android - Afree图表: How to increase X axis values(gap or domain range) while zooming

Question

任何人都可以帮助我进行下面的缩放!在进行水平缩放时，我想增加并显示间隙或范围。

现在附加链接上的范围是 10,12,14,16... 缩放时应显示为 10,11,12,13,...我如何在缩放时增加这个域范围。请指导我。

Answer 1

protected 静态 int gapValue；//两个日期之间的差距

private void zoom(PointF source, double startDistance, double endDistance) {

    Plot plot = this.chart.getPlot();
    PlotRenderingInfo info = this.info.getPlotInfo();

    if (plot instanceof Zoomable) {
        float scaleDistance = (float) (startDistance / endDistance);
    //for maintaining the limit of zooming range  horizontally
        if (this.mScale * scaleDistance <= 1.0f
                && this.mScale * scaleDistance > 0.1f) {
            this.mScale *= scaleDistance;
            Zoomable z = (Zoomable) plot;
            z.zoomDomainAxes(scaleDistance, info, source, false);

            int sealValue = (int) (gapValue * this.mScale);
            // gap shoud be greater than zero
            if (sealValue == 0)
                sealValue = 1;
        // To re-render the graph dates in domain axis
            ((DateAxis) this.getChart().getXYPlot().getDomainAxis())
                    .setTickUnit(new DateTickUnit(DateTickUnitType.DAY,
                            sealValue, new SimpleDateFormat("MM/dd")));

        }
    }

    // repaint
    invalidate();