Window decorations: added option to show window icon only in frames, but not in dialogs (issue #589)

CHANGELOG.md

@@ -14,9 +14,11 @@ FlatLaf Change Log
   is disabled. (issue #501)
 - TabbedPane: New option to disable tab run rotation in wrap layout. Set UI
   value `TabbedPane.rotateTabRuns` to `false`. (issue #574)
-- Native window decorations (Windows 10/11 only): Added client property to mark
+- Window decorations:
-  components in embedded menu bar as "caption" (allow moving window). (issue
+  - Added client property to mark components in embedded menu bar as "caption"
-  #569)
+    (allow moving window). (issue #569)
+  - Option to show window icon only in frames, but not in dialogs. Set UI value
+    `TitlePane.showIconInDialogs` to `false`. (issue #589)
 - Added system property `flatlaf.updateUIOnSystemFontChange` to allow disabling
   automatic UI update when system font changes. (issue #580)
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTitlePane.java

@@ -55,6 +55,7 @@ import javax.swing.BoxLayout;
 import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JComponent;
+import javax.swing.JDialog;
 import javax.swing.JLabel;
 import javax.swing.JMenuBar;
 import javax.swing.JPanel;
@@ -80,6 +81,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TitlePane.borderColor							Color	optional
  * @uiDefault TitlePane.unifiedBackground					boolean
  * @uiDefault TitlePane.showIcon							boolean
+ * @uiDefault TitlePane.showIconInDialogs					boolean
  * @uiDefault TitlePane.noIconLeftGap						int
  * @uiDefault TitlePane.iconSize							Dimension
  * @uiDefault TitlePane.iconMargins							Insets
@@ -111,6 +113,7 @@ public class FlatTitlePane
 	protected final Color borderColor = UIManager.getColor( "TitlePane.borderColor" );
 
 	/** @since 2 */ protected final boolean showIcon = FlatUIUtils.getUIBoolean( "TitlePane.showIcon", true );
+	/** @since 2.5 */ protected final boolean showIconInDialogs = FlatUIUtils.getUIBoolean( "TitlePane.showIconInDialogs", true );
 	/** @since 2 */ protected final int noIconLeftGap = FlatUIUtils.getUIInt( "TitlePane.noIconLeftGap", 8 );
 	protected final Dimension iconSize = UIManager.getDimension( "TitlePane.iconSize" );
 	/** @since 2.4 */ protected final int titleMinimumWidth = FlatUIUtils.getUIInt( "TitlePane.titleMinimumWidth", 60 );
@@ -389,9 +392,13 @@ public class FlatTitlePane
 	}
 
 	protected void updateIcon() {
+		boolean defaultShowIcon = showIcon;
+		if( !showIconInDialogs && rootPane.getParent() instanceof JDialog )
+			defaultShowIcon = false;
+
 		// get window images
 		List<Image> images = null;
-		if( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICON, showIcon ) ) {
+		if( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICON, defaultShowIcon ) ) {
 			images = window.getIconImages();
 			if( images.isEmpty() ) {
 				// search in owners

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -785,6 +785,7 @@ TitlePane.useWindowDecorations = true
 TitlePane.menuBarEmbedded = true
 TitlePane.unifiedBackground = true
 TitlePane.showIcon = true
+TitlePane.showIconInDialogs = true
 TitlePane.noIconLeftGap = 8
 TitlePane.iconSize = 16,16
 TitlePane.iconMargins = 3,8,3,8

flatlaf-testing/dumps/uidefaults/FlatDarkLaf_1.8.0.txt

@@ -1242,6 +1242,7 @@ TitlePane.noIconLeftGap        8
 TitlePane.restoreIcon          [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowRestoreIcon [UI]
 TitlePane.showIcon             true
 TitlePane.showIconBesideTitle  false
+TitlePane.showIconInDialogs    true
 TitlePane.titleMargins         3,0,3,0    javax.swing.plaf.InsetsUIResource [UI]
 TitlePane.titleMinimumWidth    60
 TitlePane.unifiedBackground    true

flatlaf-testing/dumps/uidefaults/FlatLightLaf_1.8.0.txt

@@ -1247,6 +1247,7 @@ TitlePane.noIconLeftGap        8
 TitlePane.restoreIcon          [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowRestoreIcon [UI]
 TitlePane.showIcon             true
 TitlePane.showIconBesideTitle  false
+TitlePane.showIconInDialogs    true
 TitlePane.titleMargins         3,0,3,0    javax.swing.plaf.InsetsUIResource [UI]
 TitlePane.titleMinimumWidth    60
 TitlePane.unifiedBackground    true

flatlaf-testing/dumps/uidefaults/FlatTestLaf_1.8.0.txt

@@ -1275,6 +1275,7 @@ TitlePane.noIconLeftGap        8
 TitlePane.restoreIcon          [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowRestoreIcon [UI]
 TitlePane.showIcon             true
 TitlePane.showIconBesideTitle  false
+TitlePane.showIconInDialogs    true
 TitlePane.titleMargins         3,0,3,0    javax.swing.plaf.InsetsUIResource [UI]
 TitlePane.titleMinimumWidth    60
 TitlePane.unifiedBackground    true

flatlaf-theme-editor/src/main/resources/com/formdev/flatlaf/themeeditor/FlatLafUIKeys.txt

@@ -1012,6 +1012,7 @@ TitlePane.noIconLeftGap
 TitlePane.restoreIcon
 TitlePane.showIcon
 TitlePane.showIconBesideTitle
+TitlePane.showIconInDialogs
 TitlePane.titleMargins
 TitlePane.titleMinimumWidth
 TitlePane.unifiedBackground