X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fbin%2FHiDPISetting.java;h=d6d440a363298761080ea333db85f23dc7d60fe3;hb=baba84a1007310a6da1d81de3abeb2a79563213f;hp=3ff683e2eee4cde076e712c8306b547ccc8c84eb;hpb=984dbed9af3c4271b4785e197f6574b5f1d7105e;p=jalview.git

diff --git a/src/jalview/bin/HiDPISetting.java b/src/jalview/bin/HiDPISetting.java
index 3ff683e..d6d440a 100644
--- a/src/jalview/bin/HiDPISetting.java
+++ b/src/jalview/bin/HiDPISetting.java
@@ -1,20 +1,22 @@
 package jalview.bin;
 
-import java.awt.Toolkit;
+import java.awt.HeadlessException;
 
 public class HiDPISetting
 {
-  private static final int hidpiThreshold = 130;
+  private static final int hidpiThreshold = 160;
 
-  private static final int tallScreenThreshold = 1400;
+  private static final int hidpiMultiThreshold = 240;
 
-  private static final String scalePropertyName = "sun.java2d.uiScale";
+  private static final int bigScreenThreshold = 1400;
 
-  private static final boolean isAMac;
+  public static final String scalePropertyName = "sun.java2d.uiScale";
 
   private static final boolean isLinux;
 
-  private static final boolean isWindows;
+  // private static final boolean isAMac;
+
+  // private static final boolean isWindows;
 
   public static final String setHiDPIPropertyName = "setHiDPI";
 
@@ -36,13 +38,23 @@ public class HiDPISetting
 
   private static boolean allowScalePropertyArg = false;
 
+  private static ScreenInfo screenInfo = new ScreenInfo();
+
   static
   {
-    isAMac = System.getProperty("os.name").indexOf("Mac") > -1;
-    isLinux = System.getProperty("os.name").toLowerCase()
-            .indexOf("linux") > -1;
-    isWindows = System.getProperty("os.name").toLowerCase()
-            .indexOf("windows") > -1;
+    String system = System.getProperty("os.name") == null ? null
+            : System.getProperty("os.name").toLowerCase();
+    if (system != null)
+    {
+      isLinux = system.indexOf("linux") > -1;
+      // isAMac = system.indexOf("mac") > -1;
+      // isWindows = system.indexOf("windows") > -1;
+    }
+    else
+    {
+      isLinux = false;
+      // isAMac = isWindows = false;
+    }
   }
 
   private static void init()
@@ -52,6 +64,7 @@ public class HiDPISetting
       return;
     }
 
+    // get and use command line property values first
     String setHiDPIProperty = System.getProperty(setHiDPIPropertyName);
     setHiDPI = setHiDPIProperty != null
             && setHiDPIProperty.equalsIgnoreCase("true");
@@ -69,65 +82,86 @@ public class HiDPISetting
                 + setHiDPIScaleProperty + ") but not parseable as integer");
       }
     }
+    if (setHiDPI && setHiDPIScale > 0)
+    {
+      setHiDPIScale(setHiDPIScale);
+      return;
+    }
 
-    // try and get screen resolution
+    // check to see if the scale property has already been set by something else
+    // (e.g. the OS)
+    String existingProperty = System.getProperty(scalePropertyName);
+    if (existingProperty != null)
+    {
+      try
+      {
+        int existingPropertyVal = Integer.parseInt(existingProperty);
+        System.out.println("Existing " + scalePropertyName + " is "
+                + existingPropertyVal);
+        if (existingPropertyVal > 1)
+        {
+          setHiDPIScale(existingPropertyVal);
+          return;
+        }
+      } catch (NumberFormatException e)
+      {
+        System.out.println("Could not convert property " + scalePropertyName
+                + " vale '" + existingProperty + "' to number");
+      }
+    }
+
+    // Try and auto guess a good scale based on reported DPI (not trustworthy)
+    // and screen resolution (more trustworthy)
+
+    // get screen dpi
+    screenInfo = getScreenInfo();
     try
     {
-      dpi = Toolkit.getDefaultToolkit().getScreenResolution();
-    } catch (Throwable t)
+      dpi = screenInfo.getScreenResolution();
+    } catch (HeadlessException e)
     {
-      System.err.println("Cannot get screen resolution");
+      System.err.println("Cannot get screen resolution: " + e.getMessage());
     }
 
