Function graphDrawAxesAndLabels

src/OpenLoco/src/Ui/Chart.cpp:67–183

0x004CFA49

    // 0x004CFA49
    static void graphDrawAxesAndLabels(const GraphSettings& gs, Window& self, Gfx::DrawingContext& drawingCtx)
    {
        auto xAxisLabelValue = gs.xAxisRange;
        if ((gs.flags & GraphFlags::dataFrontToBack) != GraphFlags::none)
        {
            xAxisLabelValue -= (gs.dataEnd - 1) * gs.xAxisStepSize;
        }

        // 0x004CFA74
        for (auto xTickPos = 0U; xTickPos < gs.dataEnd; xTickPos++)
        {
            auto remainder = xAxisLabelValue % gs.xAxisLabelIncrement;

            // Draw vertical lines for each of the data points
            {
                auto xPos = xTickPos * gs.xAxisTickIncrement + gs.left + gs.xOffset;
                auto height = gs.canvasHeight + (remainder == 0 ? 3 : 0);

                auto colour = self.getColour(WindowColour::secondary).c();
                auto paletteIndex = Colours::getShade(colour, remainder == 0 ? 6 : 4);

                drawingCtx.drawRect(xPos, gs.top, 1, height, paletteIndex, Gfx::RectFlags::none);
            }

            // No remainder means we get to draw a label on the horizontal axis, too
            if (remainder == 0)
            {
                int16_t xPos = xTickPos * gs.xAxisTickIncrement + gs.left + gs.xOffset;
                int16_t yPos = gs.canvasBottom + 5;

                auto tr = Gfx::TextRenderer(drawingCtx);
                auto formatArgs = FormatArguments{};
                formatArgs.push(gs.xLabel);
                formatArgs.push(xAxisLabelValue);

                tr.drawStringCentred({ xPos, yPos }, Colour::black, StringIds::graph_label_format, formatArgs);
            }

            xAxisLabelValue += gs.xAxisStepSize;
        }

        // 0x004CFB5C
        auto yAxisPos = 0;
        while (true)
        {
            // Draw horizontal lines for each of the vertical axis labels
            {
                auto colour = self.getColour(WindowColour::secondary).c();
                auto paletteIndex = Colours::getShade(colour, 6);

                auto xPos = gs.left + gs.xOffset - 2;
                auto width = gs.width - gs.xOffset + 3;
                auto yPos = -yAxisPos + gs.canvasHeight + gs.top;
                if ((gs.flags & GraphFlags::showNegativeValues) != GraphFlags::none)
                {
                    yPos -= gs.canvasHeight / 2;
                }