/**
* Based on (heavily changed)
* rct2: 0x006E9E0E, 0x006E9ED0
*/
static void input_scroll_drag_continue(int x, int y, rct_window* w)
{
rct_widgetindex widgetIndex = _dragWidget.widget_index;
uint8 scrollIndex = _dragScrollIndex;
rct_widget* widget = &w->widgets[widgetIndex];
rct_scroll* scroll = &w->scrolls[scrollIndex];
int dx, dy;
dx = x - gInputDragLastX;
dy = y - gInputDragLastY;
if (scroll->flags & HSCROLLBAR_VISIBLE) {
sint16 size = widget->right - widget->left - 1;
if (scroll->flags & VSCROLLBAR_VISIBLE)
size -= 11;
size = max(0, scroll->h_right - size);
scroll->h_left = min(max(0, scroll->h_left + dx), size);
}
if (scroll->flags & VSCROLLBAR_VISIBLE) {
sint16 size = widget->bottom - widget->top - 1;
if (scroll->flags & HSCROLLBAR_VISIBLE)
size -= 11;
size = max(0, scroll->v_bottom - size);
scroll->v_top = min(max(0, scroll->v_top + dy), size);
}
widget_scroll_update_thumbs(w, widgetIndex);
window_invalidate_by_number(w->classification, w->number);
platform_set_cursor_position(gInputDragLastX, gInputDragLastY);
}
/**
*
* rct2: 0x006E876D
*/
void invalidate_scroll()
{
rct_window* w = window_find_by_number(gPressedWidget.window_classification, gPressedWidget.window_number);
if (w != NULL) {
// Reset to basic scroll
w->scrolls[_currentScrollIndex].flags &= 0xFF11;
window_invalidate_by_number(gPressedWidget.window_classification, gPressedWidget.window_number);
}
}
static void input_scroll_begin(rct_window *w, rct_widgetindex widgetIndex, sint32 x, sint32 y)
{
rct_widget *widget;
widget = &w->widgets[widgetIndex];
_inputState = INPUT_STATE_SCROLL_LEFT;
gPressedWidget.window_classification = w->classification;
gPressedWidget.window_number = w->number;
gPressedWidget.widget_index = widgetIndex;
gTooltipCursorX = x;
gTooltipCursorY = y;
sint32 eax, ebx, scroll_area, scroll_id;
scroll_id = 0; // safety
widget_scroll_get_part(w, widget, x, y, &eax, &ebx, &scroll_area, &scroll_id);
_currentScrollArea = scroll_area;
_currentScrollIndex = scroll_id;
window_event_unknown_15_call(w, scroll_id, scroll_area);
if (scroll_area == SCROLL_PART_VIEW){
window_event_scroll_mousedown_call(w, scroll_id, eax, ebx);
return;
}
rct_widget* widg = &w->widgets[widgetIndex];
rct_scroll* scroll = &w->scrolls[scroll_id];
sint32 widget_width = widg->right - widg->left - 1;
if (scroll->flags & VSCROLLBAR_VISIBLE)
widget_width -= 11;
sint32 widget_content_width = max(scroll->h_right - widget_width, 0);
sint32 widget_height = widg->bottom - widg->top - 1;
if (scroll->flags & HSCROLLBAR_VISIBLE)
widget_height -= 11;
sint32 widget_content_height = max(scroll->v_bottom - widget_height, 0);
switch (scroll_area) {
case SCROLL_PART_HSCROLLBAR_LEFT:
scroll->h_left = max(scroll->h_left - 3, 0);
break;
case SCROLL_PART_HSCROLLBAR_RIGHT:
scroll->h_left = min(scroll->h_left + 3, widget_content_width);
break;
case SCROLL_PART_HSCROLLBAR_LEFT_TROUGH:
scroll->h_left = max(scroll->h_left - widget_width, 0);
break;
case SCROLL_PART_HSCROLLBAR_RIGHT_TROUGH:
scroll->h_left = min(scroll->h_left + widget_width, widget_content_width);
break;
case SCROLL_PART_VSCROLLBAR_TOP:
scroll->v_top = max(scroll->v_top - 3, 0);
break;
case SCROLL_PART_VSCROLLBAR_BOTTOM:
scroll->v_top = min(scroll->v_top + 3, widget_content_height);
break;
case SCROLL_PART_VSCROLLBAR_TOP_TROUGH:
scroll->v_top = max(scroll->v_top - widget_height, 0);
break;
case SCROLL_PART_VSCROLLBAR_BOTTOM_TROUGH:
scroll->v_top = min(scroll->v_top + widget_height, widget_content_height);
break;
default:
break;
}
widget_scroll_update_thumbs(w, widgetIndex);
window_invalidate_by_number(widgetIndex, w->classification);
}
