//
// Draw track line with data labels
//
void ZoomScrollTrack2::trackLineLabel(XYChart *c, int mouseX)
{
// Clear the current dynamic layer and get the DrawArea object to draw on it.
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(0x000000, 0x0101));
// Draw a label on the x-axis to show the track line position.
ostringstream xlabel;
xlabel << "<*font,bgColor=000000*> " << c->xAxis()->getFormattedLabel(xValue, "mmm dd, yyyy")
<< " <*/font*>";
TTFText *t = d->text(xlabel.str().c_str(), "arialbd.ttf", 8);
// Restrict the x-pixel position of the label to make sure it stays inside the chart image.
int xLabelPos = max(0, min(xCoor - t->getWidth() / 2, c->getWidth() - t->getWidth()));
t->draw(xLabelPos, plotArea->getBottomY() + 6, 0xffffff);
t->destroy();
// Iterate through all layers to draw the data labels
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);
const char *dataSetName = dataSet->getDataName();
// Get the color, name and position of the data label
int color = dataSet->getDataColor();
int yCoor = c->getYCoor(dataSet->getPosition(xIndex), dataSet->getUseYAxis());
// Draw a track dot with a label next to it for visible data points in the plot area
if ((yCoor >= plotArea->getTopY()) && (yCoor <= plotArea->getBottomY()) && (color !=
(int)Chart::Transparent) && dataSetName && *dataSetName)
{
d->circle(xCoor, yCoor, 4, 4, color, color);
ostringstream label;
label << "<*font,bgColor=" << hex << color << "*> "
<< c->formatValue(dataSet->getValue(xIndex), "{value|P4}") << " <*font*>";
t = d->text(label.str().c_str(), "arialbd.ttf", 8);
// Draw the label on the right side of the dot if the mouse is on the left side the
// chart, and vice versa. This ensures the label will not go outside the chart image.
if (xCoor <= (plotArea->getLeftX() + plotArea->getRightX()) / 2)
t->draw(xCoor + 5, yCoor, 0xffffff, Chart::Left);
else
t->draw(xCoor - 5, yCoor, 0xffffff, Chart::Right);
t->destroy();
}
}
}
}
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;
}
//
// Draw track line with axis labels
//
void TrackAxis::trackLineAxis(XYChart *c, int mouseX)
{
// Clear the current dynamic layer and get the DrawArea object to draw on it.
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);
// The vertical track line is drawn up to the highest data point (the point with smallest
// y-coordinate). We need to iterate all datasets in all layers to determine where it is.
int minY = plotArea->getBottomY();
// Iterate through all layers to find the highest data point
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);
double dataPoint = dataSet->getPosition(xIndex);
if ((dataPoint != Chart::NoValue) && (dataSet->getDataColor() != (int)Chart::Transparent))
minY = min(minY, c->getYCoor(dataPoint, dataSet->getUseYAxis()));
}
}
// Draw a vertical track line at the x-position up to the highest data point.
d->vline(max(minY, plotArea->getTopY()), plotArea->getBottomY() + 6, xCoor, d->dashLineColor(
0x000000, 0x0101));
// Draw a label on the x-axis to show the track line position
ostringstream xlabel;
xlabel << "<*font,bgColor=000000*> " << c->xAxis()->getFormattedLabel(xValue, "mmm dd, yyyy")
<< " <*/font*>";
TTFText *t = d->text(xlabel.str().c_str(), "arialbd.ttf", 8);
t->draw(xCoor, plotArea->getBottomY() + 6, 0xffffff, Chart::Top);
t->destroy();
// 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);
// The positional value, axis binding, pixel coordinate and color of the data point.
double dataPoint = dataSet->getPosition(xIndex);
Axis *yAxis = dataSet->getUseYAxis();
int yCoor = c->getYCoor(dataPoint, yAxis);
int color = dataSet->getDataColor();
// Draw the axis label only for visible data points of named data sets
if ((dataPoint != Chart::NoValue) && (color != (int)Chart::Transparent) && (yCoor >=
plotArea->getTopY()) && (yCoor <= plotArea->getBottomY())) {
// The axis label consists of 3 parts - a track dot for the data point, an axis label,
// and a line joining the track dot to the axis label.
// Draw the line first. The end point of the line at the axis label side depends on
// whether the label is at the left or right side of the axis (that is, on whether the
// axis is on the left or right side of the plot area).
int xPos = yAxis->getX() + ((yAxis->getAlignment() == Chart::Left) ? -4 : 4);
d->hline(xCoor, xPos, yCoor, d->dashLineColor(color, 0x0101));
// Draw the track dot
d->circle(xCoor, yCoor, 4, 4, color, color);
// Draw the axis label. If the axis is on the left side of the plot area, the labels
// should right aligned to the axis, and vice versa.
ostringstream axisLabel;
axisLabel << "<*font,bgColor=" << hex << color << "*> "
<< c->formatValue(dataPoint, "{value|P4}") << " <*/font*>";
t = d->text(axisLabel.str().c_str(), "arialbd.ttf", 8);
t->draw(xPos, yCoor, 0xffffff,
((yAxis->getAlignment() == Chart::Left) ? Chart::Right : Chart::Left));
t->destroy();
}
}
}
}
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);
}
}
