|
| 1 | +--- |
| 2 | +title: Rounded corners for Chart columns |
| 3 | +page_title: Rounded corners for Bar Chart columns |
| 4 | +description: "An example on how to apply rounded corners styling to {{ site.product }} Chart columns." |
| 5 | +type: how-to |
| 6 | +slug: chart-rounded-corners |
| 7 | +tags: progress, telerik, aspnet, mvc, core, chart, rounded, corners |
| 8 | +res_type: kb |
| 9 | +component: chart |
| 10 | +--- |
| 11 | + |
| 12 | +## Environment |
| 13 | + |
| 14 | +<table> |
| 15 | + <tr> |
| 16 | + <td>Product</td> |
| 17 | + <td>{{ site.product }} Chart</td> |
| 18 | + </tr> |
| 19 | +</table> |
| 20 | + |
| 21 | +## Description |
| 22 | + |
| 23 | +How can I change {{ site.product }} Chart columns to appear with rounded corners? |
| 24 | + |
| 25 | +## Solution |
| 26 | + |
| 27 | +You can achieve this requirement using the .Visual() capability offered by the component. Check the full implementation in this live REPL sample: |
| 28 | + |
| 29 | +[Chart Example: All Corners Rounded](https://netcorerepl.telerik.com/myPlcPlg30MY8AnT10) |
| 30 | + |
| 31 | +The result looks like this: |
| 32 | + |
| 33 | + |
| 34 | + |
| 35 | +```Razor |
| 36 | +<div class="demo-section wide"> |
| 37 | + @(Html.Kendo().Chart<Kendo.Mvc.Examples.Models.ElectricityProduction>() |
| 38 | + .Name("chart") |
| 39 | + .Title("Orders Status") |
| 40 | + .Legend(legend => legend |
| 41 | + .Position(ChartLegendPosition.Top) |
| 42 | + ) |
| 43 | + .SeriesDefaults(seriesDefaults => seriesDefaults |
| 44 | + .Column().Visual("columnVisual") |
| 45 | + .Highlight(highlight => highlight.Toggle("toggleHandler")) |
| 46 | + ) |
| 47 | + .Series(series => { |
| 48 | + series.Column(new double[] { 440000 }) |
| 49 | + .Name("Active").Color("#229954"); |
| 50 | + series.Column(new double[] { 180000 }) |
| 51 | + .Name("Delayed").Color("#CD5C5C"); |
| 52 | + series.Column(new double[] { 230000 }) |
| 53 | + .Name("Delivered").Color("#145a32"); |
| 54 | + }) |
| 55 | + .CategoryAxis(axis => axis |
| 56 | + .Labels(labels => labels.Rotation(-90)) |
| 57 | + .MajorGridLines(lines => lines.Visible(false)) |
| 58 | + ) |
| 59 | + .ValueAxis(axis => axis.Numeric() |
| 60 | + .Labels(labels => labels.Format("{0:N0}")) |
| 61 | + .MajorUnit(50000) |
| 62 | + .Line(line => line.Visible(false)) |
| 63 | + ) |
| 64 | + .Tooltip(tooltip => tooltip |
| 65 | + .Visible(true) |
| 66 | + .Format("{0:N0}") |
| 67 | + ) |
| 68 | + ) |
| 69 | +</div> |
| 70 | +<script> |
| 71 | + function columnVisual(e) { |
| 72 | + return createColumn(e.rect, e.options.color); |
| 73 | + } |
| 74 | +
|
| 75 | + function toggleHandler(e) { |
| 76 | + e.preventDefault(); |
| 77 | + var visual = e.visual; |
| 78 | + var opacity = e.show ? 0.8 : 1; |
| 79 | +
|
| 80 | + visual.opacity(opacity); |
| 81 | + } |
| 82 | +
|
| 83 | + function createLegendItem(e) { |
| 84 | + var drawing = kendo.drawing; |
| 85 | + var geometry = kendo.geometry; |
| 86 | +
|
| 87 | + var color = e.options.markers.background; |
| 88 | + var labelColor = e.options.labels.color; |
| 89 | + var rect = new geometry.Rect([0, 0], [120, 50]); |
| 90 | + var layout = new drawing.Layout(rect, { |
| 91 | + spacing: 5, |
