圖表的背景是指圖表繪制的整個地區，由圖表邊框包圍。這篇教程將從四個方面教大家配置圖表的邊框和背景。

自定義圖表邊框

FusionCharts的2D圖表有一個默認的邊框，而3D圖表沒有，但你可以設置一個。2D圖表的自定義邊框如下：

下表是自定義圖表邊框的一些屬性及簡要說明：

使用這些屬性來自定義圖表邊界所需的數據結構如下：
JSON:

{
    "chart": {
        "caption": "Monthly Revenue",
        "subCaption": "Last year",
        "xAxisName": "Month",
        "yAxisName": "Amount (In USD)",
        "numberPrefix": "$",
        "showBorder": "1",
        "borderColor": "#666666",
        "borderThickness": "4",
        "borderAlpha": "80",
        "theme": "fint"
    },
    "data": [
        {
            "label": "Jan",
            "value": "420000"
        },
        {
            "label": "Feb",
            "value": "810000"
        },
        {
            "label": "Mar",
            "value": "720000"
        },
        {
            "label": "Apr",
            "value": "550000"
        },
        {
            "label": "May",
            "value": "910000"
        },
        {
            "label": "Jun",
            "value": "510000"
        },
        {
            "label": "Jul",
            "value": "680000"
        },
        {
            "label": "Aug",
            "value": "620000"
        },
        {
            "label": "Sep",
            "value": "610000"
        },
        {
            "label": "Oct",
            "value": "490000"
        },
        {
            "label": "Nov",
            "value": "900000"
        },
        {
            "label": "Dec",
            "value": "730000"
        }
    ]
}

XML:

<chart caption="Monthly Revenue" subcaption="Last year" xaxisname="Month" yaxisname="Amount (In USD)" numberprefix="$" showborder="1" bordercolor="#666666" borderthickness="4" borderalpha="80" theme="fint">
    < set label="Jan" value="420000" />
    < set label="Feb" value="810000" />
    < set label="Mar" value="720000" />
    < set label="Apr" value="550000" />
    < set label="May" value="910000" />
    < set label="Jun" value="510000" />
    < set label="Jul" value="680000" />
    < set label="Aug" value="620000" />
    < set label="Sep" value="610000" />
    < set label="Oct" value="490000" />
    < set label="Nov" value="900000" />
    < set label="Dec" value="730000" />
</chart>

自定義圖表背景

圖表的背景就是邊框里面的所有區域，2D圖表的自定義背景顏色如下圖所示：

下表是用于自定義圖表背景的屬性：

自定義圖表背景所需的數據結構如下：
JSON:

{
    "chart": {
        "caption": "Monthly Revenue",
        "subCaption": "Last year",
        "xAxisName": "Month",
        "yAxisName": "Amount (In USD)",
        "numberPrefix": "$",
        "canvasBgAlpha": "0",
        "bgColor": "#DDDDDD",
        "bgAlpha": "50",
        "theme": "fint"
    },
    "data": [
        {
            "label": "Jan",
            "value": "420000"
        },
        {
            "label": "Feb",
            "value": "810000"
        },
        {
            "label": "Mar",
            "value": "720000"
        },
        {
            "label": "Apr",
            "value": "550000"
        },
        {
            "label": "May",
            "value": "910000"
        },
        {
            "label": "Jun",
            "value": "510000"
        },
        {
            "label": "Jul",
            "value": "680000"
        },
        {
            "label": "Aug",
            "value": "620000"
        },
        {
            "label": "Sep",
            "value": "610000"
        },
        {
            "label": "Oct",
            "value": "490000"
        },
        {
            "label": "Nov",
            "value": "900000"
        },
        {
            "label": "Dec",
            "value": "730000"
        }
    ]
}

XML：

<chart caption="Monthly Revenue" subcaption="Last year" xaxisname="Month" yaxisname="Amount (In USD)" numberprefix="$" canvasbgalpha="0" bgcolor="#DDDDDD" bgalpha="50" theme="fint">
    < set label="Jan" value="420000" />
    < set label="Feb" value="810000" />
    < set label="Mar" value="720000" />
    < set label="Apr" value="550000" />
    < set label="May" value="910000" />
    < set label="Jun" value="510000" />
    < set label="Jul" value="680000" />
    < set label="Aug" value="620000" />
    < set label="Sep" value="610000" />
    < set label="Oct" value="490000" />
    < set label="Nov" value="900000" />
    < set label="Dec" value="730000" />
</chart>

使用漸變填充背景

當時用漸變來填充圖標背景時，你需要配置以下三個方面：

• 設置漸變透明度
• 設置顏色分布的比例
• 設置漸變的角度

2D圖表的漸變填充背景如下圖所示：

下表是自定義填充背景所需的屬性：

自定義漸變填充背景所需數據結構如下：
JSON:

