Progress indicators

CMakeLists.txt

@@ -24,6 +24,7 @@ include_directories(${Qt5Core_INCLUDE_DIRS} ${Qt5Gui_INCLUDE_DIRS} ${Qt5Widgets_
 
 set(SOURCES
  main.cpp
+ main.h
 
  CategorizedView.h
  CategorizedView.cpp

CategorizedProxyModel.cpp

@@ -8,8 +8,8 @@ CategorizedProxyModel::CategorizedProxyModel(QObject *parent)
 }
 bool CategorizedProxyModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
 {
-	const QString leftCategory = left.data(CategorizedView::CategoryRole).toString();
-	const QString rightCategory = right.data(CategorizedView::CategoryRole).toString();
+	const QString leftCategory = left.data(CategorizedViewRoles::CategoryRole).toString();
+	const QString rightCategory = right.data(CategorizedViewRoles::CategoryRole).toString();
 	if (leftCategory == rightCategory)
 	{
 		return left.row() < right.row();

CategorizedView.cpp

@@ -135,7 +135,7 @@ void CategorizedView::dataChanged(const QModelIndex &topLeft, const QModelIndex
 
 	QListView::dataChanged(topLeft, bottomRight, roles);
 
-	if (roles.contains(CategoryRole))
+	if (roles.contains(CategorizedViewRoles::CategoryRole) || roles.contains(Qt::DisplayRole))
 	{
 		updateGeometries();
 		update();
@@ -178,7 +178,7 @@ void CategorizedView::updateGeometries()
 
 	for (int i = 0; i < model()->rowCount(); ++i)
 	{
-		const QString category = model()->index(i, 0).data(CategoryRole).toString();
+		const QString category = model()->index(i, 0).data(CategorizedViewRoles::CategoryRole).toString();
 		if (!cats.contains(category))
 		{
 			Category *old = this->category(category);
@@ -238,7 +238,7 @@ bool CategorizedView::isIndexHidden(const QModelIndex &index) const
 
 CategorizedView::Category *CategorizedView::category(const QModelIndex &index) const
 {
-	return category(index.data(CategoryRole).toString());
+	return category(index.data(CategorizedViewRoles::CategoryRole).toString());
 }
 CategorizedView::Category *CategorizedView::category(const QString &cat) const
 {
@@ -274,7 +274,7 @@ QList<QModelIndex> CategorizedView::itemsForCategory(const CategorizedView::Cate
 		QList<QModelIndex> *indices = new QList<QModelIndex>();
 		for (int i = 0; i < model()->rowCount(); ++i)
 		{
-			if (model()->index(i, 0).data(CategoryRole).toString() == category->text)
+			if (model()->index(i, 0).data(CategorizedViewRoles::CategoryRole).toString() == category->text)
 			{
 				indices->append(model()->index(i, 0));
 			}
@@ -713,7 +713,7 @@ void CategorizedView::dropEvent(QDropEvent *event)
 	const QString categoryText = category->text;
 	if (model()->dropMimeData(event->mimeData(), Qt::MoveAction, row, 0, QModelIndex()))
 	{
-		model()->setData(model()->index(row, 0), categoryText, CategoryRole);
+		model()->setData(model()->index(row, 0), categoryText, CategorizedViewRoles::CategoryRole);
 		event->setDropAction(Qt::MoveAction);
 		event->accept();
 	}

CategorizedView.h

@@ -5,6 +5,16 @@
 #include <QLineEdit>
 #include <QCache>
 
+struct CategorizedViewRoles
+{
+	enum
+	{
+		CategoryRole = Qt::UserRole,
+		ProgressValueRole,
+		ProgressMaximumRole
+	};
+};
+
 class CategorizedView : public QListView
 {
 	Q_OBJECT
@@ -13,11 +23,6 @@ public:
 	CategorizedView(QWidget *parent = 0);
 	~CategorizedView();
 
-	enum
-	{
-		CategoryRole = Qt::UserRole
-	};
-
 	virtual QRect visualRect(const QModelIndex &index) const;
 	QModelIndex indexAt(const QPoint &point) const;
 	void setSelection(const QRect &rect, const QItemSelectionModel::SelectionFlags commands) override;

InstanceDelegate.cpp

@@ -20,6 +20,8 @@
 #include <QApplication>
 #include <QtCore/qmath.h>
 
+#include "CategorizedView.h"
+
 // Origin: Qt
 static void viewItemTextLayout(QTextLayout &textLayout, int lineWidth, qreal &height,
 							   qreal &widthUsed)
@@ -85,6 +87,26 @@ void drawFocusRect(QPainter *painter, const QStyleOptionViewItemV4 &option, cons
 	painter->setRenderHint(QPainter::Antialiasing);
 }
 
