// -----------------------------------------------------------------------------
// Called when the mouse pointer is moved within the canvas
// -----------------------------------------------------------------------------
void GfxCanvas::onMouseMovement(wxMouseEvent& e)
{
bool refresh = false;
// Check if the mouse is over the image
int x = e.GetPosition().x;
int y = e.GetPosition().y - 2;
bool on_image = onImage(x, y);
cursor_pos_ = imageCoords(x, y);
if (on_image && editing_mode_ != EditMode::None)
{
if (cursor_pos_ != prev_pos_)
generateBrushShadow();
prev_pos_ = cursor_pos_;
}
if (on_image != image_hilight_)
{
image_hilight_ = on_image;
refresh = true;
// Update cursor if drag allowed
if (on_image)
{
if (editing_mode_ != EditMode::None)
SetCursor(wxCursor(wxCURSOR_PENCIL));
else if (allow_drag_)
SetCursor(wxCursor(wxCURSOR_SIZING));
}
else if (allow_drag_ && !e.LeftIsDown())
SetCursor(wxNullCursor);
}
// Drag
if (e.LeftIsDown())
{
if (editing_mode_ != EditMode::None)
{
brushCanvas(x, y);
}
else
{
drag_pos_.set(e.GetPosition().x, e.GetPosition().y);
refresh = true;
}
}
else if (e.MiddleIsDown())
{
offset_ = offset_ + Vec2d(e.GetPosition().x - mouse_prev_.x, e.GetPosition().y - mouse_prev_.y);
refresh = true;
}
// Right mouse down
if (e.RightIsDown() && on_image)
pickColour(x, y);
if (refresh)
Refresh();
mouse_prev_.set(e.GetPosition().x, e.GetPosition().y);
}
/* GfxCanvas::brushCanvas
* Finds all the pixels under the brush, and paints them.
*******************************************************************/
void GfxCanvas::brushCanvas(int x, int y)
{
if (brush == nullptr) return;
point2_t coord = imageCoords(x, y);
for (int i = -4; i < 5; ++i)
for (int j = -4; j < 5; ++j)
if (brush->getPixel(i, j))
paintPixel(coord.x + i, coord.y + j);
}
// -----------------------------------------------------------------------------
// Returns true if the given coordinates are 'on' top of the image
// -----------------------------------------------------------------------------
bool GfxCanvas::onImage(int x, int y)
{
// Don't disable in editing mode; it can be quite useful
// to have a live preview of how a graphic will tile.
if (view_type_ == View::Tiled && editing_mode_ == EditMode::None)
return false;
// No need to duplicate the imageCoords code.
return imageCoords(x, y) != Vec2i{ -1, -1 };
}
/* GfxCanvas::onImage
* Returns true if the given coordinates are 'on' top of the image
*******************************************************************/
bool GfxCanvas::onImage(int x, int y)
{
// Don't disable in editing mode; it can be quite useful
// to have a live preview of how a graphic will tile.
if (view_type == GFXVIEW_TILED && editing_mode == 0)
return false;
// No need to duplicate the imageCoords code.
return imageCoords(x, y) != POINT_OUTSIDE;
}
// -----------------------------------------------------------------------------
// Finds the pixel under the cursor, and picks its colour.
// -----------------------------------------------------------------------------
void GfxCanvas::pickColour(int x, int y)
{
// Get the pixel
auto coord = imageCoords(x, y);
// Pick its colour
paint_colour_ = image_.pixelAt(coord.x, coord.y, &palette_);
// Announce it triumphantly to the world
wxNotifyEvent e(wxEVT_GFXCANVAS_COLOUR_PICKED, GetId());
e.SetEventObject(this);
GetEventHandler()->ProcessEvent(e);
}