[GTK4] Fix context menu not being shown

In GTK3, the menu is shown within gtk_button_press_event() iff the MENU
bit is set. In GTK4, this check has been inverted. Given that this bit
is always set, this means that the menu is never shown.

Additionally, GTK4 needs to be informed that the event has been consumed
by marking the event as claimed, to prevent bubbling. Practically
speaking, this prevents the default menu for GtkEntry's to be shown
together with the SWT menus.

Author: ptziegler

bundles/org.eclipse.swt/Eclipse SWT PI/gtk/library/gtk4.c

@@ -1346,6 +1346,18 @@ JNIEXPORT jlong JNICALL GTK4_NATIVE(gtk_1gesture_1drag_1new)
 }
 #endif
 
+#ifndef NO_gtk_1gesture_1get_1last_1updated_1sequence
+JNIEXPORT jlong JNICALL GTK4_NATIVE(gtk_1gesture_1get_1last_1updated_1sequence)
+	(JNIEnv *env, jclass that, jlong arg0)
+{
+	jlong rc = 0;
+	GTK4_NATIVE_ENTER(env, that, gtk_1gesture_1get_1last_1updated_1sequence_FUNC);
+	rc = (jlong)gtk_gesture_get_last_updated_sequence((GtkGesture *)arg0);
+	GTK4_NATIVE_EXIT(env, that, gtk_1gesture_1get_1last_1updated_1sequence_FUNC);
+	return rc;
+}
+#endif
+
 #ifndef NO_gtk_1gesture_1rotate_1new
 JNIEXPORT jlong JNICALL GTK4_NATIVE(gtk_1gesture_1rotate_1new)
 	(JNIEnv *env, jclass that)
@@ -1358,6 +1370,18 @@ JNIEXPORT jlong JNICALL GTK4_NATIVE(gtk_1gesture_1rotate_1new)
 }
 #endif
 
+#ifndef NO_gtk_1gesture_1set_1sequence_1state
+JNIEXPORT jboolean JNICALL GTK4_NATIVE(gtk_1gesture_1set_1sequence_1state)
+	(JNIEnv *env, jclass that, jlong arg0, jlong arg1, jint arg2)
+{
+	jboolean rc = 0;
+	GTK4_NATIVE_ENTER(env, that, gtk_1gesture_1set_1sequence_1state_FUNC);
+	rc = (jboolean)gtk_gesture_set_sequence_state((GtkGesture *)arg0, (GdkEventSequence *)arg1, (GtkEventSequenceState)arg2);
+	GTK4_NATIVE_EXIT(env, that, gtk_1gesture_1set_1sequence_1state_FUNC);
+	return rc;
+}
+#endif
+
 #ifndef NO_gtk_1gesture_1zoom_1new
 JNIEXPORT jlong JNICALL GTK4_NATIVE(gtk_1gesture_1zoom_1new)
 	(JNIEnv *env, jclass that)

bundles/org.eclipse.swt/Eclipse SWT PI/gtk/library/gtk4_stats.h

@@ -114,7 +114,9 @@ typedef enum {
 	gtk_1frame_1set_1child_FUNC,
 	gtk_1gesture_1click_1new_FUNC,
 	gtk_1gesture_1drag_1new_FUNC,
+	gtk_1gesture_1get_1last_1updated_1sequence_FUNC,
 	gtk_1gesture_1rotate_1new_FUNC,
+	gtk_1gesture_1set_1sequence_1state_FUNC,
 	gtk_1gesture_1zoom_1new_FUNC,
 	gtk_1hsv_1to_1rgb_FUNC,
 	gtk_1icon_1paintable_1get_1file_FUNC,

bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk4/GTK4.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2021, 2024 Syntevo and others.
+ * Copyright (c) 2021, 2025 Syntevo and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -22,6 +22,10 @@ public class GTK4 {
 
 	public static final int GTK_POPOVER_MENU_NESTED = 1 << 0;
 
+	public static final int GTK_EVENT_SEQUENCE_NONE = 0;
+	public static final int GTK_EVENT_SEQUENCE_CLAIMED = 1;
+	public static final int GTK_EVENT_SEQUENCE_DENIED = 2;
+
 	/**
 	 * @param context cast=(GtkIMContext *)
 	 * @param event cast=(GdkEvent *)
@@ -825,4 +829,16 @@ public class GTK4 {
 
 	public static final native long gtk_gesture_drag_new();
 
+	/**
+	 * @param gesture cast=(GtkGesture *)
+	 * @param sequence cast=(GdkEventSequence *)
+	 * @param state cast=(GtkEventSequenceState)
+	 */
+	public static final native boolean gtk_gesture_set_sequence_state(long gesture, long sequence, int state);
+
+	/**
+	 * @param gesture cast=(GtkGesture *)
+	 */
+	public static final native long gtk_gesture_get_last_updated_sequence(long gesture);
+
 }

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Control.java

@@ -3416,7 +3416,7 @@ void gtk_gesture_press_event (long gesture, int n_press, double x, double y, lon
 	display.clickCount = n_press;
 	if (n_press == 1) {
 		sendMouseEvent(SWT.MouseDown, eventButton, n_press, 0, false, eventTime, x, y, false, eventState);
-		if ((state & MENU) == 0) {
+		if ((state & MENU) != 0) {
 			if (eventButton == 3) {
 				showMenu ((int)x, (int)y);
 			}

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Widget.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2024 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -2531,6 +2531,7 @@ boolean keyPressReleaseProc(long controller, int keyval, int keycode, int state,
 
 void gesturePressReleaseProc(long gesture, int n_press, double x, double y, long user_data) {
 	long event = GTK4.gtk_event_controller_get_current_event(gesture);
+	long sequence = GTK4.gtk_gesture_get_last_updated_sequence(gesture);
 
 	switch ((int)user_data) {
 		case GESTURE_PRESSED:
@@ -2540,6 +2541,8 @@ void gesturePressReleaseProc(long gesture, int n_press, double x, double y, long
 			gtk_gesture_release_event(gesture, n_press, x, y, event);
 			break;
 	}
+
+	GTK4.gtk_gesture_set_sequence_state(gesture, sequence, GTK4.GTK_EVENT_SEQUENCE_CLAIMED);
 }
 
 void leaveProc(long controller, long handle, long user_data) {