Gradient support part 2

Scatter gradients.

Task-number: QTRD-2200
Change-Id: Ia6ac271440d0d26b7cae9332ef2ba4e7bf1a11fe
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

3 files changed, 54 insertions, 0 deletions

diff --git a/tests/scattertest/main.cpp b/tests/scattertest/main.cpp
index 1ac661df..8da3898c 100644
--- a/tests/scattertest/main.cpp
+++ b/tests/scattertest/main.cpp
@@ -30,6 +30,8 @@
 #include <QLabel>
 #include <QScreen>
 #include <QFontDatabase>
+#include <QLinearGradient>
+#include <QPainter>
 
 int main(int argc, char **argv)
 {
@@ -101,6 +103,20 @@ int main(int argc, char **argv)
     QPushButton *startTimerButton = new QPushButton(widget);
     startTimerButton->setText(QStringLiteral("Start/stop timer"));
 
+    QLinearGradient grBtoY(0, 0, 100, 0);
+    grBtoY.setColorAt(1.0, Qt::black);
+    grBtoY.setColorAt(0.67, Qt::blue);
+    grBtoY.setColorAt(0.33, Qt::red);
+    grBtoY.setColorAt(0.0, Qt::yellow);
+    QPixmap pm(100, 24);
+    QPainter pmp(&pm);
+    pmp.setBrush(QBrush(grBtoY));
+    pmp.setPen(Qt::NoPen);
+    pmp.drawRect(0, 0, 100, 24);
+    QPushButton *gradientBtoYPB = new QPushButton(widget);
+    gradientBtoYPB->setIcon(QIcon(pm));
+    gradientBtoYPB->setIconSize(QSize(100, 24));
+
     QCheckBox *backgroundCheckBox = new QCheckBox(widget);
     backgroundCheckBox->setText(QStringLiteral("Show background"));
     backgroundCheckBox->setChecked(true);
@@ -143,6 +159,7 @@ int main(int argc, char **argv)
     vLayout->addWidget(removeBunchButton, 0, Qt::AlignTop);
     vLayout->addWidget(setSelectedItemButton, 0, Qt::AlignTop);
     vLayout->addWidget(startTimerButton, 0, Qt::AlignTop);
+    vLayout->addWidget(gradientBtoYPB, 0, Qt::AlignTop);
     vLayout->addWidget(backgroundCheckBox);
     vLayout->addWidget(gridCheckBox);
     vLayout->addWidget(new QLabel(QStringLiteral("Adjust shadow quality")));
@@ -187,6 +204,8 @@ int main(int argc, char **argv)
                      &ScatterDataModifier::selectItem);
     QObject::connect(startTimerButton, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::startStopTimer);
+    QObject::connect(gradientBtoYPB, &QPushButton::clicked, modifier,
+                     &ScatterDataModifier::setGradient);
     QObject::connect(themeButton, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::changeTheme);
     QObject::connect(labelButton, &QPushButton::clicked, modifier,
diff --git a/tests/scattertest/scatterchart.cpp b/tests/scattertest/scatterchart.cpp
index f276c5a8..ed188e68 100644
--- a/tests/scattertest/scatterchart.cpp
+++ b/tests/scattertest/scatterchart.cpp
@@ -328,6 +328,40 @@ void ScatterDataModifier::handleSelectionChange(int index)
     qDebug() << "Selected item index:" << index;
 }
 
+void ScatterDataModifier::setGradient()
+{
+    QLinearGradient barGradient(0, 0, 1, 100);
+    barGradient.setColorAt(1.0, Qt::lightGray);
+    barGradient.setColorAt(0.75001, Qt::lightGray);
+    barGradient.setColorAt(0.75, Qt::blue);
+    barGradient.setColorAt(0.50001, Qt::blue);
+    barGradient.setColorAt(0.50, Qt::red);
+    barGradient.setColorAt(0.25001, Qt::red);
+    barGradient.setColorAt(0.25, Qt::yellow);
+    barGradient.setColorAt(0.0, Qt::yellow);
+
+    QLinearGradient singleHighlightGradient(0, 0, 1, 100);
+    singleHighlightGradient.setColorAt(1.0, Qt::lightGray);
+    singleHighlightGradient.setColorAt(0.75, Qt::blue);
+    singleHighlightGradient.setColorAt(0.50, Qt::red);
+    singleHighlightGradient.setColorAt(0.25, Qt::yellow);
+    singleHighlightGradient.setColorAt(0.0, Qt::white);
+
+    m_chart->setItemColor(Qt::green);
+    m_chart->setSingleHighlightColor(Qt::white);
+
+    m_chart->setItemGradient(barGradient);
+    m_chart->setSingleHighlightGradient(singleHighlightGradient);
+
+    QDataVis::ColorStyle oldStyle = m_chart->colorStyle();
+    if (oldStyle == QDataVis::ColorStyleUniform)
+        m_chart->setColorStyle(QDataVis::ColorStyleObjectGradient);
+    else if (oldStyle == QDataVis::ColorStyleObjectGradient)
+        m_chart->setColorStyle(QDataVis::ColorStyleRangeGradient);
+    if (oldStyle == QDataVis::ColorStyleRangeGradient)
+        m_chart->setColorStyle(QDataVis::ColorStyleUniform);
+}
+
 void ScatterDataModifier::changeShadowQuality(int quality)
 {
     QDataVis::ShadowQuality sq = QDataVis::ShadowQuality(quality);
diff --git a/tests/scattertest/scatterchart.h b/tests/scattertest/scatterchart.h
index 2d97c236..db7f3ac0 100644
--- a/tests/scattertest/scatterchart.h
+++ b/tests/scattertest/scatterchart.h
@@ -62,6 +62,7 @@ public slots:
     void startStopTimer();
     void selectItem();
     void handleSelectionChange(int index);
+    void setGradient();
 
 signals:
     void shadowQualityChanged(int quality);