Customize Style

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Switching Bwteen Themes

ZK Charts provides many predefined color themes for use.

Here are a list of the themes that you can choose from:

• Default Theme

1     chart.setTheme(Theme.DEFAULT);

• Grid Theme

1     chart.setTheme(Theme.GRID);

• Skies Theme

1     chart.setTheme(Theme.SKIES);

• Gray Theme

1     chart.setTheme(Theme.GRAY);

• Dark Blue Theme

1     chart.setTheme(Theme.DARK_BLUE);

• Dark Green Theme

1     chart.setTheme(Theme.DARK_GREEN);

Customizing Colors

ZK Charts use Color class to apply the color to the color-changing method in the option, such as setBackgroundColor() or setFillColor(). Color supports solid color and gradient color.

Solid Color

Solid color can be specified as an RGB triplet, in hexadecimal format or any valid color format in browsers:

• RGB triplet - rgb(186,86,150)
• Hexadecimal format - #58BA7A

Gradient Color

Gradient is a smooth color transition from one color to another. In ZK Charts, gradient could be defined by LinearGradient or RadialGradient, they have the similar attributes of SVG.

Linear Gradient

Linear gradient contains attributes x1, y2, x2 and y2 to define the start and end position of the gradient. It can be assigned like below:

    // Create a linear gradient which x1=0, y1=0, x2 = 0, y2=1 with percentages represent values
    LinearGradient linearGradient2 = new LinearGradient(0, 0, 0, 1);

    // Create a linear gradient which x1=0, y1=0, x2 = 0, y2=300 with coordinate
    LinearGradient linearGradient2 = new LinearGradient(0, 0, 0, 300);

The stop attributes can be assigned as below:

   // Same as lineraGradient.addStop(0, "#EEEEEE"); lineraGradient.addStop(1, "#CCCCCC");
    lineraGradient.setStop("#EEEEEE", "#CCCCCC");

Radial Gradient

Radial gradient is similar to linear gradient, the difference is that radial gradient specifies the attributes define the outermost circle:

  // cx=0.4, cy=0.3, cr=0.6
  RadialGradient radialGradient = new RadialGradient(0.4, 0.3, 0.6);
  radialGradient.setStops("#EEEEEE", "#CCCCCC");

References

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