| 92 | + alignItems: "center" |
| 93 | + }); |
| 94 | +
|
| 95 | + var overlay = drawing.Path.fromRect(rect, { |
| 96 | + fill: { |
| 97 | + color: "#fff", |
| 98 | + opacity: 0 |
| 99 | + }, |
| 100 | + stroke: { |
| 101 | + color: "none" |
| 102 | + }, |
| 103 | + cursor: "pointer" |
| 104 | + }); |
| 105 | +
|
| 106 | + var column = createColumn(new geometry.Rect([0, 0], [15, 10]), color); |
| 107 | + var label = new drawing.Text(e.series.name, [0, 0], { |
| 108 | + fill: { |
| 109 | + color: labelColor |
| 110 | + } |
| 111 | + }) |
| 112 | +
|
| 113 | + layout.append(column, label); |
| 114 | + layout.reflow(); |
| 115 | +
|
| 116 | + var group = new drawing.Group().append(layout, overlay); |
| 117 | +
|
| 118 | + return group; |
| 119 | + } |
| 120 | +
|
| 121 | + function createColumn(rect, color) { |
| 122 | + var drawing = kendo.drawing; |
| 123 | + var geometry = kendo.geometry; |
| 124 | +
|
| 125 | + var gradient = new drawing.LinearGradient({ |
| 126 | + stops: [{ |
| 127 | + offset: 0, |
| 128 | + color: color |
| 129 | + }, { |
| 130 | + offset: 0.5, |
| 131 | + color: color, |
| 132 | + opacity: 0.9 |
| 133 | + }, { |
| 134 | + offset: 0.5, |
| 135 | + color: color, |
| 136 | + opacity: 0.9 |
| 137 | + }, { |
| 138 | + offset: 1, |
| 139 | + color: color |
| 140 | + }] |
| 141 | + }); |
| 142 | +
|
| 143 | + var cornerRadius = 10; |
| 144 | + var roundedRect = new geometry.Rect(rect.origin, rect.size, cornerRadius); |
| 145 | + var column = new drawing.Rect(roundedRect, { |
| 146 | + fill: gradient, |
| 147 | + stroke: { |
| 148 | + color: "none" |
| 149 | + } |
| 150 | + }); |
| 151 | +
|
| 152 | + return column; |
| 153 | + } |
| 154 | +</script> |
| 155 | +``` |
| 156 | + |
| 157 | +It is also possible to have only the top corners rounded: |
| 158 | + |
| 159 | +[Chart Example: Top Corners Rounded](https://netcorerepl.telerik.com/woPPcpOm0806bKQP47) |
| 160 | + |
| 161 | +Here is the result: |
| 162 | + |
| 163 | + |
| 164 | + |
| 165 | +```Razor |
| 166 | +<div class="demo-section wide"> |
| 167 | + @(Html.Kendo().Chart<Kendo.Mvc.Examples.Models.ElectricityProduction>() |
| 168 | + .Name("chart") |
| 169 | + .Title("Orders Status") |
| 170 | + .SeriesDefaults(seriesDefaults => seriesDefaults |
| 171 | + .Column().Visual("columnVisual") |
| 172 | + .Highlight(highlight => highlight.Toggle("toggleHandler")) |
| 173 | + ) |
| 174 | + .Series(series => { |
| 175 | + series.Column(new double[] { 440000 }) |
| 176 | + .Name("Active").Color("#229954"); |
| 177 | + series.Column(new double[] { 180000 }) |
| 178 | + .Name("Delayed").Color("#CD5C5C"); |
| 179 | + series.Column(new double[] { 230000 }) |
| 180 | + .Name("Delivered").Color("#145a32"); |
| 181 | + }) |
| 182 | + .CategoryAxis(axis => axis |
| 183 | + .Labels(labels => labels.Rotation(-90)) |
| 184 | + .MajorGridLines(lines => lines.Visible(false)) |
| 185 | + ) |
| 186 | + .ValueAxis(axis => axis.Numeric() |
| 187 | + .Labels(labels => labels.Format("{0:N0}")) |
| 188 | + .MajorUnit(50000) |
| 189 | + .Line(line => line.Visible(false)) |
| 190 | + ) |
| 191 | + .Tooltip(tooltip => tooltip |
| 192 | + .Visible(true) |
| 193 | + .Format("{0:N0}") |
| 194 | + ) |
| 195 | + ) |
| 196 | +</div> |
