ChartDirector 6.0 (C++ Edition)

White Vertical Linear Meters


          

This example demonstrates vertical bar meters in a white coloring scheme.

Source Code Listing

[The following code is available in "cppdemo/whitevlinearmeter". A MFC version of the code is available in "mfcdemo/mfcdemo" (Windows edition only). A QT version of the code is available in "qtdemo/qtdemo".]
#include "chartdir.h"

void createChart(int chartIndex, const char *filename)
{
    // The value to display on the meter
    double value = 75.35;

    // Create a LinearMeter object of size 250 x 75 pixels with very light grey (0xeeeeee)
    // backgruond and a light grey (0xccccccc) 3-pixel thick rounded frame
    LinearMeter *m = new LinearMeter(70, 260, 0xeeeeee, 0xcccccc);
    m->setRoundedFrame(Chart::Transparent);
    m->setThickFrame(3);

    // Set the scale region top-left corner at (28, 30), with size of 20 x 196 pixels. The scale
    // labels are located on the left (default - implies vertical meter)
    m->setMeter(28, 30, 20, 196);

    // Set meter scale from 0 - 100, with a tick every 10 units
    m->setScale(0, 100, 10);

    // Demostrate different types of color scales and putting them at different positions
    double smoothColorScale[] = {0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100,
        0xff0000};
    double stepColorScale[] = {0, 0x33ff33, 50, 0xffff33, 80, 0xff3333, 100};
    double highLowColorScale[] = {0, 0x6666ff, 70, Chart::Transparent, 100, 0xff0000};

    if (chartIndex == 0) {
        // Add the smooth color scale at the default position
        m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
            smoothColorScale[0]))));
    } else if (chartIndex == 1) {
        // Add the step color scale at the default position
        m->addColorScale(DoubleArray(stepColorScale, (int)(sizeof(stepColorScale) / sizeof(
            stepColorScale[0]))));
    } else if (chartIndex == 2) {
        // Add the high low scale at the default position
        m->addColorScale(DoubleArray(highLowColorScale, (int)(sizeof(highLowColorScale) / sizeof(
            highLowColorScale[0]))));
    } else if (chartIndex == 3) {
        // Add the smooth color scale starting at x = 28 (left of scale) with zero width and ending
        // at x = 28 with 20 pixels width
        m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
            smoothColorScale[0]))), 28, 0, 28, 20);
    } else if (chartIndex == 4) {
        // Add the smooth color scale starting at x = 38 (center of scale) with zero width and
        // ending at x = 28 with 20 pixels width
        m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
            smoothColorScale[0]))), 38, 0, 28, 20);
    } else {
        // Add the smooth color scale starting at x = 48 (right of scale) with zero width and ending
        // at x = 28 with 20 pixels width
        m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
            smoothColorScale[0]))), 48, 0, 28, 20);
    }

    // In this demo, we demostrate pointers of different shapes
    if (chartIndex < 3) {
        // Add a blue (0x0000cc) pointer of default shape at the specified value
        m->addPointer(value, 0x0000cc);
    } else {
        // Add a blue (0x0000cc) pointer of triangular shape the specified value
        m->addPointer(value, 0x0000cc)->setShape(Chart::TriangularPointer, 0.7, 0.5);
    }

    // Add a title using 8pt Arial Bold font with a border color background
    m->addTitle("Temp C", "arialbd.ttf", 8, Chart::TextColor)->setBackground(0xcccccc);

    // Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold
    // font on a black (0x000000) background with rounded border.
    TextBox *t = m->addText(m->getWidth() / 2, m->getHeight() - 8, m->formatValue(value, "2"),
        "arialbd.ttf", 8, 0xffffff, Chart::Bottom);
    t->setBackground(0x000000);
    t->setRoundedCorners(3);
    t->setMargin(5, 5, 2, 1);

    // Output the chart
    m->makeChart(filename);

    //free up resources
    delete m;
}

int main(int argc, char *argv[])
{
    createChart(0, "whitevlinearmeter0.png");
    createChart(1, "whitevlinearmeter1.png");
    createChart(2, "whitevlinearmeter2.png");
    createChart(3, "whitevlinearmeter3.png");
    createChart(4, "whitevlinearmeter4.png");
    createChart(5, "whitevlinearmeter5.png");
    return 0;
}