ChartView

ChartView packs a whole charting toolkit into one self-contained Canvas subclass: 32 chart types, drawn in pure Objo code with no plugins, no dependencies and no native code. Copy the class into a project and you are done.

Everything from grouped, stacked and horizontal bars to Pareto charts, heatmaps, radar charts, candlesticks and Gantt charts on a real date axis. Every chart is styleable, clickable, and vector-sharp in print and PDF export.

Highlights

• 32 chart types, one class. Grouped, stacked, 100% and horizontal bars; plain, smooth, stacked and 100% lines and areas; combo charts with a second axis; Pareto with the 80% line; heatmaps; funnel and pyramid; scatter and bubble charts, with bubble area proportional to value; candlestick, HLOC and Gantt on a real date axis; radar; and pie, doughnut, polar and spiral charts in three flavours each.
• Made to be clicked. Tooltips follow the mouse and hit-testing is pixel-exact on every wedge. SeriesClicked reports the series and point the user picked, LabelClicked fires on category labels (rotated X-axis labels included), and ChartContextClick hands you the coordinates for context menus. Set RightClickOnChart = False to reserve right-clicks for labels alone, and ShowClickAreas = True draws every clickable area when you want to see them.
• Fully styleable. Colours, fonts and corners are yours to set, with legends, subtitles and axis titles built in, and number formats in German or English.
• Vector-sharp output. Printing and PDF export are true vector graphics: zoom in to 6400% and every line is still crisp.
• Easy to use. Set a kind, hand it labels and a series, add it to the window. That is the whole ceremony.

Using it in code

Var chart As New ChartView
chart.Kind = ChartView.KindPareto
chart.Title = "Support tickets by cause"
chart.SetLabels(["Setup", "Login", "Sync", "Export"])
chart.AddSeries("Tickets", [191, 132, 45, 12])
Self.Add(chart)

A Pareto chart sorts itself, totals the cumulative line and draws the 80% marker for you. The bundled demo project shows every chart type with its options.

Requirements

• No plugins, no dependencies, no native code: ChartView is a single pure Objo class you copy into your project.

Getting started

1. Download the archive and open the demo project in Objo Studio, or copy the ChartView class straight into your own project.
2. Create a chart in code: set Kind, call SetLabels and AddSeries, then add it to a window.
3. Browse the demo project to see all 32 chart types, the styling options and the click events in action.

Licence

ChartView is free for private, educational and non-commercial use. Commercial use requires an inexpensive licence from the author: send @madru a private message on the forum.

About

ChartView is written and maintained by @madru (Guido), who also built the Game Boy Core plugin, the Game Boy Emulator app, Minesweeper and Sokoban in this showcase.