financial_chart

2026-02-23

• fix hitTestMode property issue #69.
• fix chart layout initialization issue #70.
• fix GPointViewPort issue #71.
• fix GValueViewPortAutoScaleStrategyMinMax issue #72.
• SDK version up.

2025-11-08

• Add GGraphBar.basePosition property to allow customize base position of bar graph.
• Add new graph type GGraphStackedBar for stacked bar graph.
• Update workshop demo.
• Minor bug fix.

2025-10-25

• Add **Notifier getters to properties of GComponent to allow listen updates.

2025-10-15

• fix scaling issue of GValueViewPort with logarithmic scale when panning.

2025-10-11

• add more markers.
  • GArrowLineMarker - arrow line with customizable arrow heads at start and end.
  • GStatsLineMarker - statistical line marker that extends GArrowLineMarker with value statistics.
  • GCrosslineMarker - crossline marker for marking horizontal and vertical lines.
  • GCalloutMarker - callout/annotation marker with pointer.
  • GFibRetracementMarker - Fibonacci retracement marker.
  • GFibCircleMarker - Fibonacci circle marker.
  • GFibArcMarker - Fibonacci arc marker.
  • GFibResistanceFanMarker - Fibonacci resistance fan marker.
  • GFibTimeZoneMarker - Fibonacci timezone marker.
• [breaking change] deprecate GArrowMarker in favor of GArrowLineMarker.
• update workshop demo to include new markers.

2025-09-18

• SDK version up.
• add GValueViewPort.scaleType to support logarithmic price scale.
• add GSvgMarker overlay marker.
• add screenshot.
• minor fix.

2025-07-26

• add documentation link.

2025-06-30

• add GPanel.onSecondaryTapGraphArea callback.
• add selected, locked, label properties to GComponent and rename highlight to highlighted.
• add GGraph.clearMarkers, hitTestOverlayMarkers methods.
• rename GGraph.drawHighlightMarks method to drawGraphHighlightMarks.
• add GPanel.hitTestGraphs method.
• add GHitTestMode.auto enum value.
• add GCoordinate.copyByPosition method.
• add GSize.copyFromViewSize method.
• add GPositionCoordinate.xIsInverted, yIsInverted property.
• add GChart.printDebugPaintCount property.
• change return value of GChart.hitTestPanelGraphsmethod.
• refactor overlay markers.
  • add hitTest logic for overlay markers.
  • draw control handles for GOverlayMarker.
  • [breaking change] rename class GLineMarker to GPolyLineMarker.
  • [breaking change] change GArcMarker.close property to closeType.
  • add scaleHandler property to GOverlayMarker.
  • add controlHandleThemes property to GOverlayMarkerTheme and remove controlPointsStyle.
• update workshop demo to add Markers tab.

2025-05-27

• skip rendering of double.nan and double.infinite values for area and line graphs.
• skip rendering of resizing splitters when scaling the viewport.
• fix candlestick graph rendering issue when open and close values are very close.

2025-05-25

• fix wrong rendering for some edge cases of area graph.
• fix graph highlight markers being drawn outside of the graph area issue.
• fix animation error after disposed.
• add GDataSource.dataLoadMargin to allow load more data than necessary to reduce data requests.
• rename GValueViewPort.minValueRange, maxValueRange to minRangeSize, maxRangeSize.
• remove yahoo_finance_data_reader dependency from example.

2025-05-22

• fix interaction fail to work when resize. (issue #49).
• add GCrosshair.updateStrategy property to allow customize when to show/hide crosshair. (issue #51).
• add GDataSeriesProperty.valueFormater property.
• add GPanel.onLongPressStartGraphArea, onLongPressMoveGraphArea, onLongPressEndGraphArea callbacks.
• add Diagnosticable implementation to components.
• add GDataSource.dataLoaded callback to allow do something else on updated data before rendering.
• update examples with new async data loading logic. (issue #50).

2025-05-14

• fix tap issue.
• add GDataSource.addSeries, GDataSource.removeSeries methods.
• add GChart.addPanel and GChart.removePanel methods.
• fix tooltip area top position issue.

2025-05-13

• fix interaction issues.
• pinch to zoom improvement on graph area.
• fix dataLoader not being called in some cases.

2025-05-11

• fix viewport's resizeMode not working correctly when resizing by splitter.
• fix resizing issue when there are more than two panels or any invisible panels.
• update examples 'workshop' to add 'add / remove' a panel.

