Method showRangeArrows

ij/src/main/java/ij/gui/PlotWindow.java:712–782

Creates an overlay with triangular buttons and othr symbols for changing the axis range limits and shows it

()

     * limits and shows it
     */
	@AstroImageJ(reason = "Support scaled plots", modified = true)
    void showRangeArrows() {
        if (imp == null)
            return;
        hideRangeArrows(); //in case we have old arrows from a different plot size or so
        rangeArrowRois = new Roi[4 * 2 + 2 + 4 + 2]; //4 arrows per axis, + 'Reset' and 'Fit All' icons, + 4 numerical input boxes + 2 axes
        int i = 0;
        int height = imp.getHeight();
		if (plot.isAijPlot()) {
			height = (int) (height / Prefs.getGuiScale());
		}
        int arrowH = plot.topMargin < 14 ? 6 : 8; //height of arrows and distance between them; base is twice that value
        float[] yP = new float[]{height - arrowH / 2, height - 3 * arrowH / 2, height - 5 * arrowH / 2 - 0.1f};

        for (float x : new float[]{plot.leftMargin, plot.leftMargin + plot.frameWidth}) { //create arrows for x axis
            float[] x0 = new float[]{x - arrowH / 2, x - 3 * arrowH / 2 - 0.1f, x - arrowH / 2};
            rangeArrowRois[i++] = new PolygonRoi(x0, yP, 3, Roi.POLYGON);
            float[] x1 = new float[]{x + arrowH / 2, x + 3 * arrowH / 2 + 0.1f, x + arrowH / 2};
            rangeArrowRois[i++] = new PolygonRoi(x1, yP, 3, Roi.POLYGON);
        }
        float[] xP = new float[]{arrowH / 2 - 0.1f, 3 * arrowH / 2, 5 * arrowH / 2 + 0.1f};
        for (float y : new float[]{plot.topMargin + plot.frameHeight, plot.topMargin}) { //create arrows for y axis
            float[] y0 = new float[]{y + arrowH / 2, y + 3 * arrowH / 2 + 0.1f, y + arrowH / 2};
            rangeArrowRois[i++] = new PolygonRoi(xP, y0, 3, Roi.POLYGON);
          float[] y1 = new float[]{y - arrowH / 2, y - 3 * arrowH / 2 - 0.1f, y - arrowH / 2};
            rangeArrowRois[i++] = new PolygonRoi(xP, y1, 3, Roi.POLYGON);
        }
        Font theFont = new Font("SansSerif", Font.BOLD, 13);

        TextRoi txtRoi = new TextRoi(1, height - 19, "\u2009R\u2009", theFont);  //thin spaces to make roi slightly wider
        rangeArrowRois[8] = txtRoi;
        TextRoi txtRoi2 = new TextRoi(20, height - 19, "\u2009F\u2009", theFont);
        rangeArrowRois[9] = txtRoi2;

		rangeArrowRois[10] = new Roi(plot.leftMargin - arrowH/2 + 1, height - 5 * arrowH / 2, arrowH - 2, arrowH * 2);//numerical box left
		rangeArrowRois[11] = new Roi(plot.leftMargin + plot.frameWidth - arrowH/2 + 1, height - 5 * arrowH / 2, arrowH - 2, arrowH * 2);//numerical box right
        rangeArrowRois[12] = new Roi(arrowH / 2, plot.topMargin + plot.frameHeight - arrowH/2 + 1, arrowH * 2, arrowH -2);//numerical box bottom
        rangeArrowRois[13] = new Roi(arrowH / 2, plot.topMargin - arrowH/2 + 1,  arrowH * 2, arrowH - 2   );//numerical box top

        int topMargin = plot.topMargin;
        int bottomMargin = topMargin + plot.frameHeight;
        int leftMargin = plot.leftMargin;
        int rightMargin = plot.leftMargin + plot.frameWidth;
        rangeArrowRois[14] = new Roi(leftMargin, bottomMargin+2,        // area to click for x axis options
				rightMargin - leftMargin + 1, 2*arrowH);
        rangeArrowRois[15] = new Roi(leftMargin-2*arrowH-2, topMargin,  // area to click for y axis options
				2*arrowH, bottomMargin - topMargin + 1);

		for (int i1 = 0; plot.isAijPlot() && i1 < rangeArrowRois.length; i1++) {
			var isRect = rangeArrowRois[i1].type == Roi.RECTANGLE;
			rangeArrowRois[i1] = RoiScaler.scale(rangeArrowRois[i1], Prefs.getGuiScale(), Prefs.getGuiScale(), false);
			rangeArrowRois[i1].setProperty("aijScaledRect", "" + isRect);
		}

        Overlay ovly = imp.getOverlay();
        if (ovly == null)
            ovly = new Overlay();
        for (Roi roi : rangeArrowRois) {