     // try and get screen size height and width
     try
     {
-      int height = Toolkit.getDefaultToolkit().getScreenSize().height;
-      int width = Toolkit.getDefaultToolkit().getScreenSize().width;
+      int height = screenInfo.getScreenHeight();
+      int width = screenInfo.getScreenWidth();
       // using mindimension in case of portrait screens
       mindimension = Math.min(height, width);
-    } catch (Throwable t)
+    } catch (HeadlessException e)
     {
-      System.err.println("Cannot get screen size height and width");
+      System.err.println(
+              "Cannot get screen size height and width:" + e.getMessage());
     }
 
-    if (setHiDPI && setHiDPIScale > 0)
-    {
-      scale = setHiDPIScale;
-    }
-    else
-    {
-      // attempt at a formula for scaling based on screen dpi and mindimension.
-      // scale
-      // will be an integer >=1
-      if (dpi > 0 && mindimension > 0)
-      {
-        scale = Math.min(dpi / hidpiThreshold,
-                mindimension / tallScreenThreshold) + 1;
-      }
-      else if (dpi == 0 && mindimension > tallScreenThreshold)
-      {
-        // dpi couldn't be found but the screen has a large vertical pixel count
-        scale = mindimension / tallScreenThreshold + 1;
-      }
-      /* do nothing if mindimension == 0 -- might be just a small HD screen (e.g. Gemini PDA)
-      else if (mindimension == 0 && dpi > hidpiThreshold)
-      {
-      }
-      */
-    }
+    // attempt at a formula for scaling based on screen dpi and mindimension.
+    // scale will be an integer >=1. This formula is based on some testing and
+    // guesswork!
+
+    // scale based on reported dpi. if dpi>hidpiThreshold then scale=2+multiples
+    // of hidpiMultiThreshold (else scale=1)
+    // (e.g. dpi of 110 scales 1. dpi of 120 scales 2. dpi of 360 scales 3)
+    int dpiScale = (dpi - hidpiThreshold > 0)
+            ? 2 + ((dpi - hidpiThreshold) / hidpiMultiThreshold)
+            : 1;
+
+    int dimensionScale = 1 + (mindimension / bigScreenThreshold);
 
-    // only make a change if scale is changed and other conditions (OS is linux)
-    // apply, or if setHiDPI has been specified
-    allowScalePropertyArg = (scale > 1 && isLinux) || setHiDPI;
+    // choose larger of dimensionScale or dpiScale (most likely dimensionScale
+    // as dpiScale often misreported)
+    int autoScale = Math.max(dpiScale, dimensionScale);
 
-    if (allowScalePropertyArg)
+    // only make an automatic change if scale is changed and other conditions
+    // (OS is linux) apply, or if setHiDPI has been specified
+    if ((autoScale > 1 && isLinux) || setHiDPI)
     {
-      System.out.println("boolean setHiDPI=" + setHiDPI);
-      System.out.println("DPI detected as " + dpi
-              + ". Scaling factor set to " + scale + ".");
+      setHiDPIScale(autoScale);
+      return;
     }
 
+    // looks like we're not doing any scaling
     doneInit = true;
   }
 
@@ -138,11 +172,41 @@ public class HiDPISetting
     doneInit = true;
   }
 
+  public static String getScalePropertyArg(int s)
+  {
+    return "-D" + scalePropertyName + "=" + String.valueOf(s);
+  }
+
   public static String getScalePropertyArg()
   {
     init();
     // HiDPI setting. Just looking at Linux to start with. Test with Windows.
-    return allowScalePropertyArg ? "-D" + scalePropertyName + "=" + scale
-            : null;
+    return allowScalePropertyArg ? getScalePropertyArg(scale) : null;
+  }
+
+  public static void clear()
+  {
+    setHiDPI = false;
+    setHiDPIScale = 0;
+    dpi = 0;
+    mindimension = 0;
+    width = 0;
+    scale = 0;
+    doneInit = false;
+    allowScalePropertyArg = false;
+  }
+
+  public static void setScreenInfo(ScreenInfo si)
+  {
+    screenInfo = si;
+  }
+
+  public static ScreenInfo getScreenInfo()
+  {
+    if (screenInfo == null)
+    {
+      screenInfo = new ScreenInfo();
+    }
+    return screenInfo;
   }
 }