ChartDirector 6.0 (C++ Edition)

Black Vertical Bar Meters


          

This example demonstrates vertical bar meters in a black coloring scheme, and with bars in various shading styles.

Source Code Listing

[The following code is available in "cppdemo/blackvbarmeter". 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 = 66.77;

    // Create a LinearMeter object of size 70 x 260 pixels with black background and rounded corners
    LinearMeter *m = new LinearMeter(70, 260, 0x000000);
    m->setRoundedFrame(Chart::Transparent);

    // Set the default text and line colors to white (0xffffff)
    m->setColor(Chart::TextColor, 0xffffff);
    m->setColor(Chart::LineColor, 0xffffff);

    // Set the scale region top-left corner at (36, 30), with size of 20 x 196 pixels. The scale
    // labels are located on the left (default - implies vertical meter).
    m->setMeter(36, 30, 20, 196);

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

    // Add the chart title at the top center
    TextBox *title = m->addText(m->getWidth() / 2, 5, "Temp C", "arialbd.ttf", 8, Chart::TextColor,
        Chart::TopCenter);

    // Move the scale labels 8 pixels from the meter scale to make room for the color scale
    m->setLabelPos(false, 8);

    // Demostrate different types of color scales
    double smoothColorScale[] = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100,
        0xff0000};
    double stepColorScale[] = {0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100};
    double highLowColorScale[] = {0, 0x0000ff, 40, Chart::Transparent, 60, Chart::Transparent, 100,
        0xff0000};
    double highColorScale[] = {70, Chart::Transparent, 100, 0xff0000};

    if (chartIndex == 0) {
        // Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
        m->addBar(0, value, 0x0088ff, Chart::glassEffect(Chart::NormalGlare, Chart::Left), 4);
        // Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
        m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
            smoothColorScale[0]))), 29, 4);
    } else if (chartIndex == 1) {
         // Add a yellow (0xCC9922) bar from 0 to value with bar lighting effect
        m->addBar(0, value, 0xcc9922, Chart::barLighting());
        // Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
        m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
            smoothColorScale[0]))), 29, 4);

        // Set the title style to black text on a yellow (0xcc9922) background with rounded corners
        title->setFontColor(0x000000);
        title->setBackground(0xcc9922);
        title->setRoundedCorners(2);
    } else if (chartIndex == 2) {
         // Add a grey (0xaaaaaa) bar from 0 to value with bar lighting effect
        m->addBar(0, value, 0xaaaaaa, Chart::barLighting());
        // Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
        m->addColorScale(DoubleArray(highLowColorScale, (int)(sizeof(highLowColorScale) / sizeof(
            highLowColorScale[0]))), 29, 4);
    } else if (chartIndex == 3) {
         // Add a brown (0xbb6622) bar from 0 to value with cylinder lighting effect
        m->addBar(0, value, 0xbb6622, Chart::cylinderEffect());
        // Add a 4 pixel thick brown (0xbb6622) frame
        m->setThickFrame(4, 0xbb6622);
        // Add a high only color scale at x = 29 (left of meter scale)
        m->addColorScale(DoubleArray(highColorScale, (int)(sizeof(highColorScale) / sizeof(
            highColorScale[0]))), 29, 4);
    } else if (chartIndex == 4) {
        // Add a purple (0x7755ee) bar from 0 to value
        m->addBar(0, value, 0x7755ee);
        // Add a 4 pixel thick purple (0x880088) frame
        m->setThickFrame(4, 0x880088);
        // Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
        m->addColorScale(DoubleArray(highLowColorScale, (int)(sizeof(highLowColorScale) / sizeof(
            highLowColorScale[0]))), 29, 4);
    } else {
         // Add a green (0x00bb00) bar from 0 to value with soft lighting effect and 4 pixel rounded
         // corners
        m->addBar(0, value, 0x00bb00, Chart::softLighting(), 4);
        // Add a 4-pixel step color scale at x = 29 (left of meter scale)
        m->addColorScale(DoubleArray(stepColorScale, (int)(sizeof(stepColorScale) / sizeof(
            stepColorScale[0]))), 29, 4);
    }

    // Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold
    // font on a black (0x000000) background with depressed grey (0x333333) rounded border.
    TextBox *t = m->addText(m->getWidth() / 2, m->getHeight() - 7, m->formatValue(value, "2"),
        "arialbd.ttf", 8, 0xffffff, Chart::BottomCenter);
    t->setBackground(0x000000, 0x333333, -1);
    t->setRoundedCorners(3);

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

    //free up resources
    delete m;
}

int main(int argc, char *argv[])
{
    createChart(0, "blackvbarmeter0.png");
    createChart(1, "blackvbarmeter1.png");
    createChart(2, "blackvbarmeter2.png");
    createChart(3, "blackvbarmeter3.png");
    createChart(4, "blackvbarmeter4.png");
    createChart(5, "blackvbarmeter5.png");
    return 0;
}