Add ui::expandWindow() to change the size of a window dynamically

src/app/commands/cmd_export_sprite_sheet.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2020  Igara Studio S.A.
+// Copyright (C) 2019-2021  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -903,10 +903,7 @@ private:
   }
 
   void resize() {
-    gfx::Size reqSize = sizeHint();
+    expandWindow(sizeHint());
-    moveWindow(gfx::Rect(origin(), reqSize));
-    layout();
-    invalidate();
   }
 
   void updateExportButton() {

src/app/commands/cmd_import_sprite_sheet.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2020  Igara Studio S.A.
+// Copyright (C) 2019-2021  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -352,10 +352,7 @@ private:
   }
 
   void resize() {
-    gfx::Size reqSize = sizeHint();
+    expandWindow(sizeHint());
-    moveWindow(gfx::Rect(origin(), reqSize));
-    layout();
-    invalidate();
   }
 
   Context* m_context;

src/app/commands/cmd_new_file.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2020  Igara Studio S.A.
+// Copyright (C) 2018-2021  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -154,13 +154,8 @@ void NewFileCommand::onExecute(Context* ctx)
     window.advancedCheck()->setSelected(advanced);
     window.advancedCheck()->Click.connect(
       [&]{
-        gfx::Rect bounds = window.bounds();
         window.advanced()->setVisible(window.advancedCheck()->isSelected());
-        window.setBounds(gfx::Rect(window.bounds().origin(),
+        window.expandWindow(window.sizeHint());
-                                   window.sizeHint()));
-        window.layout();
-
-        window.manager()->invalidateRect(bounds);
       });
     window.advanced()->setVisible(advanced);
     if (advanced)

src/ui/window.cpp

@@ -285,11 +285,10 @@ void Window::remapWindow()
 {
   if (m_isAutoRemap) {
     m_isAutoRemap = false;
-    this->setVisible(true);
+    setVisible(true);
   }
 
-  setBounds(Rect(Point(bounds().x, bounds().y),
+  expandWindow(sizeHint());
-                 sizeHint()));
 
   // load layout
   loadLayout();
@@ -323,6 +322,16 @@ void Window::moveWindow(const gfx::Rect& rect)
   moveWindow(rect, true);
 }
 
+void Window::expandWindow(const gfx::Size& size)
+{
+  const gfx::Rect oldBounds = bounds();
+
+  setBounds(gfx::Rect(bounds().origin(), size));
+
+  layout();
+  manager()->invalidateRect(oldBounds);
+}
+
 void Window::openWindow()
 {
   if (!parent()) {

src/ui/window.h

@@ -44,6 +44,9 @@ namespace ui {
     void positionWindow(int x, int y);
     void moveWindow(const gfx::Rect& rect);
 
+    // Expands or shrink the window to the given side (generally sizeHint())
+    void expandWindow(const gfx::Size& size);
+
     void openWindow();
     void openWindowInForeground();
     void closeWindow(Widget* closer);