WIP charts2 frame parts

chart_empty_state.go

@@ -0,0 +1,32 @@
+package mujica
+
+import (
+	"github.com/egoist/mygo/ui"
+)
+
+// ChartEmptyStateOptions configure a ChartEmptyState.
+type ChartEmptyStateOptions struct {
+	// Height keeps the chart's size; 0 means 240.
+	Height float32
+	// Error describes a DataFailed status; empty uses the built-in text.
+	Error string
+	// Empty replaces the built-in "No data" text.
+	Empty string
+}
+
+// ChartEmptyState holds a chart's place while it loads, fails or has no data; Changed reports Retry.
+func ChartEmptyState(c *ui.Context, status DataStatus, opts ChartEmptyStateOptions) ChoiceResult {
+	if opts.Height < 0 {
+		panic("mujica: ChartEmptyState Height must be ≥ 0")
+	}
+	h := opts.Height
+	if h == 0 {
+		h = 240
+	}
+	var res ChoiceResult
+	res.Element = ui.Column(c).Height(h).FillWidth().MinWidth(0)
+	res.Element.Children(func() {
+		res.changed = dataPlaceholder(c, status, opts.Error, opts.Empty, msg(c, "chart.empty")) && !res.Element.IsDisabled()
+	})
+	return res
+}