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schaumbschaumb
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Merge pull request #593 from vizzuhq/expose_data_points
Add marker top position to draw event
2 parents 9550dd3 + 3182d97 commit e46e2e3

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12 files changed

+104
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‎CHANGELOG.md‎

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@@ -14,6 +14,9 @@
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- Changed MarkerId to be a string instead of a number.
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### Added
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- Add marker top and center position to draw event
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## [0.14.0] - 2024-10-03
1922

‎src/apps/weblib/ts-api/events.ts‎

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@@ -137,11 +137,19 @@ export interface Logo extends Element {
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export interface Area extends Element {
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tagName: 'plot-area'
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}
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/** Marker element position structure helper for tooltip */
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export interface MarkerPosition {
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top: Point
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center: Point
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}
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/** Plot marker element of the chart representing a data point. */
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export interface Marker extends Element {
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tagName: 'plot-marker'
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categories: Data.Record
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values: Data.Record
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position: MarkerPosition
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/** Unique index of the marker. */
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index: string
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}

‎src/chart/main/events.h‎

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Original file line numberDiff line numberDiff line change
@@ -247,16 +247,23 @@ class Events
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struct Marker : Element
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{
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const Gen::Marker ▮
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struct DataPosition
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{
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Geom::Point top;
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Geom::Point center;
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} position;
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251-
explicit Marker(const Gen::Marker &marker) :
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explicit Marker(const Gen::Marker &marker,
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const DataPosition &position) :
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Element("plot-marker"),
253-
marker(marker)
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marker(marker),
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position(position)
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{}
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void appendToJSON(Conv::JSONObj &&jsonObj) const override
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{
258-
Element::appendToJSON(
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marker.appendToJSON(std::move(jsonObj)));
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Element::appendToJSON(marker.appendToJSON(
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std::move(jsonObj))("position", position));
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}
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};
262269

@@ -268,8 +275,10 @@ class Events
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{
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bool horizontal;
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271-
MarkerGuide(const Gen::Marker &marker, bool horizontal) :
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MarkerChild("guide", marker),
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MarkerGuide(const Gen::Marker &marker,
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const Marker::DataPosition &position,
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bool horizontal) :
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MarkerChild("guide", marker, position),
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horizontal(horizontal)
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{}
275284

@@ -313,15 +322,19 @@ class Events
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return std::make_unique<Legend>(properties);
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}
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316-
static auto marker(const Gen::Marker &marker)
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static auto marker(const Gen::Marker &marker,
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const Marker::DataPosition &position)
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{
318-
return std::make_unique<Marker>(marker);
328+
return std::make_unique<Marker>(marker, position);
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}
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static auto markerGuide(const Gen::Marker &marker,
332+
const Marker::DataPosition &position,
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bool horizontal)
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{
324-
return std::make_unique<MarkerGuide>(marker, horizontal);
335+
return std::make_unique<MarkerGuide>(marker,
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position,
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horizontal);
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}
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static auto root()
@@ -362,11 +375,13 @@ class Events
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}
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364377
static auto markerLabel(const std::string &label,
365-
const Gen::Marker &marker)
378+
const Gen::Marker &marker,
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const Marker::DataPosition &position)
366380
{
367381
return std::make_unique<Text<MarkerChild>>(label,
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"label",
369-
marker);
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marker,
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position);
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}
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372387
static auto dimLegendLabel(

‎src/chart/rendering/markerrenderer.cpp‎

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@@ -67,7 +67,9 @@ void MarkerRenderer::drawLines(Gfx::ICanvas &canvas,
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const Geom::Line line(axisPoint, blended.center);
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auto guideElement =
70-
Events::Targets::markerGuide(blended.marker, false);
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Events::Targets::markerGuide(blended.marker,
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blended.dataPosition,
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false);
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7274
if (rootEvents.draw.plot.marker.guide->invoke(
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Events::OnLineDrawEvent(*guideElement,
@@ -88,7 +90,9 @@ void MarkerRenderer::drawLines(Gfx::ICanvas &canvas,
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const Geom::Line line(center, axisPoint);
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auto guideElement =
91-
Events::Targets::markerGuide(blended.marker, true);
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Events::Targets::markerGuide(blended.marker,
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blended.dataPosition,
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true);
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9397
if (rootEvents.draw.plot.marker.guide->invoke(
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Events::OnLineDrawEvent(*guideElement,
@@ -262,7 +266,8 @@ void MarkerRenderer::draw(Gfx::ICanvas &canvas,
262266
canvas.setLineWidth(*rootStyle.plot.marker.borderWidth);
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264268
auto markerElement =
265-
Events::Targets::marker(abstractMarker.marker);
269+
Events::Targets::marker(abstractMarker.marker,
270+
abstractMarker.dataPosition);
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267272
auto colorAlpha =
268273
Math::FuzzyBool::And<double>(abstractMarker.enabled, factor);
@@ -363,7 +368,9 @@ void MarkerRenderer::drawLabel(Gfx::ICanvas &canvas,
363368
Gfx::ColorTransform::OverrideColor(
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(*labelStyle.filter)(color)*colorAlpha),
365370
*rootEvents.draw.plot.marker.label,
366-
Events::Targets::markerLabel(text, marker));
371+
Events::Targets::markerLabel(text,
372+
marker,
373+
abstractMarker.dataPosition));
367374
}
368375

