:
-	int stars;
 	int current;
-	bool halfStar;
-	QPixmap activeStar;
-	QPixmap inactiveStar;
+	static QPixmap* activeStar;
+	static QPixmap* inactiveStar;
 	QPixmap grayImage(QPixmap *coloredImg);
 };