int main(int argc, char *argv[]) { // The data for the area chart double data[] = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56, 48, 52, 65, 62}; // The labels for the area chart const char *labels[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"}; // Create a XYChart object of size 600 x 360 pixels, with a brushed silver // background, 1 pixel 3D border effect, rounded corners and soft drop shadow. XYChart *c = new XYChart(600, 360, Chart::brushedSilverColor(), Chart::Transparent, 1); c->setRoundedFrame(); c->setDropShadow(); // Add a title box to the chart using 18 pts Times Bold Italic font. TextBox *title = c->addTitle( "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance " "Enhancer <*img=star.png*><*img=star.png*><*/*>", "timesbi.ttf", 18); // // Use a text box with a depressed 3D border to create the inner depressed region // // The width of the frame border int frameWidth = 5; // Set the depressed region position TextBox *contentBox = c->addText(frameWidth, title->getHeight(), ""); contentBox->setSize(c->getDrawArea()->getWidth() - 1 - frameWidth * 2, c->getDrawArea()->getHeight() - title->getHeight() - frameWidth - 1); // Use -1 as the rasied effect to create a depressed region contentBox->setBackground(Chart::Transparent, Chart::Transparent, -1); // Set rounded corners, and put the text box at the back of the chart contentBox->setRoundedCorners(10); contentBox->setZOrder(Chart::ChartBackZ); // Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25 // pixels under the top depressed edge. Set the width to 75 pixels less than the // depressed region width, and the height to 75 pixels less than the depressed // region height. Use white (ffffff) background, transparent border, and grey // (cccccc) horizontal and vertical grid lines. PlotArea *plotArea = c->setPlotArea(50 + contentBox->getLeftX(), contentBox->getTopY() + 25, contentBox->getWidth() - 75, contentBox->getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1); // Add a title to the y axis c->yAxis()->setTitle("Energy Concentration (KJ per liter)"); // Set the labels on the x axis. c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0]))); // Display 1 out of 3 labels on the x-axis. c->xAxis()->setLabelStep(3); // Add a title to the x axis using CDML c->xAxis()->setTitle( "<*block,valign=absmiddle*><*img=clock.png*> Elapsed Time (hour)<*/*>"); // Set the axes width to 2 pixels c->xAxis()->setWidth(2); c->yAxis()->setWidth(2); // Add an area layer to the chart using a gradient color that changes vertically // from semi-transparent red (60ff0000) to semi-transparent white (60ffffff) c->addAreaLayer(DoubleArray(data, sizeof(data)/sizeof(data[0])), c->linearGradientColor(0, contentBox->getTopY() + 20, 0, contentBox->getTopY( ) + contentBox->getHeight() - 50, 0x60ff0000, 0x60ffffff)); // Adjust the plot area size, such that the bounding box (inclusive of axes) is // 15 pixels from the left depressed edge, 25 pixels below the top depressed // edge, 25 pixels from the right depressed edge, and 15 pixels above the bottom // depressed edge. c->packPlotArea(contentBox->getLeftX() + 15, contentBox->getTopY() + 25, contentBox->getLeftX() + contentBox->getWidth() - 25, contentBox->getTopY() + contentBox->getHeight() - 15); // Add a custom CDML text with the bottom right corner is anchored to the bootom // right corner of the plot area, with 5 pixels margin. c->addText(plotArea->getLeftX() + plotArea->getWidth() - 5, plotArea->getTopY() + plotArea->getHeight() - 5, "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>" "<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>" )->setAlignment(Chart::BottomRight); // Output the chart c->makeChart("enhancedarea.jpg"); //free up resources delete c; return 0; }
void GraphWidget::trackLineLegend(XYChart *c, int mouseX) { //清空值 nameList.clear(); valueList.clear(); colorList.clear(); DrawArea *d = c->initDynamicLayer(); // The plot area object PlotArea *plotArea = c->getPlotArea(); // Get the data x-value that is nearest to the mouse, and find its pixel coordinate. double xValue = c->getNearestXValue(mouseX); int xCoor = c->getXCoor(xValue); // Draw a vertical track line at the x-position d->vline(plotArea->getTopY(), plotArea->getBottomY(), xCoor, d->dashLineColor(0xffffff, 0x0101)); // Container to hold the legend entries vector<string> legendEntries; // Iterate through all layers to build the legend array for (int i = 0; i < c->getLayerCount(); ++i) { Layer *layer = c->getLayerByZ(i); // The data array index of the x-value int xIndex = layer->getXIndexOf(xValue); // Iterate through all the data sets in the layer for (int j = 0; j < layer->getDataSetCount(); ++j) { DataSet *dataSet = layer->getDataSetByZ(j); // We are only interested in visible data sets with names const char *dataName = dataSet->getDataName(); //添加类别信息 nameList << QString::fromUtf8(dataName); //添加颜色信息 colorList << dataSet->getDataColor(); int color = dataSet->getDataColor(); if (dataName && *dataName && (color != (int)Chart::Transparent)) { // Build the legend entry, consist of the legend icon, name and data value. double dataValue = dataSet->getValue(xIndex); //添加值信息 if(dataValue == Chart::NoValue){ bool isFind = false; for(int temp_i = xValue - 1;temp_i >= 0;temp_i--){ int index = layer->getXIndexOf(temp_i); if(index != -1){ isFind = true; double value = dataSet->getValue(index); valueList << QString::fromUtf8(c->formatValue(value, "{value|P4}")); break; } } if(!isFind){ valueList << "N/A"; } }else{ valueList << QString::fromUtf8(c->formatValue(dataValue, "{value|P4}")); } ostringstream legendEntry; legendEntry << "<*block*><*font=msyhbd.ttf*>" << dataSet->getLegendIcon() << " " << dataName << ": " << ((dataValue == Chart::NoValue) ? "N/A" : c->formatValue(dataValue, "{value|P4}")) << "<*/*>"; legendEntries.push_back(legendEntry.str()); // Draw a track dot for data points within the plot area int yCoor = c->getYCoor(dataSet->getPosition(xIndex), dataSet->getUseYAxis()); if ((yCoor >= plotArea->getTopY()) && (yCoor <= plotArea->getBottomY())) { d->circle(xCoor, yCoor, 4, 4, color, color); } } } } //添加值信息 valueList << QString::fromUtf8(c->xAxis()->getFormattedLabel(getXValue((int)xValue), "yyyy-mm-dd hh:nn")); // Create the legend by joining the legend entries ostringstream legendText; legendText << "<*block,maxWidth=" << plotArea->getWidth() << "*><*block*><*font=arialbd.ttf*>[" << c->xAxis()->getFormattedLabel(getXValue((int)xValue), "yyyy-mm-dd hh:nn") << "]<*/*>"; for (int i = ((int)legendEntries.size()) - 1; i >= 0; --i) legendText << " " << legendEntries[i]; // Display the legend on the top of the plot area TTFText *t = d->text(legendText.str().c_str(), "arial.ttf", 8); t->draw(plotArea->getLeftX() + 5, plotArea->getTopY() - 3, 0xC8C8C8, Chart::BottomLeft); t->destroy(); //y轴显示值 if(!isValueHide){ trackLineAxis(c, d, mouseX); } }