ChartDirector 6.0 (C++ Edition)

V-Bar Meter Orientation


      

This example demonstration various orientations for vertical bar meters.

In a vertical bar meter, the scale labels can be positioned on the left or right side of the meter scale. This is controlled by the last argument to LinearMeter.setMeter, which can be Left or Right. The color scale can also be position on the same or opposite side as the scale labels.

Source Code Listing

[The following code is available in "cppdemo/vbarmeterorientation". 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 = 74.25;

    // Bar colors of the meters
    int barColor[] = {0x2299ff, 0x00ee00, 0xaa66ee, 0xff7711};

    // Create a LinearMeter object of size 70 x 240 pixels with very light grey (0xeeeeee)
    // backgruond and a grey (0xaaaaaa) 3-pixel thick rounded frame
    LinearMeter *m = new LinearMeter(70, 240, 0xeeeeee, 0xaaaaaa);
    m->setRoundedFrame(Chart::Transparent);
    m->setThickFrame(3);

    // This example demonstrates putting the text labels at the left or right side of the meter
    // scale, and putting the color scale on the same side as the labels or on opposite side.
    int alignment[] = {Chart::Left, Chart::Left, Chart::Right, Chart::Right};
    int meterXPos[] = {28, 38, 12, 21};
    int labelGap[] = {2, 12, 10, 2};
    int colorScalePos[] = {53, 28, 36, 10};

    // Configure the position of the meter scale and which side to put the text labels
    m->setMeter(meterXPos[chartIndex], 18, 20, 205, alignment[chartIndex]);

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

    // To put the color scale on the same side as the text labels, we need to increase the gap
    // between the labels and the meter scale to make room for the color scale
    m->setLabelPos(false, labelGap[chartIndex]);

    // Add a smooth color scale to the meter
    double smoothColorScale[] = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100,
        0xff0000};
    m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
        smoothColorScale[0]))), colorScalePos[chartIndex], 6);

    // Add a bar from 0 to value with glass effect and 4 pixel rounded corners
    m->addBar(0, value, barColor[chartIndex], Chart::glassEffect(Chart::NormalGlare, Chart::Left), 4
        );

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

    //free up resources
    delete m;
}

int main(int argc, char *argv[])
{
    createChart(0, "vbarmeterorientation0.png");
    createChart(1, "vbarmeterorientation1.png");
    createChart(2, "vbarmeterorientation2.png");
    createChart(3, "vbarmeterorientation3.png");
    return 0;
}