Gradient to highlight series

Added a gradient to highlight series on textured surface example.

Change-Id: I2fc17dfa79f986cf5b651d964eb3bcf5d65f1c80
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/examples/datavisualization/texturesurface/main.cpp b/examples/datavisualization/texturesurface/main.cpp
index e73dc864..ed1a9be4 100644
--- a/examples/datavisualization/texturesurface/main.cpp
+++ b/examples/datavisualization/texturesurface/main.cpp
@@ -22,8 +22,11 @@
 #include <QtWidgets/QWidget>
 #include <QtWidgets/QHBoxLayout>
 #include <QtWidgets/QVBoxLayout>
+#include <QtWidgets/QGroupBox>
 #include <QtWidgets/QCheckBox>
+#include <QtWidgets/QLabel>
 #include <QtGui/QScreen>
+#include <QtGui/QPainter>
 
 int main(int argc, char **argv)
 {
@@ -49,7 +52,41 @@ int main(int argc, char **argv)
     QCheckBox *enableTexture = new QCheckBox(widget);
     enableTexture->setText(QStringLiteral("Surface texture"));
 
+    int height = 400;
+    int width = 100;
+    int border = 10;
+    QLinearGradient gr(0, 0, 1, height - 2 * border);
+    gr.setColorAt(1.0f, Qt::black);
+    gr.setColorAt(0.8f, Qt::darkGreen);
+    gr.setColorAt(0.6f, Qt::green);
+    gr.setColorAt(0.4f, Qt::yellow);
+    gr.setColorAt(0.2f, Qt::red);
+    gr.setColorAt(0.0f, Qt::darkRed);
+
+    QPixmap pm(width, height);
+    pm.fill(Qt::transparent);
+    QPainter pmp(&pm);
+    pmp.setBrush(QBrush(gr));
+    pmp.setPen(Qt::NoPen);
+    pmp.drawRect(border, border, 35, height - 2 * border);
+    pmp.setPen(Qt::black);
+    int step = (height - 2 * border) / 5;
+    for (int i = 0; i < 6; i++) {
+        int yPos = i * step + border;
+        pmp.drawLine(border, yPos, 55, yPos);
+        pmp.drawText(60, yPos + 2, QString("%1 m").arg(550 - (i * 110)));
+    }
+
+    QLabel *label = new QLabel(widget);
+    label->setPixmap(pm);
+
+    QGroupBox *heightMapGroupBox = new QGroupBox(QStringLiteral("Height color map"));
+    QVBoxLayout *colorMapVBox = new QVBoxLayout;
+    colorMapVBox->addWidget(label);
+    heightMapGroupBox->setLayout(colorMapVBox);
+
     vLayout->addWidget(enableTexture);
+    vLayout->addWidget(heightMapGroupBox);
 
     widget->show();