Improve BoardCanvas

TODO.md

@@ -1,7 +1,7 @@
 # TODO
 
 ## Before releasing v0.1.0
- - [ ] In BoardCanvas search for a workaround of the dynamic allocation of adata.buffer (on canvas resize)
+ - [x] In BoardCanvas search for a workaround of the dynamic allocation of adata.buffer (on canvas resize)
  - [ ] Bind the chess game editor settings to EditorPrefs.hpp
  - [ ] Ask before closing MainWindow/Tabs if anything is not saved
  - [ ] Disable the save button in GameTab after saving (and re-enable it on new changes)

src/game_tab/left_panel/board/BoardCanvas.cpp

@@ -21,8 +21,7 @@ BoardCanvas::BoardCanvas(wxFrame *parent)
   adata.duration_fast=80;
   adata.fps=30;
   adata.buffer=new wxBitmap(500,500,32);
-  adata.reuseBuffer=false;
+  adata.animate=false;
-  adata.buffer=nullptr;
   // Init game state
   gs.is_black_turn=false;
   gs.board = "rnbqkbnrpppppppp                                PPPPPPPPRNBQKBNR";
@@ -41,7 +40,6 @@ BoardCanvas::BoardCanvas(wxFrame *parent)
   Bind(wxEVT_KEY_DOWN, [p=this](wxKeyEvent &e){e.ResumePropagation(1);e.Skip();});
   Bind(wxEVT_KEY_UP, [p=this](wxKeyEvent &e){e.ResumePropagation(1);e.Skip();});
   Bind(wxEVT_PAINT, &BoardCanvas::OnPaint, this);
-  Bind(wxEVT_SIZE, &BoardCanvas::OnResize, this);
   // Mouse events:
   Bind(wxEVT_MOTION, &BoardCanvas::MouseEvent, this);
   Bind(wxEVT_LEFT_DOWN, &BoardCanvas::MouseEvent, this);
@@ -51,16 +49,6 @@ BoardCanvas::BoardCanvas(wxFrame *parent)
   Bind(wxEVT_RIGHT_DCLICK, &BoardCanvas::MouseEvent, this);
 }
 
-void BoardCanvas::OnResize(wxSizeEvent &e){
-  wxSize size=e.GetSize();
-  if(size.x>100 && size.y>100){
-    // Setup buffer (use for animations)
-    if(adata.buffer!=nullptr)
-      free(adata.buffer);
-    adata.buffer=new wxBitmap(size.x,size.y,32);
-  }
-}
-
 BoardCanvas::~BoardCanvas() {
   delete t;
   delete t_captures;
@@ -82,7 +70,7 @@ void BoardCanvas::OnPaint(wxPaintEvent &event) {
   dc.SetBackground(*wxWHITE_BRUSH);
   dc.Clear();
   
-  if(!adata.reuseBuffer){
+  if(!adata.animate){
     // Setting up required attributes
     REFRESH_MOUSE_LOCATION();
     square_width = t->GetSquaresSizes();
@@ -94,14 +82,10 @@ void BoardCanvas::OnPaint(wxPaintEvent &event) {
       boardX = 0;
     if (boardY > canvas_size.y)
       boardY = 0;
-    wxMemoryDC memDC(*adata.buffer);
+    DrawBoard(dc);
-    memDC.SetBackground(*wxWHITE_BRUSH);
-    memDC.Clear();
-    DrawBoard(memDC);
-    dc.Blit(0,0,canvas_size.x,canvas_size.y,(wxDC*)&memDC,0,0);
   }
   else {
-    // Otherwise reuse buffer and animate
+    // Reuse buffer and animate
     dc.DrawBitmap(*adata.buffer, 0, 0, true);
     double percent=adata.frame/adata.frames;
     // Draw moving piece
@@ -155,9 +139,17 @@ void BoardCanvas::Animate(const GameState &new_gs, const std::string &src, const
   std::uint8_t prank = src[1]-'1';
   adata.piece_moved = gs.board[pfile + 8 * (7-prank)]; // Piece to move
   
-  // Now remove the piece that will be moved
+  // Now init adata.buffer and remove the piece that will be moved
   gs.board[pfile + 8 * (7-prank)]=' ';
+  wxSize buffer_size=adata.buffer->GetSize();
+  if(canvas_size!=buffer_size){
+    wxLogDebug("Allocate a new animation buffer");
+    free(adata.buffer);
+    adata.buffer=new wxBitmap(canvas_size.x,canvas_size.y,32);
+  }
   wxMemoryDC memDC(*adata.buffer);
+  memDC.SetBackground(*wxWHITE_BRUSH);
+  memDC.Clear();
   DrawBoard(memDC);
 
   // Now compute piece start position and translation vector
@@ -183,7 +175,7 @@ void BoardCanvas::Animate(const GameState &new_gs, const std::string &src, const
   adata.transVect.y=y-adata.src.y+centrer_offset;
 
   // Start animation:
-  adata.reuseBuffer=true;
+  adata.animate=true;
   int duration_backup=adata.duration;
   adata.duration=faster ? adata.duration_fast : adata.duration;
   int frame_duration=(1000/adata.fps);
@@ -201,7 +193,7 @@ void BoardCanvas::Animate(const GameState &new_gs, const std::string &src, const
     sw.Start(0);
   }
   adata.duration=faster ? duration_backup : duration_backup;
-  adata.reuseBuffer=false;
+  adata.animate=false;
   SetupBoard(new_gs);
 }
 

src/game_tab/left_panel/board/BoardCanvas.hpp

@@ -42,8 +42,8 @@ typedef std::tuple<short, short, short> ClockTime;
 typedef struct AnimState {
   /// @brief Temporary buffer to reduce latency
   wxBitmap *buffer;
-  /// @brief Should *buffer be used?
+  /// @brief Should animation be played on refresh?
-  bool reuseBuffer;
+  bool animate;
   /// @brief Current animated frame
   int frame;
   /// @brief Total number of frames for the animation