{
    "chart": {
        "caption": "Monthly Revenue",
        "subCaption": "Last year",
        "xAxisName": "Month",
        "yAxisName": "Amount (In USD)",
        "numberPrefix": "$",
        "canvasBgAlpha": "0",
        "bgColor": "EEEEEE,CCCCCC",
        "bgratio": "60,40",
        "bgAlpha": "70,80",
        "theme": "fint"
    },
    "data": [
        {
            "label": "Jan",
            "value": "420000"
        },
        {
            "label": "Feb",
            "value": "810000"
        },
        {
            "label": "Mar",
            "value": "720000"
        },
        {
            "label": "Apr",
            "value": "550000"
        },
        {
            "label": "May",
            "value": "910000"
        },
        {
            "label": "Jun",
            "value": "510000"
        },
        {
            "label": "Jul",
            "value": "680000"
        },
        {
            "label": "Aug",
            "value": "620000"
        },
        {
            "label": "Sep",
            "value": "610000"
        },
        {
            "label": "Oct",
            "value": "490000"
        },
        {
            "label": "Nov",
            "value": "900000"
        },
        {
            "label": "Dec",
            "value": "730000"
        }
    ]
}

XML:

<chart caption="Monthly Revenue" subcaption="Last year" xaxisname="Month" yaxisname="Amount (In USD)" numberprefix="$" canvasbgalpha="0" bgcolor="EEEEEE,CCCCCC" bgratio="60,40" bgalpha="70,80" theme="fint">
    < set label="Jan" value="420000" />
    < set label="Feb" value="810000" />
    < set label="Mar" value="720000" />
    < set label="Apr" value="550000" />
    < set label="May" value="910000" />
    < set label="Jun" value="510000" />
    < set label="Jul" value="680000" />
    < set label="Aug" value="620000" />
    < set label="Sep" value="610000" />
    < set label="Oct" value="490000" />
    < set label="Nov" value="900000" />
    < set label="Dec" value="730000" />
</chart>

使用外部圖片填充背景

你也可以使用外部圖像（只能是GIF、JPEG或PNG）作為圖表的背景，如下圖所示：

使用外部圖像作為圖表背景涉及屬性如下表所示：

設置外部圖片作為圖表背景的數據結構如下：
JSON:

{
    "chart": {
        "caption": "Top 3 Juice Flavors by sales",
        "subCaption": "Last year",
        "xAxisName": "Flavor",
        "yAxisName": "Amount (In USD)",
        "numberPrefix": "$",
        "canvasBgAlpha": "0",
        "showAlternateHgridColor": "1",
        "bgImage": "//upload.wikimedia.org/wikipedia/commons/7/79/Misc_fruit.jpg",
        "bgImageAlpha": "40",
        "bgImageDisplayMode": "stretch",
        "theme": "fint"
    },
    "data": [
        {
            "label": "Apple",
            "value": "810000"
        },
        {
            "label": "Cranberry",
            "value": "620000"
        },
        {
            "label": "Grapes",
            "value": "350000"
        }
    ]
}

XML:

<chart caption="Top 3 Juice Flavors by sales" subcaption="Last year" xaxisname="Flavor" yaxisname="Amount (In USD)" numberprefix="$" canvasbgalpha="0" showalternatehgridcolor="1" bgimage="//upload.wikimedia.org/wikipedia/commons/7/79/Misc_fruit.jpg" bgimagealpha="40" bgimagedisplaymode="stretch" theme="fint">
    < set label="Apple" value="810000" />
    < set label="Cranberry" value="620000" />
    < set label="Grapes" value="350000" />
</chart>

自定義背景圖片

FusionCharts還允許你對圖表背景圖片進行自定義操作：

• 指定背景圖像的透明度
• 指定顯示模式
• 設置圖像的定位
• 設置圖像的規模

部分透明背景的2D圖表如下圖所示：

下表是自定義圖表背景圖像所需的屬性：

自定義背景圖片透明度的數據結構如下：
JSON:

{
    "chart": {
        "caption": "Top 3 Juice Flavors",
        "subCaption": "Last year",
        "xAxisName": "Flavor",
        "yAxisName": "Amount (In USD)",
        "numberPrefix": "$",
        "canvasBgAlpha": "0",
        "showAlternateHgridColor": "1",
        "bgImage": "//upload.wikimedia.org/wikipedia/commons/7/79/Misc_fruit.jpg",
        "bgImageAlpha": "25",
        "bgImageDisplayMode": "stretch",
        "theme": "fint"
    },
    "data": [
        {
            "label": "Apple",
            "value": "810000"
        },
        {
            "label": "Cranberry",
            "value": "620000"
        },
        {
            "label": "Grapes",
            "value": "350000"
        }
    ]
}

XML:

<chart caption="Top 3 Juice Flavors" subcaption="Last year" xaxisname="Flavor" yaxisname="Amount (In USD)" numberprefix="$" canvasbgalpha="0" showalternatehgridcolor="1" bgimage="//upload.wikimedia.org/wikipedia/commons/7/79/Misc_fruit.jpg" bgimagealpha="25" bgimagedisplaymode="stretch" theme="fint">
    < set label="Apple" value="810000" />
    < set label="Cranberry" value="620000" />
    < set label="Grapes" value="350000" />
</chart>

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