void slider::draw_contents()
{
surface image(state_ != NORMAL ? highlightedImage_ : image_);
if (image == NULL)
return;
SDL_Color line_color = font::NORMAL_COLOR;
if (!enabled()) {
image = greyscale_image(image);
line_color = font::DISABLED_COLOR;
}
SDL_Rect const &loc = location();
if (image->w >= loc.w)
return;
surface screen = video().getSurface();
SDL_Rect line_rect = create_rect(loc.x + image->w / 2
, loc.y + loc.h / 2
, loc.w - image->w
, 1);
sdl_fill_rect(screen, &line_rect, SDL_MapRGB(screen->format,
line_color.r, line_color.g, line_color.b));
SDL_Rect const &slider = slider_area();
video().blit_surface(slider.x, slider.y, image);
}
void slider::mouse_down(const SDL_MouseButtonEvent& event)
{
bool prev_change = value_change_;
if (!sdl::point_in_rect(event.x, event.y, location()))
return;
if (event.button != SDL_BUTTON_LEFT)
return;
state_ = CLICKED;
set_focus(true);
if (sdl::point_in_rect(event.x, event.y, slider_area())) {
sound::play_UI_sound(game_config::sounds::button_press);
} else {
value_change_ = false;
set_slider_position(event.x);
if(value_change_) {
sound::play_UI_sound(game_config::sounds::slider_adjust);
} else {
value_change_ = prev_change;
}
}
}
void slider::handle_event(const SDL_Event& event)
{
gui::widget::handle_event(event);
if (!enabled() || hidden())
return;
STATE start_state = state_;
switch(event.type) {
case SDL_MOUSEBUTTONUP:
if (!mouse_locked()) {
bool on = sdl::point_in_rect(event.button.x, event.button.y, slider_area());
state_ = on ? ACTIVE : NORMAL;
}
break;
case SDL_MOUSEBUTTONDOWN:
if (!mouse_locked())
mouse_down(event.button);
break;
case SDL_MOUSEMOTION:
if (!mouse_locked())
mouse_motion(event.motion);
break;
case SDL_KEYDOWN:
if(focus(&event) && allow_key_events()) { //allow_key_events is used by zoom_sliders to disable left-right key press, which is buggy for them
const SDL_Keysym& key = reinterpret_cast<const SDL_KeyboardEvent&>(event).keysym;
const int c = key.sym;
if(c == SDLK_LEFT) {
sound::play_UI_sound(game_config::sounds::slider_adjust);
set_value(value_ - increment_);
} else if(c == SDLK_RIGHT) {
sound::play_UI_sound(game_config::sounds::slider_adjust);
set_value(value_ + increment_);
}
}
break;
case SDL_MOUSEWHEEL:
if (!mouse_locked())
mouse_wheel(event.wheel);
break;
default:
return;
}
if (start_state != state_)
set_dirty(true);
}
void slider::mouse_motion(const SDL_MouseMotionEvent& event)
{
if (state_ == NORMAL || state_ == ACTIVE) {
bool on = point_in_rect(event.x, event.y, slider_area());
state_ = on ? ACTIVE : NORMAL;
} else if (state_ == CLICKED || state_ == DRAGGED) {
state_ = DRAGGED;
bool prev_change = value_change_;
value_change_ = false;
set_slider_position(event.x);
if(value_change_) {
sound::play_UI_sound(game_config::sounds::slider_adjust);
} else {
value_change_ = prev_change;
}
}
}
void slider::draw_contents()
{
surface image;
switch (state_) {
case NORMAL:
image.assign(image_);
break;
case ACTIVE:
image.assign(activeImage_);
break;
default:
image.assign(pressedImage_);
break;
}
assert(image != nullptr);
color_t line_color = line_color_;
if (!enabled()) {
image.assign(disabledImage_);
line_color = font::DISABLED_COLOR;
}
SDL_Rect const &loc = location();
if (image->w >= loc.w)
return;
surface& screen = video().getSurface();
SDL_Rect line_rect = sdl::create_rect(loc.x + image->w / 2
, loc.y + loc.h / 2
, loc.w - image->w
, 1);
sdl::fill_rect(screen, &line_rect, SDL_MapRGB(screen->format,
line_color.r, line_color.g, line_color.b));
SDL_Rect const &slider = slider_area();
video().blit_surface(slider.x, slider.y, image);
}
