= (DateTickUnit) tickUnits.getCeilingTickUnit(estimate1); double labelHeight1 = estimateMaximumTickLabelHeight(g2, candidate1); double y1 = valueToJava2D(candidate1.getSize(), dataArea, edge); double candidate1UnitHeight = Math.abs(y1 - zero); = (labelHeight1 / candidate1UnitHeight) * candidate1.getSize(); DateTickUnit candidate2 = (DateTickUnit) tickUnits.getCeilingTickUnit(estimate2); double labelHeight2 = estimateMaximumTickLabelHeight(g2, candidate2); double y2 = valueToJava2D(candidate2.getSize(), dataArea, edge); double unit2Height = Math.abs(y2 - zero);
= (DateTickUnit) tickUnits.getCeilingTickUnit(estimate1); double labelHeight1 = estimateMaximumTickLabelHeight(g2, candidate1); double y1 = valueToJava2D(candidate1.getSize(), dataArea, edge); double candidate1UnitHeight = Math.abs(y1 - zero); = (labelHeight1 / candidate1UnitHeight) * candidate1.getSize(); DateTickUnit candidate2 = (DateTickUnit) tickUnits.getCeilingTickUnit(estimate2); double labelHeight2 = estimateMaximumTickLabelHeight(g2, candidate2); double y2 = valueToJava2D(candidate2.getSize(), dataArea, edge); double unit2Height = Math.abs(y2 - zero);
/** * Selects an appropriate tick size for the axis. The strategy is to * display as many ticks as possible (selected from a collection of * 'standard' tick units) without the labels overlapping. * * @param g2 the graphics device. * @param dataArea the area defined by the axes. * @param edge the axis location. */ protected void selectHorizontalAutoTickUnit(Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge) { double zero = valueToJava2D(0.0, dataArea, edge); double tickLabelWidth = estimateMaximumTickLabelWidth(g2, getTickUnit()); // start with the current tick unit... TickUnitSource tickUnits = getStandardTickUnits(); TickUnit unit1 = tickUnits.getCeilingTickUnit(getTickUnit()); double x1 = valueToJava2D(unit1.getSize(), dataArea, edge); double unit1Width = Math.abs(x1 - zero); // then extrapolate... double guess = (tickLabelWidth / unit1Width) * unit1.getSize(); DateTickUnit unit2 = (DateTickUnit) tickUnits.getCeilingTickUnit(guess); double x2 = valueToJava2D(unit2.getSize(), dataArea, edge); double unit2Width = Math.abs(x2 - zero); tickLabelWidth = estimateMaximumTickLabelWidth(g2, unit2); if (tickLabelWidth > unit2Width) { unit2 = (DateTickUnit) tickUnits.getLargerTickUnit(unit2); } setTickUnit(unit2, false, false); }
double x2 = valueToJava2D(shift + unit2.getSize(), dataArea, edge); double unit2Width = Math.abs(x2 - zero); tickLabelWidth = estimateMaximumTickLabelWidth(g2, unit2);