| @@ -28,4 +28,18 qreal PlotDomain::spanY() const | |||
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28 | 28 | return m_maxY - m_minY; |
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29 | 29 | } |
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30 | 30 | |
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31 | PlotDomain PlotDomain::subDomain(const QRect& rect, qreal maxWidth,qreal maxHeight) const | |
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32 | { | |
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33 | PlotDomain domain; | |
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34 | ||
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35 | qreal dx = spanX() / maxWidth; | |
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36 | qreal dy = spanY() / maxHeight; | |
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37 | ||
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38 | domain.m_minX = m_minX + dx * rect.left(); | |
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39 | domain.m_maxX = m_minX + dx * rect.right(); | |
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40 | domain.m_minY = m_maxY - dy * rect.bottom(); | |
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41 | domain.m_maxY = m_maxY - dy * rect.top(); | |
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42 | ||
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43 | return domain; | |
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44 | } | |
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31 | 45 | QTCOMMERCIALCHART_END_NAMESPACE |
| @@ -13,6 +13,9 public: | |||
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13 | 13 | qreal spanX() const; |
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14 | 14 | qreal spanY() const; |
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15 | 15 | |
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16 | PlotDomain subDomain(const QRect& rect, qreal maxWidth, qreal maxHeight) const; | |
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17 | ||
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18 | ||
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16 | 19 | public: |
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17 | 20 | qreal m_minX; |
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18 | 21 | qreal m_maxX; |
| @@ -269,18 +269,11 void QChart::zoomInToRect(const QRect& rectangle) | |||
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269 | 269 | rect.translate(-margin, -margin); |
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270 | 270 | |
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271 | 271 | PlotDomain& oldDomain = m_plotDomainList[m_plotDataIndex]; |
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272 | PlotDomain newDomain; | |
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273 | 272 | |
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274 |
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275 | qreal dy = oldDomain.spanY() / (m_rect.height() - 2 * margin); | |
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276 | ||
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277 | newDomain.m_minX = oldDomain.m_minX + dx * rect.left(); | |
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278 | newDomain.m_maxX = oldDomain.m_minX + dx * rect.right(); | |
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279 | newDomain.m_minY = oldDomain.m_maxY - dy * rect.bottom(); | |
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280 | newDomain.m_maxY = oldDomain.m_maxY - dy * rect.top(); | |
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273 | PlotDomain domain = oldDomain.subDomain(rect,m_rect.width() - 2 * margin,m_rect.height() - 2 * margin); | |
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281 | 274 | |
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282 | 275 | m_plotDomainList.resize(m_plotDataIndex + 1); |
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283 |
m_plotDomainList<< |
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276 | m_plotDomainList<<domain; | |
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284 | 277 | m_plotDataIndex++; |
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285 | 278 | |
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286 | 279 | foreach (ChartItem* item ,m_chartItems) |
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