From b6a504e121391fcbb44b52b05e244a5f4cc51185 Mon Sep 17 00:00:00 2001
From: Karl Tauber <karl@jformdesigner.com>
Date: Mon, 27 Dec 2021 21:49:49 +0100
Subject: [PATCH] Theme Editor: fixed "Pick Color from Screen" on macOS

On macOS Big Sur (and later), to pick colors outside of theme editor window it is necessary to give "Screen Recording" permission to the application (or to the IDE started from).
For the arrow keys, "Accessibility" permission is necessary.
See "System Preferences > Security & Privacy > Privacy".
---
 .../flatlaf/themeeditor/FlatColorPipette.java | 22 ++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatColorPipette.java b/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatColorPipette.java
index 3eab0536..25d8dd1a 100644
--- a/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatColorPipette.java
+++ b/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatColorPipette.java
@@ -44,6 +44,7 @@ import com.formdev.flatlaf.icons.FlatAbstractIcon;
 import com.formdev.flatlaf.ui.FlatEmptyBorder;
 import com.formdev.flatlaf.ui.FlatLineBorder;
 import com.formdev.flatlaf.util.HSLColor;
+import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -93,7 +94,9 @@ class FlatColorPipette
 
 			setAlwaysOnTop( true );
 			setUndecorated( true );
-			setOpacity( 0.005f );
+			// macOS: windows with opacity smaller than 0.05 does not receive
+			//        mouse clicked/pressed/released events (but mouse moved events)
+			setOpacity( SystemInfo.isMacOS ? 0.05f : 0.005f );
 			setBounds( owner.getGraphicsConfiguration().getBounds() );
 
 			robot = new Robot( owner.getGraphicsConfiguration().getDevice() );
@@ -109,6 +112,8 @@ class FlatColorPipette
 					// (temporary change opacity to zero to get correct color from robot)
 					float oldOpacity = getOpacity();
 					setOpacity( 0 );
+					if( SystemInfo.isMacOS )
+						robot.delay( 20 ); // give macOS some time to update the opacity
 					Color color = robot.getPixelColor( lastX, lastY );
 					setOpacity( oldOpacity );
 
@@ -120,10 +125,17 @@ class FlatColorPipette
 				public void mouseClicked( MouseEvent e ) {
 					dispose();
 
-					if( SwingUtilities.isLeftMouseButton( e ) )
-						pick( robot.getPixelColor( e.getX(), e.getY() ) );
-					else
-						pick( null );
+					Color color = null;
+					if( SwingUtilities.isLeftMouseButton( e ) ) {
+						// on macOS, robot not always returns correct color
+						// in mouse clicked event (sometimes black; sometimes
+						// includes opacity of disposed window)
+						// --> use last hover color on macOS
+						color = SystemInfo.isMacOS
+							? lastHoverColor
+							: robot.getPixelColor( e.getX(), e.getY() );
+					}
+					pick( color );
 				}
 			};