Gradient support Part 1

TODO:
 - Finish scatter
 - QML (maybe left until data set is sorted, though)

Change-Id: I87a8117cb29f147080e0662c55b1098cb2e71689
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

1 files changed, 51 insertions, 1 deletions

diff --git a/tests/barstest/chart.cpp b/tests/barstest/chart.cpp
index f150345e..3c82e400 100644
--- a/tests/barstest/chart.cpp
+++ b/tests/barstest/chart.cpp
@@ -40,7 +40,7 @@ GraphModifier::GraphModifier(Q3DBars *barchart)
       m_fontSize(20),
       m_segments(4),
       m_subSegments(3),
-      m_minval(-15.0),
+      m_minval(-16.0),
       m_maxval(20.0),
       m_selectedBar(-1, -1),
       m_autoAdjustingAxis(new Q3DValueAxis),
@@ -611,3 +611,53 @@ void GraphModifier::setMaxY(int max)
     m_fixedRangeAxis->setMax(max);
     m_maxval = max;
 }
+
+
+void GraphModifier::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::white);
+    singleHighlightGradient.setColorAt(0.75001, Qt::white);
+    singleHighlightGradient.setColorAt(0.75, Qt::lightGray);
+    singleHighlightGradient.setColorAt(0.50001, Qt::lightGray);
+    singleHighlightGradient.setColorAt(0.50, Qt::gray);
+    singleHighlightGradient.setColorAt(0.25001, Qt::gray);
+    singleHighlightGradient.setColorAt(0.25, Qt::darkGray);
+    singleHighlightGradient.setColorAt(0.0, Qt::darkGray);
+
+    QLinearGradient multiHighlightGradient(0, 0, 1, 100);
+    multiHighlightGradient.setColorAt(1.0, Qt::black);
+    multiHighlightGradient.setColorAt(0.75001, Qt::black);
+    multiHighlightGradient.setColorAt(0.75, Qt::darkBlue);
+    multiHighlightGradient.setColorAt(0.50001, Qt::darkBlue);
+    multiHighlightGradient.setColorAt(0.50, Qt::darkRed);
+    multiHighlightGradient.setColorAt(0.25001, Qt::darkRed);
+    multiHighlightGradient.setColorAt(0.25, Qt::darkYellow);
+    multiHighlightGradient.setColorAt(0.0, Qt::darkYellow);
+
+    m_chart->setBarColor(Qt::green);
+    m_chart->setSingleHighlightColor(Qt::white);
+    m_chart->setMultiHighlightColor(Qt::cyan);
+
+    m_chart->setBarGradient(barGradient);
+    m_chart->setSingleHighlightGradient(singleHighlightGradient);
+    m_chart->setMultiHighlightGradient(multiHighlightGradient);
+
+    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);
+}