369376
std::string MarkerRenderer::getLabelText(

‎src/chart/rendering/markers/abstractmarker.cpp‎

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@@ -47,6 +47,7 @@ AbstractMarker AbstractMarker::create(const DrawingContext &ctx,
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switch (shapeType) {
4848
case Gen::ShapeType::rectangle:
4949
return RectangleMarker(marker,
50+
ctx.coordSys,
5051
ctx.getOptions(),
5152
ctx.rootStyle);
5253
case Gen::ShapeType::circle:
@@ -132,6 +133,17 @@ AbstractMarker AbstractMarker::createInterpolated(
132133
return aMarker;
133134
}
134135

136+
void AbstractMarker::setDataPosition(const CoordinateSystem &coordSys)
137+
{
138+
dataPosition = {
139+
this->getLabelPos(Styles::MarkerLabel::Position::top,
140+
coordSys)
141+
.end,
142+
this->getLabelPos(Styles::MarkerLabel::Position::center,
143+
coordSys)
144+
.begin};
145+
}
146+
135147
Geom::Rect AbstractMarker::getBoundary() const
136148
{
137149
return Geom::Rect::Boundary(points);

‎src/chart/rendering/markers/abstractmarker.h‎

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@@ -35,6 +35,7 @@ class AbstractMarker
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Geom::Point center;
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Geom::Rect dataRect;
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double radius{};
38+
Events::Targets::Marker::DataPosition dataPosition;
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3940
[[nodiscard]] Geom::Rect getBoundary() const;
4041
[[nodiscard]] Geom::Line getLine() const;
@@ -51,6 +52,8 @@ class AbstractMarker
5152
const Gen::Marker &marker,
5253
const Gen::ShapeType &shapeType,
5354
::Anim::InterpolateIndex lineIndex);
55+
56+
void setDataPosition(const CoordinateSystem &coordSys);
5457
};
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5659
class SingleDrawMarker : public AbstractMarker

‎src/chart/rendering/markers/circlemarker.cpp‎

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@@ -38,6 +38,8 @@ CircleMarker::CircleMarker(const Gen::Marker &marker,
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dataRect.pos = pos;
3939
dataRect.size = Geom::Size();
4040
radius = fabs(coordSys.verConvert(r));
41+
42+
setDataPosition(coordSys);
4143
}
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}

‎src/chart/rendering/markers/connectingmarker.cpp‎

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@@ -158,6 +158,8 @@ ConnectingMarker::ConnectingMarker(const DrawingContext &ctx,
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159159
dataRect.pos = isLine ? points[2] : points[1];
160160
dataRect.size = Geom::Size{points[2] - dataRect.pos};
161+
162+
setDataPosition(ctx.coordSys);
161163
}
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163165
const Gen::Marker *ConnectingMarker::getPrev(

‎src/chart/rendering/markers/rectanglemarker.cpp‎

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@@ -16,6 +16,7 @@ namespace Vizzu::Draw
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{
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RectangleMarker::RectangleMarker(const Gen::Marker &marker,
19+
const CoordinateSystem &coordSys,
1920
const Gen::Options &options,
2021
const Styles::Chart &style) :
2122
SingleDrawMarker(marker, options, Gen::ShapeType::rectangle)
@@ -83,6 +84,8 @@ RectangleMarker::RectangleMarker(const Gen::Marker &marker,
8384
dataRect.pos = points[0];
8485
dataRect.size = Geom::Size{points[2] - points[0]};
8586
radius = 0;
87+
88+
setDataPosition(coordSys);
8689
}
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}

‎src/chart/rendering/markers/rectanglemarker.h‎

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@@ -10,6 +10,7 @@ class RectangleMarker : public SingleDrawMarker
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{
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public:
1212
RectangleMarker(const Gen::Marker &marker,
13+
const CoordinateSystem &coordSys,
1314
const Gen::Options &options,
1415
const Styles::Chart &style);
1516
};

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