| @@ -167,8 +167,8 QT_CHARTS_BEGIN_NAMESPACE | |||
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167 | 167 | hardware and drivers. |
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168 | 168 | \li Polar charts do not support accelerated series. |
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169 | 169 | \li Mouse events are not supported for accelerated series. |
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170 | \li Enabling chart drop shadow is not recommended when using accelerated series, | |
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171 | as that can slow the frame rate down significantly. | |
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170 | \li Enabling chart drop shadow or using transparent chart background color is not recommended | |
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171 | when using accelerated series, as that can slow the frame rate down significantly. | |
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172 | 172 | \endlist |
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173 | 173 | |
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174 | 174 | These additional restrictions stem from the fact that the accelerated series is drawn on a |
| @@ -223,8 +223,8 QT_CHARTS_BEGIN_NAMESPACE | |||
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223 | 223 | hardware and drivers. |
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224 | 224 | \li Polar charts do not support accelerated series. |
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225 | 225 | \li Mouse events are not supported for accelerated series. |
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226 | \li Enabling chart drop shadow is not recommended when using accelerated series, | |
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227 | as that can slow the frame rate down significantly. | |
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226 | \li Enabling chart drop shadow or using transparent chart background color is not recommended | |
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227 | when using accelerated series, as that can slow the frame rate down significantly. | |
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228 | 228 | \endlist |
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229 | 229 | |
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230 | 230 | The default value is \c{false}. |
| @@ -334,6 +334,7 void DeclarativeChart::initChart(QChart::ChartType type) | |||
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334 | 334 | { |
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335 | 335 | m_sceneImage = 0; |
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336 | 336 | m_sceneImageDirty = false; |
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337 | m_sceneImageNeedsClear = false; | |
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337 | 338 | m_guiThreadId = QThread::currentThreadId(); |
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338 | 339 | m_paintThreadId = 0; |
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339 | 340 | m_updatePending = false; |
| @@ -590,9 +591,15 void DeclarativeChart::renderScene() | |||
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590 | 591 | if (!m_sceneImage || chartSize != m_sceneImage->size()) { |
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591 | 592 | delete m_sceneImage; |
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592 | 593 | m_sceneImage = new QImage(chartSize, QImage::Format_ARGB32); |
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593 |
m_sceneImage |
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594 | m_sceneImageNeedsClear = true; | |
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594 | 595 | } |
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595 | 596 | |
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597 | if (m_sceneImageNeedsClear) { | |
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598 | m_sceneImage->fill(Qt::transparent); | |
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599 | // Don't clear the flag if chart background has any transparent element to it | |
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600 | if (m_chart->backgroundBrush().color().alpha() == 0xff && !m_chart->isDropShadowEnabled()) | |
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601 | m_sceneImageNeedsClear = false; | |
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602 | } | |
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596 | 603 | QPainter painter(m_sceneImage); |
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597 | 604 | if (antialiasing()) { |
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598 | 605 | painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing |
| @@ -822,6 +829,8 void DeclarativeChart::setBackgroundColor(QColor color) | |||
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822 | 829 | { |
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823 | 830 | QBrush b = m_chart->backgroundBrush(); |
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824 | 831 | if (b.style() != Qt::SolidPattern || color != b.color()) { |
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832 | if (color.alpha() < 0xff) | |
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833 | m_sceneImageNeedsClear = true; | |
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825 | 834 | b.setStyle(Qt::SolidPattern); |
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826 | 835 | b.setColor(color); |
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827 | 836 | m_chart->setBackgroundBrush(b); |
| @@ -885,6 +894,7 int DeclarativeChart::count() | |||
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885 | 894 | void DeclarativeChart::setDropShadowEnabled(bool enabled) |
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886 | 895 | { |
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887 | 896 | if (enabled != m_chart->isDropShadowEnabled()) { |
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897 | m_sceneImageNeedsClear = true; | |
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888 | 898 | m_chart->setDropShadowEnabled(enabled); |
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889 | 899 | dropShadowEnabledChanged(enabled); |
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890 | 900 | } |
| @@ -903,6 +913,7 qreal DeclarativeChart::backgroundRoundness() const | |||
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903 | 913 | void DeclarativeChart::setBackgroundRoundness(qreal diameter) |
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904 | 914 | { |
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905 | 915 | if (m_chart->backgroundRoundness() != diameter) { |
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916 | m_sceneImageNeedsClear = true; | |
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906 | 917 | m_chart->setBackgroundRoundness(diameter); |
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907 | 918 | emit backgroundRoundnessChanged(diameter); |
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908 | 919 | } |
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