Add a class based on QGraphicsSimpleTextItem that handles animations.

This commit adds a class based on QGraphicsSimpleTextItem that
handls animations via animatedHide() animatedMoveTo() and a few
other QPropertyes. This is to be used in conjunction with the
DiveLineItem added in the past commit on the Coordinate Axis.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

2 files changed, 76 insertions, 0 deletions

diff --git a/qt-ui/profile/divetextitem.cpp b/qt-ui/profile/divetextitem.cpp
new file mode 100644
index 000000000..417f537c2
--- /dev/null
+++ b/qt-ui/profile/divetextitem.cpp
@@ -0,0 +1,54 @@
+#include "divetextitem.h"
+#include <QPropertyAnimation>
+
+DiveTextItem::DiveTextItem(QGraphicsItem* parent): QGraphicsSimpleTextItem(parent)
+{
+	setFlag(ItemIgnoresTransformations);
+}
+
+void DiveTextItem::setAlignment(int alignFlags)
+{
+	internalAlignFlags = alignFlags;
+	update();
+}
+
+void DiveTextItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
+{
+	/* This block of code corrects paints the Text on the
+	 * alignment choosed, but it created artifacts on the screen,
+	 * so I'm leaving this disabled for the time being.
+	 */
+// 	QRectF rect = boundingRect();
+// 	if (internalAlignFlags & Qt::AlignTop)
+// 		painter->translate(0, -rect.height());
+// // 	else if (internalAlignFlags & Qt::AlignBottom)
+// // 		painter->translate(0, rect.height()); this is the default, uneeded.
+// 	else if (internalAlignFlags & Qt::AlignVCenter)
+// 		painter->translate(0, -rect.height() / 2);
+//
+// // 	if (internalAlignFlags & Qt::AlignLeft )
+// // 		painter->translate(); // This is the default, uneeded.
+// 	if(internalAlignFlags & Qt::AlignHCenter)
+// 		painter->translate(-rect.width()/2, 0);
+// 	else if(internalAlignFlags & Qt::AlignRight)
+// 		painter->translate(-rect.width(), 0);
+
+	QGraphicsSimpleTextItem::paint(painter, option, widget);
+}
+
+void DiveTextItem::animatedHide()
+{
+	QPropertyAnimation *animation = new QPropertyAnimation(this, "opacity");
+	connect(animation, SIGNAL(finished()), SLOT(deleteLater()));
+	animation->setStartValue(1);
+	animation->setEndValue(0);
+	animation->start(QAbstractAnimation::DeleteWhenStopped);
+}
+
+void DiveTextItem::animateMoveTo(qreal x, qreal y)
+{
+	QPropertyAnimation *animation = new QPropertyAnimation(this, "pos");
+	animation->setStartValue(property("pos").toPointF());
+	animation->setEndValue(QPointF(x, y));
+	animation->start(QAbstractAnimation::DeleteWhenStopped);
+}
\ No newline at end of file
diff --git a/qt-ui/profile/divetextitem.h b/qt-ui/profile/divetextitem.h
new file mode 100644
index 000000000..b2e3fb61e
--- /dev/null
+++ b/qt-ui/profile/divetextitem.h
@@ -0,0 +1,22 @@
+#ifndef DIVETEXTITEM_H
+#define DIVETEXTITEM_H
+
+#include <QObject>
+#include <QGraphicsSimpleTextItem>
+
+/* A Line Item that has animated-properties. */
+class DiveTextItem :public QObject, public QGraphicsSimpleTextItem{
+	Q_OBJECT
+	Q_PROPERTY(QPointF pos READ pos WRITE setPos)
+	Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity)
+public:
+	DiveTextItem(QGraphicsItem* parent = 0);
+	virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget);
+	void setAlignment(int alignFlags);
+	void animatedHide();
+	void animateMoveTo(qreal x, qreal y);
+private:
+	int internalAlignFlags;
+};
+
+#endif