API to query custom item selection

Task-number: QTRD-3046

+ Added missing elementSelected signal to QML

Change-Id: I5e79d8e910d2730e3d2ae5550ce576f01aac0b18
Change-Id: I5e79d8e910d2730e3d2ae5550ce576f01aac0b18
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>

3 files changed, 47 insertions, 4 deletions

diff --git a/examples/datavisualization/customitems/customitemgraph.cpp b/examples/datavisualization/customitems/customitemgraph.cpp
index c2479a9a..0a757e7d 100644
--- a/examples/datavisualization/customitems/customitemgraph.cpp
+++ b/examples/datavisualization/customitems/customitemgraph.cpp
@@ -24,8 +24,9 @@
 
 using namespace QtDataVisualization;
 
-CustomItemGraph::CustomItemGraph(Q3DSurface *surface)
-    : m_graph(surface)
+CustomItemGraph::CustomItemGraph(Q3DSurface *surface, QLabel *label)
+    : m_graph(surface),
+      m_textField(label)
 {
     QImage layerOneHMap(":/maps/layer_1.png");
     QHeightMapSurfaceDataProxy *layerOneProxy = new QHeightMapSurfaceDataProxy(layerOneHMap);
@@ -87,6 +88,9 @@ CustomItemGraph::CustomItemGraph(Q3DSurface *surface)
     m_graph->seriesList().at(2)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);
 
     m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);
+
+    connect(m_graph, &QAbstract3DGraph::elementSelected,
+            this, &CustomItemGraph::handleElementSelected);
 }
 
 CustomItemGraph::~CustomItemGraph()
@@ -189,3 +193,24 @@ void CustomItemGraph::toggleShadows(bool shadows)
     else
         m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityNone);
 }
+
+void CustomItemGraph::handleElementSelected(QAbstract3DGraph::ElementType type)
+{
+    if (type == QAbstract3DGraph::ElementCustomItem) {
+        int index = m_graph->selectedCustomItemIndex();
+        QCustom3DItem *item = m_graph->selectedCustomItem();
+        QString text;
+        text.setNum(index);
+        text.append(": ");
+        QStringList split = item->meshFile().split("/");
+        text.append(split.last());
+        m_textField->setText(text);
+    } else if (type == QAbstract3DGraph::ElementSeries) {
+        m_textField->setText("Surface");
+    } else if (type > QAbstract3DGraph::ElementSeries
+               && type < QAbstract3DGraph::ElementCustomItem) {
+        m_textField->setText("Axis");
+    } else {
+        m_textField->setText("Nothing");
+    }
+}
diff --git a/examples/datavisualization/customitems/customitemgraph.h b/examples/datavisualization/customitems/customitemgraph.h
index a13e8620..aee32c62 100644
--- a/examples/datavisualization/customitems/customitemgraph.h
+++ b/examples/datavisualization/customitems/customitemgraph.h
@@ -24,6 +24,7 @@
 #include <QtDataVisualization/QHeightMapSurfaceDataProxy>
 #include <QtDataVisualization/QSurface3DSeries>
 #include <QtWidgets/QSlider>
+#include <QtWidgets/QLabel>
 
 using namespace QtDataVisualization;
 
@@ -31,7 +32,7 @@ class CustomItemGraph : public QObject
 {
     Q_OBJECT
 public:
-    explicit CustomItemGraph(Q3DSurface *surface);
+    explicit CustomItemGraph(Q3DSurface *surface, QLabel *label);
     ~CustomItemGraph();
 
     void toggleItemOne(bool show);
@@ -42,7 +43,11 @@ public:
     void toggleShadows(bool shadows);
 
 private:
+    void handleElementSelected(QAbstract3DGraph::ElementType type);
+
+private:
     Q3DSurface *m_graph;
+    QLabel *m_textField;
 };
 
 #endif
diff --git a/examples/datavisualization/customitems/main.cpp b/examples/datavisualization/customitems/main.cpp
index a37cc76f..fe2d0edc 100644
--- a/examples/datavisualization/customitems/main.cpp
+++ b/examples/datavisualization/customitems/main.cpp
@@ -65,10 +65,12 @@ int main(int argc, char **argv)
     vLayoutLeft->addWidget(checkboxThree);
 
     QLabel *label2 = new QLabel("Visuals:");
+    font.setBold(true);
     label2->setFont(font);
     vLayoutRight->addWidget(label2);
 
     QCheckBox *checkboxOneRight = new QCheckBox("See-Through");
+    font.setBold(false);
     checkboxOneRight->setFont(font);
     vLayoutRight->addWidget(checkboxOneRight);
 
@@ -81,11 +83,22 @@ int main(int argc, char **argv)
     checkboxThreeRight->setChecked(true);
     vLayoutRight->addWidget(checkboxThreeRight);
 
+    QLabel *label3 = new QLabel("Selection:");
+    font.setBold(true);
+    label3->setFont(font);
+    vLayoutRight->addWidget(label3);
+
+    QLabel *label4 = new QLabel("Nothing");
+    font.setBold(false);
+    font.setPointSize(12);
+    label4->setFont(font);
+    vLayoutRight->addWidget(label4);
+
     widget->setWindowTitle(QStringLiteral("Custom Items Example"));
 
     widget->show();
 
-    CustomItemGraph *modifier = new CustomItemGraph(graph);
+    CustomItemGraph *modifier = new CustomItemGraph(graph, label4);
 
     QObject::connect(checkboxOne, &QCheckBox::stateChanged,
                      modifier, &CustomItemGraph::toggleItemOne);