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1 | 1 | #include "charttheme_p.h" |
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2 | 2 | #include "qchart.h" |
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3 | 3 | #include "qchartaxis.h" |
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4 | ||
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4 | #include <QTime> | |
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5 | 5 | |
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6 | 6 | //series |
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7 | 7 | #include "qbarset.h" |
| @@ -50,6 +50,8 ChartTheme::ChartTheme(QChart::ChartTheme id) | |||
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50 | 50 | m_seriesColor.append(QRgb(0xff707070)); |
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51 | 51 | m_gradientStartColor = QColor(QRgb(0xffffffff)); |
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52 | 52 | m_gradientEndColor = QColor(QRgb(0xffafafaf)); |
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53 | ||
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54 | qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); | |
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53 | 55 | } |
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54 | 56 | |
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55 | 57 | |
| @@ -188,31 +190,63 void ChartTheme::decorate(PiePresenter* item, QPieSeries* series, int /*count*/) | |||
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188 | 190 | QColor c = m_seriesColor[i++]; |
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189 | 191 | i = i % m_seriesColor.count(); |
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190 | 192 | |
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191 | // -1 means achromatic color -> cannot manipulate lightness | |
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192 | // TODO: find a better way to randomize lightness | |
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193 | if (c.toHsv().hue() == -1) | |
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194 | qWarning() << "ChartTheme::decorate() warning: achromatic theme color"; | |
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193 | // by default use the "raw" theme color | |
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194 | if (!colors.contains(c)) { | |
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195 | colors << c; | |
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196 | continue; | |
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197 | } | |
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198 | // ...ok we need to generate something that looks like the same color | |
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199 | // but different lightness | |
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200 | ||
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201 | int tryCount = 0; | |
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202 | while (tryCount++ < 100) { | |
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195 | 203 | |
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196 | // randomize lightness | |
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197 | qreal f = 50 + (qrand() % 100); // 50 is 50% darker, 100 is the same, 150 is 50% lighter | |
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198 | c = c.lighter(f); | |
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204 | // find maximum value we can raise the lightness | |
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205 | int lMax = 255; | |
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206 | if (lMax > 255 - c.red()) | |
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207 | lMax = 255 - c.red(); | |
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208 | if (lMax > 255 - c.green()) | |
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209 | lMax = 255 - c.green(); | |
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210 | if (lMax > 255 - c.blue()) | |
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211 | lMax = 255 - c.blue(); | |
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199 | 212 | |
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200 | // find duplicates | |
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201 | bool isUnique = true; | |
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202 | foreach (QColor color, colors) { | |
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203 |
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204 | isUnique = false; | |
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213 | // find maximum value we can make it darker | |
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214 | int dMax = 255; | |
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215 | if (dMax > c.red()) | |
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216 | dMax = c.red(); | |
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217 | if (dMax > c.green()) | |
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218 | dMax = c.green(); | |
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219 | if (dMax > c.blue()) | |
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220 | dMax = c.blue(); | |
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221 | ||
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222 | int max = dMax + lMax; | |
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223 | if (max == 0) { | |
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224 | // no room to make color lighter or darker... | |
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225 | qDebug() << "cannot generate a color for pie!"; | |
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226 | break; | |
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227 | } | |
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228 | ||
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229 | // generate random color | |
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230 | int r = c.red() - dMax; | |
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231 | int g = c.green() - dMax; | |
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232 | int b = c.blue() - dMax; | |
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233 | int d = qrand() % max; | |
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234 | c.setRgb(r+d, g+d, b+d); | |
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235 | ||
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236 | // found a unique color? | |
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237 | if (!colors.contains(c)) | |
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238 | break; | |
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205 | 239 | } |
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206 | 240 | |
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207 | // add to array if unique | |
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208 | //if (isUnique) | |
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209 | colors << c; | |
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241 | qDebug() << "generated a color for pie" << c; | |
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242 | colors << c; | |
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210 | 243 | } |
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211 | 244 | |
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212 | 245 | // finally update colors |
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213 | 246 | foreach (QPieSlice* s, series->slices()) { |
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214 | s->setPen(QPen(Qt::black)); // TODO: get from theme | |
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215 | s->setBrush(colors.takeFirst()); | |
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247 | QColor c = colors.takeFirst(); | |
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248 | s->setPen(c); | |
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249 | s->setBrush(c); | |
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216 | 250 | } |
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217 | 251 | } |
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218 | 252 | |
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