| 197 | +<script> |
| 198 | + function columnVisual(e) { |
| 199 | + return createColumn(e.rect, e.options.color); |
| 200 | + } |
| 201 | +
|
| 202 | + function toggleHandler(e) { |
| 203 | + e.preventDefault(); |
| 204 | + var visual = e.visual; |
| 205 | + var opacity = e.show ? 0.8 : 1; |
| 206 | +
|
| 207 | + visual.opacity(opacity); |
| 208 | + } |
| 209 | +
|
| 210 | + function createLegendItem(e) { |
| 211 | + var drawing = kendo.drawing; |
| 212 | + var geometry = kendo.geometry; |
| 213 | +
|
| 214 | + var color = e.options.markers.background; |
| 215 | + var labelColor = e.options.labels.color; |
| 216 | + var rect = new geometry.Rect([0, 0], [120, 50]); |
| 217 | + var layout = new drawing.Layout(rect, { |
| 218 | + spacing: 5, |
| 219 | + alignItems: "center" |
| 220 | + }); |
| 221 | +
|
| 222 | + var overlay = drawing.Path.fromRect(rect, { |
| 223 | + fill: { |
| 224 | + color: "#fff", |
| 225 | + opacity: 0 |
| 226 | + }, |
| 227 | + stroke: { |
| 228 | + color: "none" |
| 229 | + }, |
| 230 | + cursor: "pointer" |
| 231 | + }); |
| 232 | +
|
| 233 | + var column = createColumn(new geometry.Rect([0, 0], [15, 10]), color); |
| 234 | + var label = new drawing.Text(e.series.name, [0, 0], { |
| 235 | + fill: { |
| 236 | + color: labelColor |
| 237 | + } |
| 238 | + }) |
| 239 | +
|
| 240 | + layout.append(column, label); |
| 241 | + layout.reflow(); |
| 242 | +
|
| 243 | + var group = new drawing.Group().append(layout, overlay); |
| 244 | +
|
| 245 | + return group; |
| 246 | + } |
| 247 | +
|
| 248 | + function createColumn(rect, color) { |
| 249 | + var drawing = kendo.drawing; |
| 250 | + var geometry = kendo.geometry; |
| 251 | +
|
| 252 | + var gradient = new drawing.LinearGradient({ |
| 253 | + stops: [{ |
| 254 | + offset: 0, |
| 255 | + color: color |
| 256 | + }, { |
| 257 | + offset: 0.5, |
| 258 | + color: color, |
| 259 | + opacity: 0.9 |
| 260 | + }, { |
| 261 | + offset: 0.5, |
| 262 | + color: color, |
| 263 | + opacity: 0.9 |
| 264 | + }, { |
| 265 | + offset: 1, |
| 266 | + color: color |
| 267 | + }] |
| 268 | + }); |
| 269 | +
|
| 270 | + var cornerRadius = 10; |
| 271 | + var roundedRect = new geometry.Rect(rect.origin, rect.size, cornerRadius); |
| 272 | + var column = new drawing.Rect(roundedRect, { |
| 273 | + fill: gradient, |
| 274 | + stroke: { |
| 275 | + color: "none" |
| 276 | + } |
| 277 | + }); |
| 278 | +
|
| 279 | + var baseOrigin = [rect.origin.x, rect.origin.y + rect.size.height - cornerRadius]; |
| 280 | + var baseSize = [rect.size.width, cornerRadius]; |
| 281 | + var baseRect = new geometry.Rect(baseOrigin, baseSize); |
| 282 | + var squareBase = new drawing.Rect(rect, { |
| 283 | + fill: gradient, |
| 284 | + stroke: { |
| 285 | + color: "none" |
| 286 | + }, |
| 287 | + clip: drawing.Path.fromRect(baseRect) |
| 288 | + }); |
| 289 | +
|
| 290 | + var group = new drawing.Group(); |
| 291 | + group.append(column, squareBase) |
| 292 | + return group; |
| 293 | + } |
| 294 | +</script> |
| 295 | +``` |
| 296 | + |
| 297 | +## See Also |
| 298 | + |
| 299 | +* [Telerik UI for {{ site.framework }} Knowledge Base](https://docs.telerik.com/{{ site.platform }}/knowledge-base) |
0 commit comments