Class HiDPIUtils


  • public class HiDPIUtils
    extends Object
    • Constructor Detail

      • HiDPIUtils

        public HiDPIUtils()
    • Method Detail

      • paintAtScale1x

        public static void paintAtScale1x​(Graphics2D g,
                                          int x,
                                          int y,
                                          int width,
                                          int height,
                                          HiDPIUtils.Painter painter)
        Paint at system scale factor 1x to avoid rounding issues at 125%, 150% and 175% scaling.

        Scales the given Graphics2D down to 100% and invokes the given painter passing scaled x, y, width and height.

        Uses the same scaling calculation as the JRE uses.

      • computeTextYCorrection

        public static float computeTextYCorrection​(Graphics2D g)
        When painting text on HiDPI screens and the JRE scales, then the text is painted too far down on some operating systems. The higher the system scale factor is, the more.

        This method computes a correction value for the Y position.

      • drawStringWithYCorrection

        public static void drawStringWithYCorrection​(JComponent c,
                                                     Graphics2D g,
                                                     String text,
                                                     int x,
                                                     int y)
        Applies Y correction and draws the given string at the specified location. The provided component is used to query text properties and anti-aliasing hints.

        Use this method instead of Graphics.drawString(String, int, int) for correct anti-aliasing.

        Replacement for SwingUtilities2.drawString().

      • drawStringUnderlineCharAtWithYCorrection

        public static void drawStringUnderlineCharAtWithYCorrection​(JComponent c,
                                                                    Graphics2D g,
                                                                    String text,
                                                                    int underlinedIndex,
                                                                    int x,
                                                                    int y)
        Applies Y correction and draws the given string at the specified location underlining the specified character. The provided component is used to query text properties and anti-aliasing hints.

        Replacement for SwingUtilities2.drawStringUnderlineCharAt().

      • createGraphicsTextYCorrection

        public static Graphics2D createGraphicsTextYCorrection​(Graphics2D g)
        Creates a graphics object and applies Y correction to string drawing methods. If no Y correction is necessary, the passed in graphics object is returned.