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Hi-DPI: tentative auto DPI detection for Linux

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See #6472 #4376
This commit is contained in:
Cristian Maglie 2017-07-18 17:25:25 +02:00 committed by Martino Facchin
parent c4f5cafd33
commit b70a7d088e
1 changed files with 18 additions and 0 deletions
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18
arduino-core/src/processing/app/linux/Platform.java
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@ -25,8 +25,11 @@ package processing.app.linux;
import processing.app.PreferencesData; import processing.app.PreferencesData;
import processing.app.legacy.PConstants; import processing.app.legacy.PConstants;
import java.awt.Font;
import java.io.File; import java.io.File;
import javax.swing.UIManager;
/** /**
* Used by Base for platform-specific tweaking, for instance finding the * Used by Base for platform-specific tweaking, for instance finding the
@ -117,4 +120,19 @@ public class Platform extends processing.app.Platform {
public String getName() { public String getName() {
return PConstants.platformNames[PConstants.LINUX]; return PConstants.platformNames[PConstants.LINUX];
} }
private int detectedDpi = -1;
@Override
public int getSystemDPI() {
if (detectedDpi != -1)
return detectedDpi;
// we observed that JMenu fonts in java follows the
// System DPI settings, so we compare it to the standard
// font size (12) to obtain a rough estimate of DPI.
Font menuFont = UIManager.getFont("Menu.font");
detectedDpi = menuFont.getSize() * 96 / 12;
return detectedDpi;
}
} }