TO_ROW::TO_ROW ( //constructor
BLOBNBOX * blob, //first blob
float top, //corrected top
float bottom, //of row
float row_size //ideal
) {
clear();
y_min = bottom;
y_max = top;
initial_y_min = bottom;
float diff; //in size
BLOBNBOX_IT it = &blobs; //list of blobs
it.add_to_end (blob);
diff = top - bottom - row_size;
if (diff > 0) {
y_max -= diff / 2;
y_min += diff / 2;
}
//very small object
else if ((top - bottom) * 3 < row_size) {
diff = row_size / 3 + bottom - top;
y_max += diff / 2;
y_min -= diff / 2;
}
}
void TO_ROW::add_blob( //constructor
BLOBNBOX *blob, //first blob
float top, //corrected top
float bottom, //of row
float row_size //ideal
) {
float allowed; //allowed expansion
float available; //expansion
BLOBNBOX_IT it = &blobs; //list of blobs
it.add_to_end (blob);
allowed = row_size + y_min - y_max;
if (allowed > 0) {
available = top > y_max ? top - y_max : 0;
if (bottom < y_min)
//total available
available += y_min - bottom;
if (available > 0) {
available += available; //do it gradually
if (available < allowed)
available = allowed;
if (bottom < y_min)
y_min -= (y_min - bottom) * allowed / available;
if (top > y_max)
y_max += (top - y_max) * allowed / available;
}
}
}
void plot_to_row( //draw a row
TO_ROW *row, //row to draw
ScrollView::Color colour, //colour to draw in
FCOORD rotation //rotation for line
) {
FCOORD plot_pt; //point to plot
//blobs
BLOBNBOX_IT it = row->blob_list();
float left, right; //end of row
if (it.empty()) {
tprintf("No blobs in row at %g\n", row->parallel_c());
return;
}
left = it.data()->bounding_box().left();
it.move_to_last();
right = it.data()->bounding_box().right();
plot_blob_list(to_win, row->blob_list(), colour, ScrollView::BROWN);
to_win->Pen(colour);
plot_pt = FCOORD(left, row->line_m() * left + row->line_c());
plot_pt.rotate(rotation);
to_win->SetCursor(plot_pt.x(), plot_pt.y());
plot_pt = FCOORD(right, row->line_m() * right + row->line_c());
plot_pt.rotate(rotation);
to_win->DrawTo(plot_pt.x(), plot_pt.y());
}
void plot_parallel_row( //draw a row
TO_ROW *row, //row to draw
float gradient, //gradients of lines
inT32 left, //edge of block
ScrollView::Color colour, //colour to draw in
FCOORD rotation //rotation for line
) {
FCOORD plot_pt; //point to plot
//blobs
BLOBNBOX_IT it = row->blob_list();
float fleft = (float) left; //floating version
float right; //end of row
// left=it.data()->bounding_box().left();
it.move_to_last();
right = it.data()->bounding_box().right();
plot_blob_list(to_win, row->blob_list(), colour, ScrollView::BROWN);
to_win->Pen(colour);
plot_pt = FCOORD(fleft, gradient * left + row->max_y());
plot_pt.rotate(rotation);
to_win->SetCursor(plot_pt.x(), plot_pt.y());
plot_pt = FCOORD(fleft, gradient * left + row->min_y());
plot_pt.rotate(rotation);
to_win->DrawTo(plot_pt.x(), plot_pt.y());
plot_pt = FCOORD(fleft, gradient * left + row->parallel_c());
plot_pt.rotate(rotation);
to_win->SetCursor(plot_pt.x(), plot_pt.y());
plot_pt = FCOORD(right, gradient * right + row->parallel_c());
plot_pt.rotate(rotation);
to_win->DrawTo(plot_pt.x(), plot_pt.y());
}
void plot_blob_list(ScrollView* win, // window to draw in
BLOBNBOX_LIST *list, // blob list
ScrollView::Color body_colour, // colour to draw
ScrollView::Color child_colour) { // colour of child
BLOBNBOX_IT it = list;
for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
it.data()->plot(win, body_colour, child_colour);
}
}
static void clear_blobnboxes(BLOBNBOX_LIST* boxes) {
BLOBNBOX_IT it = boxes;
// A BLOBNBOX generally doesn't own its blobs, so if they do, you
// have to delete them explicitly.
for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
BLOBNBOX* box = it.data();
delete box->cblob();
}
}
void plot_box_list( //make gradients win
ScrollView *win, //window to draw in
BLOBNBOX_LIST *list, //blob list
ScrollView::Color body_colour //colour to draw
) {
BLOBNBOX_IT it = list; //iterator
win->Pen(body_colour);
win->Brush(ScrollView::NONE);
for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
it.data()->bounding_box().plot(win);
}
}
void TO_ROW::insert_blob( //constructor
BLOBNBOX *blob //first blob
) {
BLOBNBOX_IT it = &blobs; //list of blobs
if (it.empty ())
it.add_before_then_move (blob);
else {
it.mark_cycle_pt ();
while (!it.cycled_list ()
&& it.data ()->bounding_box ().left () <=
blob->bounding_box ().left ())
it.forward ();
if (it.cycled_list ())
it.add_to_end (blob);
else
it.add_before_stay_put (blob);
}
}
