// Calculate one step and max corrections
double calculation(const int iterate) {
// Vt + Vr + Vb + Vl - 4Vx = 0
int y, x;
double maxStepSize, pde, stepSize;
d("Calculation step (iterate: %d)", iterate);
maxStepSize = 0;
for (y = 1; y < segment_size_y - 1; ++y) {
for (x = 1; x < segment_size_x - 1; ++x) {
// We're using checkerboard to calculate values.
if ((y + x + iterate) % 2 == 0
|| is_outside(x, y)
|| is_wire(x, y)
) {
continue;
}
pde = data[bottom_point(x, y)]
+ data[top_point(x, y)]
+ data[left_point(x, y)]
+ data[right_point(x, y)];
pde *= .25;
stepSize = abs(pde - data[y * segment_size_x + x]);
if (stepSize > maxStepSize) {
maxStepSize = stepSize;
}
data[y * segment_size_x + x] = pde;
}
}
return maxStepSize;
}
void ComboBox::Paint(Canvas& canvas, const Rect& dirty_rect) {
__super::Paint(canvas, dirty_rect);
float button_width = GetDropDownButtonWidth();
auto button_rect = GetContentRect();
button_rect.position.x = button_rect.position.x + button_rect.size.width - button_width;
button_rect.size.width = button_width;
float top_edge_length = button_width / 2;
if (top_edge_length / 2 > button_rect.size.height / 2) {
top_edge_length = button_rect.size.height / 2;
}
float height = top_edge_length / 2;
float half_height = height / 2;
Point center_point(
button_rect.position.x + button_rect.size.width / 2,
button_rect.position.y + button_rect.size.height / 2);
Point left_point(center_point.x - height, center_point.y - half_height);
left_point = MakeClearEdgePointForFill(left_point, ClearEdgeOption::Clear);
Point right_point(center_point.x + height, center_point.y - half_height);
right_point = MakeClearEdgePointForFill(right_point, ClearEdgeOption::Clear);
Point bottom_point(center_point.x, center_point.y + half_height);
bottom_point = MakeClearEdgePointForFill(bottom_point, ClearEdgeOption::Clear);
auto path = GetApplication().GetResourceFactory()->CreatePathGeometry();
if (path == nullptr) {
return;
}
auto sink = path->Open();
if (sink == nullptr) {
return;
}
sink->BeginFigure(left_point, GeometrySink::BeginFigureOption::Fill);
sink->AddLine(right_point);
sink->AddLine(bottom_point);
sink->EndFigure(GeometrySink::EndFigureOption::Close);
sink->Close();
Canvas::StateGuard state_guard(canvas);
canvas.SetBrushWithColor(GetDropDownButtonColor());
canvas.DrawGeometry(path);
}