void tscrollbar_container::scrollbar_moved()
{
// Init.
assert(content_ && content_grid_);
assert(vertical_scrollbar_ && horizontal_scrollbar_);
/*** Update the content location. ***/
const int x_offset = horizontal_scrollbar_mode_ == always_invisible
? 0
: horizontal_scrollbar_->get_item_position()
* horizontal_scrollbar_->get_step_size();
const int y_offset = vertical_scrollbar_mode_ == always_invisible
? 0
: vertical_scrollbar_->get_item_position()
* vertical_scrollbar_->get_step_size();
const tpoint content_origin = {content_->get_x() - x_offset, content_->get_y() - y_offset};
content_grid_->set_origin(content_origin);
content_grid_->set_visible_rectangle(content_visible_area_);
content_grid_->set_is_dirty(true);
// Update scrollbar.
set_scrollbar_button_status();
}
bool tscrollbar_container::content_resize_request(
const int width_modification
, const int height_modification)
{
DBG_GUI_L << LOG_HEADER
<< " wanted width modification " << width_modification
<< " wanted height modification " << height_modification
<< ".\n";
if(get_size() == tpoint(0, 0)) {
DBG_GUI_L << LOG_HEADER
<< " initial setup not done, bailing out.\n";
return false;
}
twindow* window = get_window();
assert(window);
if(window->get_need_layout()) {
DBG_GUI_L << LOG_HEADER
<< " window already needs a layout phase, bailing out.\n";
return false;
}
assert(content_ && content_grid_);
const bool result = content_resize_width(width_modification)
&& content_resize_height(height_modification);
if(result) {
/*
* The subroutines set the new size of the scrollbar but don't
* update the button status.
*/
set_scrollbar_button_status();
}
DBG_GUI_L << LOG_HEADER << " result " << result << ".\n";
return result;
}
void tscrollbar_container::place(const tpoint& origin, const tpoint& size)
{
// Inherited.
tcontainer_::place(origin, size);
// Set content size
assert(content_ && content_grid_);
const tpoint content_origin = content_->get_origin();
const tpoint best_size = content_grid_->get_best_size();
const tpoint content_size(content_->get_width(), content_->get_height());
const tpoint content_grid_size(std::max(best_size.x, content_size.x),
std::max(best_size.y, content_size.y));
set_content_size(content_origin, content_grid_size);
// Set vertical scrollbar
set_scrollbar_mode(vertical_scrollbar_grid_,
vertical_scrollbar_,
vertical_scrollbar_mode_,
content_grid_->get_height(),
content_->get_height());
// Set horizontal scrollbar
set_scrollbar_mode(horizontal_scrollbar_grid_,
horizontal_scrollbar_,
horizontal_scrollbar_mode_,
content_grid_->get_width(),
content_->get_width());
// Update the buttons.
set_scrollbar_button_status();
// Now set the visible part of the content.
content_visible_area_ = content_->get_rectangle();
content_grid_->set_visible_rectangle(content_visible_area_);
}
