Implemented a solution for issue #2214

src/edt/edt/edtPartialService.cc

@@ -2315,8 +2315,8 @@ PartialService::mouse_release_event (const db::DPoint &p, unsigned int buttons,
     if (ui ()->mouse_event_viewport ().contains (p)) { 
 
       lay::Editable::SelectionMode mode = lay::Editable::Replace;
-      bool shift = ((m_buttons & lay::ShiftButton) != 0);
-      bool ctrl = ((m_buttons & lay::ControlButton) != 0);
+      bool shift = ((buttons & lay::ShiftButton) != 0);
+      bool ctrl = ((buttons & lay::ControlButton) != 0);
       if (shift && ctrl) {
         mode = lay::Editable::Invert;
       } else if (shift) {

src/laybasic/laybasic/gsiDeclLayAdded.cc

@@ -84,11 +84,15 @@ class ButtonStateNamespace { };
 static int const_ShiftButton()      { return (int) lay::ShiftButton; }
 static int const_ControlButton()    { return (int) lay::ControlButton; }
 static int const_AltButton()        { return (int) lay::AltButton; }
+static int const_ModifierMask()     { return (int) lay::ModifierMask; }
 static int const_LeftButton()       { return (int) lay::LeftButton; }
 static int const_MidButton()        { return (int) lay::MidButton; }
 static int const_RightButton()      { return (int) lay::RightButton; }
+static int const_MouseButtonMask()  { return (int) lay::MouseButtonMask; }
 
 Class<gsi::ButtonStateNamespace> decl_ButtonState ("lay", "ButtonState",
+  method ("ModifierMask", &const_ModifierMask, "@brief A bit mask that selects all keyboard modifiers in the button state mask\nThis constant has been introduced in version 0.30.6.") +
+  method ("MouseButtonMask", &const_MouseButtonMask, "@brief A bit mask that selects all mouse buttons in the button state mask\nThis constant has been introduced in version 0.30.6.") +
   method ("ShiftKey", &const_ShiftButton, "@brief Indicates that the Shift key is pressed\nThis constant is combined with other constants within \\ButtonState") +
   method ("ControlKey", &const_ControlButton, "@brief Indicates that the Control key is pressed\nThis constant is combined with other constants within \\ButtonState") +
   method ("AltKey", &const_AltButton, "@brief Indicates that the Alt key is pressed\nThis constant is combined with other constants within \\ButtonState") +

src/laybasic/laybasic/gsiDeclLayPlugin.cc

@@ -125,58 +125,76 @@ static void drag_cancel_impl (lay::EditorServiceBase *p)
 
