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       
(Showing Draft Content)

Pattern Fill and Gradient Fill

You can enhance cell appearance in a spreadsheet by applying pattern or gradient effects to the cells.


This feature helps users to add emphasis to cells in the SpreadJS worksheet. It also empowers users to add simple patterns to the cells that contain text, when using the black and white printers, such that the text remains readable.

Pattern Fill

You can apply a pattern fill effect on a cell by using the BackColor property of the Style object. You can specify the pattern style, cell background color, and pattern color for the pattern fill effect.




The following code sample applies the pattern fill effect on a range of cells in the worksheet.

$(document).ready(function () {
    // initializing Spread
    var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), { sheetCount: 1 });

    // get the activesheet
    var activeSheet = spread.getSheet(0);

    // set the style for the cells with pattern fill
    for (i = 1; i < 19; i++) {
        var pat = { type: i, backgroundColor: "blue", patternColor: "red" };
        style = new GC.Spread.Sheets.Style();
        style.backColor = pat;
        activeSheet.setStyle(i, 1, style)
}


Gradient Fill

Gradient fill creates a blend of different colors. You can apply a gradient fill effect on a cell by using the BackColor property of the Style object. Using this property, you can either specify the gradient path fill style or gradient fill style for the cells.




The following code sample applies the gradient fill effect on a range of cells in the worksheet.

$(document).ready(function () {
    // initializing Spread
    var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), { sheetCount: 1 });

    // get the activesheet
    var activeSheet = spread.getSheet(0);

    // set the style for the cell with gradient fill
    var gra = { degree: 315, stops: [{ position: 0, color: "red" }, { position: 0.5, color: "white" }, { position: 1, color: "blue" },] };
    style = new GC.Spread.Sheets.Style();
    style.backColor = gra;
    activeSheet.setStyle(1, 1, style);

    // set the style for the cell with gradient path fill
    var gra2 = { type: "path", left: 0.4, top: 0.4, right: 0.6, bottom: 0.6, stops: [{ position: 0, color: "black" }, { position: 0.5, color: "blue" }, { position: 1, color: "white" },] },
    style = new GC.Spread.Sheets.Style();
    style.backColor = gra2;
    activeSheet.setStyle(1, 3, style)
}


Use Case Scenario

For example, let's say you are working on data that covers the area-wise population in Italian cities. Here, we can use the pattern fill and gradient fill effects to add emphasis to the cells. We can highlight the header data, that is, the "City", "Population" and "Area" using the gradient path fill style. The Population data above-average value is highlighted using the gradient fill style and the area data below average value is highlighted using the pattern fill style.


Refer to the following image that uses pattern fill and gradient fill effects on the cells.




The following code sample adds pattern fill and gradient fill effects to the cells in the spreadsheet.

$(document).ready(function () {
    // initializing Spread
    var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), { sheetCount: 1 });

    // get the activesheet
    var activeSheet = spread.getSheet(0);

    // create data
    var data = [
        ["City", "Population", "Area"],
        ['Rome', 2761477, 1285.31],
        ['Milan', 1324110, 181.76],
        ['Naples', 959574, 117.27],
        ['Turin', 907563, 130.17],
        ['Palermo', 655875, 158.9],
        ['Genoa', 607906, 243.60],
        ['Bologna', 380181, 140.7],
        ['Florence', 371282, 102.41],
        ['Fiumicino', 67370, 213.44],
        ['Anzio', 52192, 43.43],
        ['Ciampino', 1323261, 11]
    ];

    // set data
    activeSheet.setArray(1, 1, data);

    // set column width
    activeSheet.setColumnWidth(1, 110);
    activeSheet.setColumnWidth(2, 110);
    activeSheet.setColumnWidth(3, 110);  

    // set the gradient path fill style for headers of data
    var gra2 = { type: "path", left: 0.4, top: 0.4, right: 0.6, bottom: 0.6, stops: [{ position: 0, color: "lightblue" }, { position: 0.5, color: "yellow" }, { position: 1, color: "white" },] },
    style = new GC.Spread.Sheets.Style();
    style.hAlign = GC.Spread.Sheets.HorizontalAlign.center;
    style.backColor = gra2;
    for (var i = 1; i < 4; i++) {
        activeSheet.setStyle(1, i, style)
    }

    // set the gradient fill style for 'Population' above average
    var gra = { degree: 315, stops: [{ position: 0, color: "red" }, { position: 0.5, color: "white" }, { position: 1, color: "blue" },] };
    var style = new GC.Spread.Sheets.Style();
    style.backColor = gra;
    activeSheet.conditionalFormats.addAverageRule(GC.Spread.Sheets.ConditionalFormatting.AverageConditionType.above, style, [new GC.Spread.Sheets.Range(2, 2, 11, 1)]);

    // set the pattern fill style  for 'Area' below average
    var pat = { type: 8, backgroundColor: "lightblue", patternColor: "pink" };
    style = new GC.Spread.Sheets.Style();
    style.backColor = pat;
    activeSheet.conditionalFormats.addAverageRule(GC.Spread.Sheets.ConditionalFormatting.AverageConditionType.below, style, [new GC.Spread.Sheets.Range(2, 3, 11, 1)]);
});