+// TODO this can be made a lot prettier
+void drawProgressOverlay(QPainter *painter, const QStyleOptionViewItemV4 &option, const int value, const int maximum)
+{
+	if (maximum == 0 || value == maximum)
+	{
+		return;
+	}
+
+	painter->save();
+
+	qreal percent = (qreal)value / (qreal)maximum;
+	QColor color = option.palette.color(QPalette::Dark);
+	color.setAlphaF(0.70f);
+	painter->setBrush(color);
+	painter->setPen(QPen(QBrush(), 0));
+	painter->drawPie(option.rect, 90 * 16, -percent * 360 * 60);
+
+	painter->restore();
+}
+
 static QSize viewItemTextSize(const QStyleOptionViewItemV4 *option)
 {
 	QStyle *style = option->widget ? option->widget->style() : QApplication::style();
@@ -229,6 +251,9 @@ void ListViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &opti
 		line.draw(painter, position);
 	}
 
+	drawProgressOverlay(painter, opt, index.data(CategorizedViewRoles::ProgressValueRole).toInt(),
+						index.data(CategorizedViewRoles::ProgressMaximumRole).toInt());
+
 	painter->restore();
 }
 

main.cpp

@@ -1,11 +1,16 @@
-#include "CategorizedView.h"
+#include "main.h"
+
 #include <QApplication>
 #include <QStandardItemModel>
 #include <QPainter>
+#include <QTime>
 
+#include "CategorizedView.h"
 #include "CategorizedProxyModel.h"
 #include "InstanceDelegate.h"
 
+Progresser *progresser;
+
 QPixmap icon(const Qt::GlobalColor color)
 {
 	QPixmap p = QPixmap(32, 32);
@@ -29,8 +34,9 @@ QStandardItem *createItem(const Qt::GlobalColor color, const QString &text, cons
 	QStandardItem *item = new QStandardItem;
 	item->setText(text);
 	item->setData(icon(color), Qt::DecorationRole);
-	item->setData(category, CategorizedView::CategoryRole);
+	item->setData(category, CategorizedViewRoles::CategoryRole);
 	item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
+	//progresser->addTrackedIndex(item);
 	return item;
 }
 QStandardItem *createItem(const int index, const QString &category)
@@ -38,8 +44,9 @@ QStandardItem *createItem(const int index, const QString &category)
 	QStandardItem *item = new QStandardItem;
 	item->setText(QString("Item #%1").arg(index));
 	item->setData(icon(index), Qt::DecorationRole);
-	item->setData(category, CategorizedView::CategoryRole);
+	item->setData(category, CategorizedViewRoles::CategoryRole);
 	item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
+	//progresser->addTrackedIndex(item);
 	return item;
 }
 
@@ -47,6 +54,10 @@ int main(int argc, char *argv[])
 {
 	QApplication a(argc, argv);
 
+	qsrand(QTime::currentTime().msec());
+
+	progresser = new Progresser();
+
 	QStandardItemModel model;
 	model.setRowCount(10);
 	model.setColumnCount(1);
@@ -62,7 +73,7 @@ int main(int argc, char *argv[])
 	model.setItem(7, createItem(Qt::white, "White", "Not Colorful"));
 
 	model.setItem(8, createItem(Qt::darkGreen, "Dark Green", ""));
-	model.setItem(9, createItem(Qt::green, "Green", ""));
+	model.setItem(9, progresser->addTrackedIndex(createItem(Qt::green, "Green", "")));
 
 	for (int i = 0; i < 20; ++i)
 	{

main.h

@@ -0,0 +1,53 @@
+#ifndef MAIN_H
+#define MAIN_H
+
+#include <QObject>
+#include <QTimer>
+#include <QList>
+#include <QStandardItem>
+#include <QDebug>
+
+#include "CategorizedView.h"
+
+class Progresser : public QObject
+{
+	Q_OBJECT
+public:
+	explicit Progresser(QObject *parent = 0) : QObject(parent)
+	{
+		QTimer *timer = new QTimer(this);
+		connect(timer, SIGNAL(timeout()), this, SLOT(timeout()));
+		timer->start(50);
+	}
+
+	QStandardItem *addTrackedIndex(QStandardItem *item)
+	{
+		item->setData(1000, CategorizedViewRoles::ProgressMaximumRole);
+		m_items.append(item);
+		return item;
+	}
+
+public slots:
+	void timeout()
+	{
+		foreach (QStandardItem *item, m_items)
+		{
+			int value = item->data(CategorizedViewRoles::ProgressValueRole).toInt();
+			value += qrand() % 3;
+			if (value >= item->data(CategorizedViewRoles::ProgressMaximumRole).toInt())
+			{
+				item->setData(item->data(CategorizedViewRoles::ProgressMaximumRole).toInt(),
+							  CategorizedViewRoles::ProgressValueRole);
+			}
+			else
+			{
+				item->setData(value, CategorizedViewRoles::ProgressValueRole);
+			}
+		}
+	}
+
+private:
+	QList<QStandardItem *> m_items;
+};
+
+#endif // MAIN_H