 Class<lay::EditorServiceBase> decl_PluginBase ("lay", "PluginBase",
   gsi::method_ext ("tracking_position", &tracking_position_impl,
-    "@brief Gets the tracking position (base class implementation)"
+    "@brief Gets the tracking position (base class implementation)\n"
+    "See \\Plugin#tracking_position for details."
   ) +
   gsi::method_ext ("has_tracking_position", &has_tracking_position_impl,
-    "@brief Gets a value indicating whether the plugin provides a tracking position (base class implementation)"
+    "@brief Gets a value indicating whether the plugin provides a tracking position (base class implementation)\n"
+    "See \\Plugin#has_tracking_position for details."
   ) +
   gsi::method_ext ("menu_activated", &menu_activated_impl, gsi::arg ("symbol"),
-    "@brief Gets called when a custom menu item is selected (base class implementation)"
+    "@brief Gets called when a custom menu item is selected (base class implementation)\n"
+    "See \\Plugin#menu_activated for details."
   ) +
   gsi::method_ext ("configure", &configure_impl, gsi::arg ("name"), gsi::arg ("value"),
-    "@brief Sends configuration requests to the plugin (base class implementation)"
+    "@brief Sends configuration requests to the plugin (base class implementation)\n"
+    "See \\Plugin#configure for details."
   ) +
   gsi::method_ext ("config_finalize", &config_finalize_impl,
-    "@brief Sends the post-configuration request to the plugin (base class implementation)"
+    "@brief Sends the post-configuration request to the plugin (base class implementation)\n"
+    "See \\Plugin#config_finalize for details."
   ) +
   gsi::method_ext ("key_event", &key_event_impl, gsi::arg ("key"), gsi::arg ("buttons"),
-    "@brief Handles the key pressed event (base class implementation)"
+    "@brief Handles the key pressed event (base class implementation)\n"
+    "See \\Plugin#key_event for details."
   ) +
   gsi::method_ext ("mouse_button_pressed_event", &mouse_press_event_impl, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
-    "@brief Handles the mouse button pressed event (base class implementation)"
+    "@brief Handles the mouse button pressed event (base class implementation)\n"
+    "See \\Plugin#mouse_button_pressed_event for details."
   ) +
   gsi::method_ext ("mouse_click_event", &mouse_click_event_impl, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
-    "@brief Handles the mouse button click event after the button has been released (base class implementation)"
+    "@brief Handles the mouse button click event after the button has been released (base class implementation)\n"
+    "See \\Plugin#mouse_click_event for details."
   ) +
   gsi::method_ext ("mouse_double_click_event", &mouse_double_click_event_impl, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
-    "@brief Handles the mouse button double-click event (base class implementation)"
+    "@brief Handles the mouse button double-click event (base class implementation)\n"
+    "See \\Plugin#mouse_double_click_event for details."
   ) +
   gsi::method_ext ("leave_event", &leave_event_impl, gsi::arg ("prio"),
-    "@brief Handles the leave event (base class implementation)"
+    "@brief Handles the leave event (base class implementation)\n"
+    "See \\Plugin#leave_event for details."
   ) +
   gsi::method_ext ("enter_event", &enter_event_impl, gsi::arg ("prio"),
-    "@brief Handles the enter event (base class implementation)"
+    "@brief Handles the enter event (base class implementation)\n"
+    "See \\Plugin#enter_event for details."
   ) +
   gsi::method_ext ("mouse_moved_event", &mouse_move_event_impl, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
-    "@brief Handles the mouse move event (base class implementation)"
+    "@brief Handles the mouse move event (base class implementation)\n"
+    "See \\Plugin#mouse_moved_event for details."
   ) +
   gsi::method_ext ("mouse_button_released_event", &mouse_release_event_impl, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
-    "@brief Handles the mouse button release event (base class implementation)"
+    "@brief Handles the mouse button release event (base class implementation)\n"
+    "See \\Plugin#mouse_button_released_event for details."
   ) +
   gsi::method_ext ("wheel_event", &wheel_event_impl, gsi::arg ("delta"), gsi::arg ("horizontal"), gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
-    "@brief Handles the mouse wheel event (base class implementation)"
+    "@brief Handles the mouse wheel event (base class implementation)\n"
+    "See \\Plugin#wheel_event for details."
   ) +
   gsi::method_ext ("activated", &activated_impl,
-    "@brief Gets called when the plugin is activated (base class implementation)"
+    "@brief Gets called when the plugin is activated (base class implementation)\n"
+    "See \\Plugin#activated for details."
   ) +
   gsi::method_ext ("deactivated", &deactivated_impl,
-    "@brief Gets called when the plugin is deactivated and another plugin is activated (base class implementation)"
+    "@brief Gets called when the plugin is deactivated and another plugin is activated (base class implementation)\n"