2025-05-10

• refactor interactions.
  • [breaking change] remove GChartWidget.onTapXX callbacks. use onPointerDown, onPointerUp instead.
  • gesture handling improvement and fix gesture conflicts with other scrollable widget (issue #41).
  • hide interaction methods for internal use only.
• refactor examples to add workshop example.
• draw selection area on GGridGraph when selecting on axes.
• draw selected range labels on axes when selecting on axes.
• fix ohlc graph render issue when open has same value as close (issue #42).
• [0.2.5+1] add GPanel.onTapGraphArea and GPanel.onDoubleTapGraphArea callbacks.

2025-04-27

• add GGraphLine.smoothing.
• update example for GToolTip.tooltipWidgetBuilder.
• minor fix.

2025-04-25

• use batch drawing when possible to improve performance.
• add GToolTip.tooltipWidgetBuilder property to allow use custom widget as tooltip.
• add GChart.hitTestEnable property to allow disable hit testing globally.
• fix issue of highlight markers drawn outside the graph area.
• code refactoring.

2025-04-22

• [breaking change] code refactoring.
  • remove GGraphAreaTheme.styleValueAboveLine and styleValueBelowLine.
  • rename GGraphAreaTheme.styleAboveArea, styleAboveArea to styleAboveBase, styleBelowBase.
  • move GGraph.layer, hitTestMode, highlight to parent GComponent class.
  • remove GGraphOhlcTheme.lineStyleMinus and lineStylePlus.
  • remove PaintStyle.elevation and shadowColor.
• draw point value label (time string) to tooltip.
• fix notifyListeners error after disposed.
• add autoScaleFlg to GPointViewPort (fix issue #34).
• update examples.

2025-04-16

• [breaking change] code refactoring.
  • rename HitTestMode to GHitTestMode.
  • rename GChartController to GChartInteractionHandler.
  • rename ViewSizeConvertor to GViewSizeConvertor.
  • rename GPointAxisMarker.point to labelPoint.
  • remove GValue.call().
• add resizeMode to GPointViewPort and GValueViewPort to allow config the behavior when resizing.
• allow update graph properties (added setters).
• fix notifyListeners error after disposed.
• update examples.
• [0.2.1+1] code format & update examples.
• [0.2.1+2] property name viewPortResizeMode -> resizeMode and add to constructor.

2025-04-12

• [breaking change] refactor markers
  • rename GGraphMarker to GOverlayMarker so it can be also added to axes.
  • remove GGraph.axisMarkers property and rename GGraph.graphMarkers property to GGraph.overlayMarkers.
  • add GAxis.axisMarkers and GAxis.overlayMarkers properties.
  • update GTheme marker properties.
• fix rendering label with rotation.
• update Markers and Live examples.

2025-04-10

• fix issue GChartWidget not working correctly after chart object being recreated.
• add GPanel.graphPanMode property to allow disable panning graph.
• add GPointViewPort.startPointMin, GPointViewPort.endPointMax properties to allow range restriction.
• remove dependency intl and path_drawing to reduce dependency conflict.
• update Panels example.

2025-04-07

• fix mouse cursor for splitter
• fix for an issue in example dependency
• add GPanel.positionToViewPortCoord()
• update examples

2025-04-01

• add mouse cursor support
• fix basic example
• refactoring

2025-03-28

• expose GChartWidget.onTapXX callbacks
• add GChart.hitTestGraph(), GChart.saveAsImage()
• change GChart.preRender(), GChart.postRender() callbacks
• allow default valueViewPortId
• update examples
• [0.1.5+1] expose GChartWidget.onPointerDown, onPointerUp

2025-03-23

• bug fix
• update examples

2025-03-22

• bug fix
• Add live update demo

2025-03-20

• Add feature for issue #2: add momentum scrolling
• Add feature for issue #3: allow zooming in/out with mouse wheel
• [0.1.2+1] Update for issue #3: fix zoom center point
• [0.1.2+2] Change src files layout

2025-03-21

• [0.1.2+3] Fix for issue #3: fix zoom center point
• [0.1.2+4] Fix for issue #2: Add GPanel.momentumScrollSpeed option

2025-03-15

• Minor changes
• [0.1.1+1] Fix for linting
• [0.1.1+2] Fix for linting

2025-03-15

• First release