Add ui::IGNORE_MOUSE flag for static widgets

This avoids some MouseEnter/Leave messages between widgets that don't
need them.

src/app/ui/button_set.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -300,6 +301,7 @@ ButtonSet::ButtonSet(int columns)
   , m_triggerOnMouseUp(false)
   , m_multipleSelection(false)
 {
+  enableFlags(IGNORE_MOUSE);
   InitTheme.connect(
     [this]{
       noBorderNoChildSpacing();

src/app/ui/workspace.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -41,6 +42,7 @@ Workspace::Workspace()
   , m_dropPreviewPanel(nullptr)
   , m_dropPreviewTabs(nullptr)
 {
+  enableFlags(IGNORE_MOUSE);
   addChild(&m_mainPanel);
 
   InitTheme.connect(

src/app/ui/workspace_panel.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -47,6 +48,7 @@ WorkspacePanel::WorkspacePanel(PanelType panelType)
   , m_topTime(0)
   , m_bottomTime(0)
 {
+  enableFlags(IGNORE_MOUSE);
   InitTheme.connect(
     [this]{
       SkinTheme* theme = static_cast<SkinTheme*>(this->theme());

src/ui/base.h

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2016  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -50,7 +51,8 @@ namespace ui {
     DOUBLE_BUFFERED  = 0x00002000, // The widget is painted in a back-buffer and then flipped to the main display
     TRANSPARENT      = 0x00004000, // The widget has transparent parts that needs the background painted before
     CTRL_RIGHT_CLICK = 0x00008000, // The widget should transform Ctrl+click to right-click on OS X.
-    PROPERTIES_MASK  = 0x0000ffff,
+    IGNORE_MOUSE     = 0x80000000, // Don't process mouse messages for this widget (useful for labels, boxes, grids, etc.)
+    PROPERTIES_MASK  = 0x8000ffff,
 
     HORIZONTAL       = 0x00010000,
     VERTICAL         = 0x00020000,
@@ -62,7 +64,7 @@ namespace ui {
     BOTTOM           = 0x00800000,
     HOMOGENEOUS      = 0x01000000,
     WORDWRAP         = 0x02000000,
-    ALIGN_MASK       = 0xffff0000,
+    ALIGN_MASK       = 0x7fff0000,
   };
 
 } // namespace ui

src/ui/box.cpp

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -22,6 +23,7 @@ using namespace gfx;
 Box::Box(int align)
   : Widget(kBoxWidget)
 {
+  enableFlags(IGNORE_MOUSE);
   setAlign(align);
   initTheme();
 }

src/ui/grid.cpp

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -42,6 +43,8 @@ Grid::Grid(int columns, bool same_width_columns)
 {
   ASSERT(columns > 0);
 
+  enableFlags(IGNORE_MOUSE);
+
   m_same_width_columns = same_width_columns;
 
   for (std::size_t col=0; col<m_colstrip.size(); ++col) {

src/ui/label.cpp

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -19,6 +20,7 @@ namespace ui {
 Label::Label(const std::string& text)
   : Widget(kLabelWidget)
 {
+  enableFlags(IGNORE_MOUSE);
   setAlign(LEFT | MIDDLE);
   setText(text);
   initTheme();

src/ui/link_label.cpp

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -22,6 +23,7 @@ LinkLabel::LinkLabel(const std::string& urlOrText)
   : Label(urlOrText)
   , m_url(urlOrText)
 {
+  disableFlags(IGNORE_MOUSE);
   setType(kLinkLabelWidget);
   initTheme();
 }
@@ -30,6 +32,7 @@ LinkLabel::LinkLabel(const std::string& url, const std::string& text)
   : Label(text)
   , m_url(url)
 {
+  disableFlags(IGNORE_MOUSE);
   setType(kLinkLabelWidget);
   initTheme();
 }

src/ui/manager.cpp

@@ -504,8 +504,13 @@ void Manager::handleMouseMove(const gfx::Point& mousePos,
   Widget* widget = nullptr;
   for (auto mouseWidget : mouse_widgets_list) {
     widget = mouseWidget->pick(mousePos);
-    if (widget)
+    if (widget) {
+      // Get the first ancestor of the picked widget that doesn't
+      // ignore mouse events.
+      while (widget && widget->hasFlags(IGNORE_MOUSE))
+        widget = widget->parent();
       break;
+    }
   }
 
   // Fixup "mouse" flag

src/ui/menu.cpp

@@ -104,6 +104,7 @@ Menu::Menu()
   : Widget(kMenuWidget)
   , m_menuitem(NULL)
 {
+  enableFlags(IGNORE_MOUSE);
   initTheme();
 }
 

src/ui/separator.cpp

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -22,6 +23,7 @@ using namespace gfx;
 Separator::Separator(const std::string& text, int align)
  : Widget(kSeparatorWidget)
 {
+  enableFlags(IGNORE_MOUSE);
   setAlign(align);
   if (!text.empty())
     setText(text);

src/ui/view.cpp

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -46,6 +47,7 @@ View::View()
 {
   m_hasBars = true;
 
+  enableFlags(IGNORE_MOUSE);
   setFocusStop(true);
   addChild(&m_viewport);
   setScrollableSize(Size(0, 0));

src/ui/viewport.cpp

@@ -1,5 +1,6 @@
 // Aseprite UI Library
-// Copyright (C) 2001-2013, 2015  David Capello
+// Copyright (C) 2018  Igara Studio S.A.
+// Copyright (C) 2001-2015  David Capello
 //
 // This file is released under the terms of the MIT license.
 // Read LICENSE.txt for more information.
@@ -24,6 +25,7 @@ using namespace gfx;
 Viewport::Viewport()
   : Widget(kViewViewportWidget)
 {
+  enableFlags(IGNORE_MOUSE);
   initTheme();
 }