+    "See \\Plugin#deactivated for details."
   ) +
   gsi::method_ext ("drag_cancel", &drag_cancel_impl,
-    "@brief This method is called when some mouse dragging operation should be cancelled (base class implementation)"
+    "@brief This method is called when some mouse dragging operation should be cancelled (base class implementation)\n"
+    "See \\Plugin#drag_cancel for details."
   ) +
   gsi::method_ext ("update", &update_impl,
-    "@brief Gets called when the view has changed (base class implementation)"
+    "@brief Gets called when the view has changed (base class implementation)\n"
+    "See \\Plugin#update for details."
   ),
   "@brief The plugin base class\n"
   "\n"
@@ -735,36 +753,44 @@ Class<gsi::PluginImpl> decl_Plugin (decl_PluginBase, "lay", "Plugin",
   ) +
   callback ("mouse_click_event", &gsi::PluginImpl::mouse_click_event_noref, &gsi::PluginImpl::f_mouse_click_event, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
     "@brief Handles the mouse button click event (after the button has been released)\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse button has been released without moving it.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse button has been released without moving it.\n"
+    "A mouse click is not defined by duration, but by releasing a button without moving the mouse after the button was pressed. "
+    "As a consequence, a \\mouse_button_pressed_event is always issued at the beginning, but it is not followed by a \\mouse_button_released_event.\n"
+    "Instead, the 'mouse_click_event' is issued.\n"
+    "\n"
+    "Starting with version 0.30.6, the button mask reflects the keyboard modifiers at the moment the mouse was released. Before, the keyboard modifiers were "
+    "captured at the moment when the mouse was pressed."
   ) +
   callback ("mouse_double_click_event", &gsi::PluginImpl::mouse_double_click_event_noref, &gsi::PluginImpl::f_mouse_double_click_event, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
     "@brief Handles the mouse button double-click event\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse button has been double-clicked.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse button has been double-clicked.\n"
   ) +
   callback ("leave_event", &gsi::PluginImpl::leave_event, &gsi::PluginImpl::f_leave_event, gsi::arg ("prio"),
     "@brief Handles the leave event (mouse leaves canvas area of view)\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse leaves the canvas area.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse leaves the canvas area.\n"
     "This method does not have a position nor button flags.\n"
   ) +
   callback ("enter_event", &gsi::PluginImpl::enter_event, &gsi::PluginImpl::f_enter_event, gsi::arg ("prio"),
     "@brief Handles the enter event (mouse enters canvas area of view)\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse enters the canvas area.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse enters the canvas area.\n"
     "This method does not have a position nor button flags.\n"
   ) +
   callback ("mouse_moved_event", &gsi::PluginImpl::mouse_move_event_noref, &gsi::PluginImpl::f_mouse_move_event, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
     "@brief Handles the mouse move event\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse is moved in the canvas area.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse is moved in the canvas area.\n"
     "\n"
     "The mouse move event is important for a number of background jobs, such as coordinate display in the status bar.\n"
     "Hence, you should not consume the event - i.e. you should return 'false' from this method.\n"
   ) +
   callback ("mouse_button_released_event", &gsi::PluginImpl::mouse_release_event_noref, &gsi::PluginImpl::f_mouse_release_event, gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
     "@brief Handles the mouse button release event\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse button is released.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse button is released.\n"
+    "Starting with version 0.30.6, the button mask reflects the keyboard modifiers at the moment the mouse was released. Before, the keyboard modifiers were "
+    "captured at the moment when the mouse was pressed."
   ) +
   callback ("wheel_event", &gsi::PluginImpl::wheel_event_noref, &gsi::PluginImpl::f_wheel_event, gsi::arg ("delta"), gsi::arg ("horizontal"), gsi::arg ("p"), gsi::arg ("buttons"), gsi::arg ("prio"),
     "@brief Handles the mouse wheel event\n"
-    "The behaviour of this callback is the same than for \\mouse_press_event, except that it is called when the mouse wheel is rotated.\n"
+    "The behaviour of this callback is the same than for \\mouse_button_pressed_event, except that it is called when the mouse wheel is rotated.\n"
     "Additional parameters for this event are 'delta' (the rotation angle in units of 1/8th degree) and 'horizontal' which is true when the horizontal wheel was rotated and "
     "false if the vertical wheel was rotated.\n"
   ) +

