Restructure examples folder (#47)

Split examples into separate markdown files, each containing a description, sample code, and a screenshot of the resulting xlsx document.

The script `generate.rb` is provided to actually generate the example documents by executing the sample code contained in the markdown files.

1 files changed, 30 insertions, 0 deletions

diff --git a/examples/chart_colors_example.md b/examples/chart_colors_example.md
new file mode 100644
index 00000000..f017025c
--- /dev/null
+++ b/examples/chart_colors_example.md
@@ -0,0 +1,30 @@
+## Description
+
+You could change the colors of the charts with providing a list of colors. You don't need to provide color for all data.
+
+## Code
+
+```ruby
+require 'axlsx'
+
+p = Axlsx::Package.new
+wb = p.workbook
+
+wb.add_worksheet(name: 'Bar Chart') do |sheet|
+  sheet.add_row ['A Simple Bar Chart']
+
+  sheet.add_row ['A', 3]
+  sheet.add_row ['B', 10]
+  sheet.add_row ['C', 7]
+
+  sheet.add_chart(Axlsx::Bar3DChart, start_at: 'A6', end_at: 'F20') do |chart|
+    chart.add_series data: sheet['B2:B4'], labels: sheet['A2:A4'], title: sheet['A1'], colors: ['FF0000', '00FF00']
+  end
+end
+
+p.serialize 'chart_colors_example.xlsx'
+```
+
+## Output
+
+![Output](images/chart_colors_example.png "Output")