From 6258d5a835a0432931bafe035da644fa61e7f1e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Samuel=20R=C3=B8dal?= <sroedal@trolltech.com>
Date: Wed, 25 Jun 2008 19:51:38 +0200
Subject: Add statistics widget.

---
 model.h         |  4 ++++
 openglscene.cpp | 52 ++++++++++++++++++++++++++++++++++++----------------
 openglscene.h   |  3 +++
 3 files changed, 43 insertions(+), 16 deletions(-)

diff --git a/model.h b/model.h
index 545eedc..b1ef24e 100644
--- a/model.h
+++ b/model.h
@@ -15,6 +15,10 @@ public:
 
     void render(bool wireframe = false, bool normals = false) const;
 
+    int triangles() const { return m_pointIndices.size() / 3; }
+    int edges() const { return m_edgeIndices.size() / 2; }
+    int points() const { return m_points.size(); }
+
 private:
     QVector<Point3d> m_points;
     QVector<Point3d> m_normals;
diff --git a/openglscene.cpp b/openglscene.cpp
index 9210aaa..2a10c18 100644
--- a/openglscene.cpp
+++ b/openglscene.cpp
@@ -1,5 +1,4 @@
 #include "openglscene.h"
-
 #include "model.h"
 
 #include <QtGui>
@@ -22,9 +21,9 @@ OpenGLScene::OpenGLScene()
     , m_dir(QLatin1String("models"), QLatin1String("*.obj"), QDir::Size | QDir::Reversed, QDir::Files)
 {
     QWidget *controls = new QDialog(0, Qt::CustomizeWindowHint | Qt::WindowTitleHint);
-    QVBoxLayout *layout = new QVBoxLayout(controls);
+    QVBoxLayout *controlsLayout = new QVBoxLayout(controls);
 
-    layout->addWidget(new QLabel(tr("Model:")));
+    controlsLayout->addWidget(new QLabel(tr("Model:")));
 
     m_models = new QComboBox;
     connect(m_models, SIGNAL(currentIndexChanged(const QString &)), this, SLOT(loadModel(const QString &)));
@@ -32,40 +31,56 @@ OpenGLScene::OpenGLScene()
     connect(&m_modelLoader, SIGNAL(finished()), this, SLOT(modelLoaded()));
 #endif
     m_models->addItems(m_dir.entryList());
-    layout->addWidget(m_models);
+    controlsLayout->addWidget(m_models);
 
     QCheckBox *wireframe = new QCheckBox(tr("Render as wireframe"));
     connect(wireframe, SIGNAL(toggled(bool)), this, SLOT(enableWireframe(bool)));
-    layout->addWidget(wireframe);
+    controlsLayout->addWidget(wireframe);
 
     QCheckBox *normals = new QCheckBox(tr("Display normals vectors"));
     connect(normals, SIGNAL(toggled(bool)), this, SLOT(enableNormals(bool)));
-    layout->addWidget(normals);
+    controlsLayout->addWidget(normals);
 
-    layout->addWidget(new QLabel(tr("Light position:")));
+    controlsLayout->addWidget(new QLabel(tr("Light position:")));
     QSlider *lightPosition = new QSlider(Qt::Horizontal);
     lightPosition->setRange(-100, 100);
     connect(lightPosition, SIGNAL(valueChanged(int)), this, SLOT(setLightPosition(int)));
-    layout->addWidget(lightPosition);
+    controlsLayout->addWidget(lightPosition);
 
     QPushButton *colorButton = new QPushButton(tr("Choose model color"));
     connect(colorButton, SIGNAL(pressed()), this, SLOT(setModelColor()));
-    layout->addWidget(colorButton);
+    controlsLayout->addWidget(colorButton);
 
     QPushButton *backgroundButton = new QPushButton(tr("Choose background color"));
     connect(backgroundButton, SIGNAL(pressed()), this, SLOT(setBackgroundColor()));
-    layout->addWidget(backgroundButton);
+    controlsLayout->addWidget(backgroundButton);
 
     controls->setWindowOpacity(0.8);
     controls->setWindowTitle(tr("Controls"));
 
-    QGraphicsProxyWidget *item = addWidget(controls);
-    const QPointF offset = item->boundingRect().topLeft();
+    QGraphicsItem *controlsItem = addWidget(controls);
+    const QRectF rect = controlsItem->boundingRect();
+    controlsItem->translate(10 - rect.x(), 10 - rect.y());
+
+    QWidget *statistics = new QDialog(0, Qt::CustomizeWindowHint | Qt::WindowTitleHint);
+    QVBoxLayout *statisticsLayout = new QVBoxLayout(statistics);
+
+    for (int i = 0; i < 3; ++i) {
+        m_labels[i] = new QLabel;
+        statisticsLayout->addWidget(m_labels[i]);
+    }
+
+    statistics->setWindowOpacity(0.8);
+    statistics->setWindowTitle(tr("Model info"));
+    statistics->resize(controls->width(), 0);
 
-    item->translate(10, 10);
-    item->translate(-offset.x(), -offset.y());
-    item->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
-    item->setFlag(QGraphicsItem::ItemIsMovable);
+    QGraphicsItem *statisticsItem = addWidget(statistics);
+    statisticsItem->translate(10 - rect.x(), 20 + rect.height() - rect.y());
+
+    foreach (QGraphicsItem *item, items()) {
+        item->setFlag(QGraphicsItem::ItemIsMovable);
+        item->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
+    }
 
     m_time.start();
 }
@@ -144,6 +159,11 @@ void OpenGLScene::setModel(Model *model)
 {
     delete m_model;
     m_model = model;
+
+    m_labels[0]->setText(tr("Points: %0").arg(m_model->points()));
+    m_labels[1]->setText(tr("Edges: %0").arg(m_model->edges()));
+    m_labels[2]->setText(tr("Triangles: %0").arg(m_model->triangles()));
+
     update();
 }
 
diff --git a/openglscene.h b/openglscene.h
index 9b78ea0..6e041e1 100644
--- a/openglscene.h
+++ b/openglscene.h
@@ -13,6 +13,7 @@
 
 QT_BEGIN_NAMESPACE
 class QComboBox;
+class QLabel;
 QT_END_NAMESPACE
 
 class Model;
@@ -68,6 +69,8 @@ private:
 #endif
     QComboBox *m_models;
     QDir m_dir;
+
+    QLabel *m_labels[3];
 };
 
 #endif
-- 
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