src/laybasic/laybasic/laySelector.cc

@@ -47,7 +47,6 @@ SelectionService::SelectionService (lay::LayoutViewBase *view) :
     mp_view (view),
     mp_box (0),
     m_color (0),
-    m_buttons (0),
     m_hover (false),
     m_hover_wait (false),
     m_mouse_in_window (false)
@@ -204,7 +203,6 @@ SelectionService::mouse_press_event (const db::DPoint &p, unsigned int buttons,
 
     if ((buttons & lay::LeftButton) != 0) {
       mp_view->stop_redraw (); // TODO: how to restart if selection is aborted?
-      m_buttons = buttons;
       begin (p);
       return true;
     }
@@ -263,7 +261,7 @@ SelectionService::mouse_click_event (const db::DPoint &p, unsigned int buttons,
 }
 
 bool 
-SelectionService::mouse_release_event (const db::DPoint & /*p*/, unsigned int /*buttons*/, bool prio) 
+SelectionService::mouse_release_event (const db::DPoint & /*p*/, unsigned int buttons, bool prio)
 { 
   hover_reset ();
 
@@ -274,8 +272,8 @@ SelectionService::mouse_release_event (const db::DPoint & /*p*/, unsigned int /*
     if (mp_view) { 
 
       lay::Editable::SelectionMode mode = lay::Editable::Replace;
-      bool shift = ((m_buttons & lay::ShiftButton) != 0);
-      bool ctrl = ((m_buttons & lay::ControlButton) != 0);
+      bool shift = ((buttons & lay::ShiftButton) != 0);
+      bool ctrl = ((buttons & lay::ControlButton) != 0);
       if (shift && ctrl) {
         mode = lay::Editable::Invert;
       } else if (shift) {

src/laybasic/laybasic/laySelector.h

@@ -91,7 +91,6 @@ public slots:
   lay::LayoutViewBase *mp_view;
   lay::RubberBox *mp_box;
   unsigned int m_color;
-  unsigned int m_buttons;
   bool m_hover;
   bool m_hover_wait;
   db::DPoint m_hover_point;

src/laybasic/laybasic/layViewObject.cc

@@ -907,7 +907,7 @@ ViewObjectUI::send_mouse_double_clicked_event (const db::DPoint &pt, unsigned in
 }
 
 void
-ViewObjectUI::send_mouse_release_event (const db::DPoint &pt, unsigned int /*buttons*/)
+ViewObjectUI::send_mouse_release_event (const db::DPoint &pt, unsigned int buttons)
 {
   try {
 
@@ -916,23 +916,27 @@ ViewObjectUI::send_mouse_release_event (const db::DPoint &pt, unsigned int /*but
 
     bool done = false;
 
+    //  Qt does not include the released button in the mask, so we take the mouse buttons that we stored
+    //  on "press", but use the current modifiers (issue #2214)
+    unsigned int effective_buttons = (m_mouse_buttons & lay::MouseButtonMask) | (buttons & lay::ModifierMask);
+
     m_mouse_pos = pt;
     db::DPoint p = pixel_to_um (m_mouse_pos);
 
     auto grabbed = m_grabbed;
     for (auto g = grabbed.begin (); !done && g != grabbed.end (); ++g) {
       if (m_mouse_pressed_state) {
-        done = (*g)->enabled () && (*g)->mouse_click_event (p, m_mouse_buttons, true);
+        done = (*g)->enabled () && (*g)->mouse_click_event (p, effective_buttons, true);
       } else {
-        done = (*g)->enabled () && (*g)->mouse_release_event (p, m_mouse_buttons, true);
+        done = (*g)->enabled () && (*g)->mouse_release_event (p, effective_buttons, true);
       }
     }
 
     if (! done && mp_active_service && mp_active_service->enabled ()) {
       if (m_mouse_pressed_state) {
-        done = mp_active_service->mouse_click_event (p, m_mouse_buttons, true);
+        done = mp_active_service->mouse_click_event (p, effective_buttons, true);
       } else {
-        done = mp_active_service->mouse_release_event (p, m_mouse_buttons, true);
+        done = mp_active_service->mouse_release_event (p, effective_buttons, true);
       }
     }
 
@@ -942,19 +946,19 @@ ViewObjectUI::send_mouse_release_event (const db::DPoint &pt, unsigned int /*but
       ++next;
       if ((*svc)->enabled ()) {
         if (m_mouse_pressed_state) {
-          done = (*svc)->mouse_click_event (p, m_mouse_buttons, false);
+          done = (*svc)->mouse_click_event (p, effective_buttons, false);
         } else {
-          done = (*svc)->mouse_release_event (p, m_mouse_buttons, false);
+          done = (*svc)->mouse_release_event (p, effective_buttons, false);
         }
       }
       svc = next;
     }
 
     if (! done) {
       if (m_mouse_pressed_state) {
-        mouse_click_event (p, m_mouse_buttons);
+        mouse_click_event (p, effective_buttons);
       } else {
-        mouse_release_event (p, m_mouse_buttons);
+        mouse_release_event (p, effective_buttons);
       }
     }
 

src/laybasic/laybasic/layViewObject.h

@@ -548,12 +548,14 @@ class LAYBASIC_PUBLIC ViewObject
  *  @brief Describes the button state (supposed to be ored)
  */
 enum ButtonState {
-  ShiftButton   = 1,
-  ControlButton = 2,
-  AltButton     = 4,
-  LeftButton    = 8,
-  MidButton     = 16,
-  RightButton   = 32
+  ShiftButton     = 0x01,
+  ControlButton   = 0x02,
+  AltButton       = 0x04,
+  ModifierMask    = 0x07,  //  all keyboard modifiers
+  LeftButton      = 0x08,
+  MidButton       = 0x10,
+  RightButton     = 0x20,
+  MouseButtonMask = 0x38   //  all mouse buttons
 };
 
 /**