/**
* Show a drop down list.
* @param w Parent window for the list.
* @param list Prepopulated DropDownList. Will be deleted when the list is
* closed.
* @param selected The initially selected list item.
* @param button The widget which is passed to Window::OnDropdownSelect and OnDropdownClose.
* Unless you override those functions, this should be then widget index of the dropdown button.
* @param wi_rect Coord of the parent drop down button, used to position the dropdown menu.
* @param auto_width The width is determined by the widest item in the list,
* in this case only one of \a left or \a right is used (depending on text direction).
* @param instant_close Set to true if releasing mouse button should close the
* list regardless of where the cursor is.
*/
void ShowDropDownListAt(Window *w, DropDownList *list, int selected, int button, Rect wi_rect, Colours wi_colour, bool auto_width, bool instant_close)
{
DeleteWindowById(WC_DROPDOWN_MENU, 0);
/* The preferred position is just below the dropdown calling widget */
int top = w->top + wi_rect.bottom + 1;
/* The preferred width equals the calling widget */
uint width = wi_rect.right - wi_rect.left + 1;
uint max_item_width = 0;
if (auto_width) {
/* Find the longest item in the list */
for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
const DropDownListItem *item = *it;
max_item_width = max(max_item_width, item->Width() + 5);
}
}
/* Total length of list */
int list_height = 0;
for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
DropDownListItem *item = *it;
list_height += item->Height(width);
}
/* Height of window visible */
int height = list_height;
/* Check if the status bar is visible, as we don't want to draw over it */
int screen_bottom = GetMainViewBottom();
bool scroll = false;
/* Check if the dropdown will fully fit below the widget */
if (top + height + 4 >= screen_bottom) {
/* If not, check if it will fit above the widget */
if (w->top + wi_rect.top - height > GetMainViewTop()) {
top = w->top + wi_rect.top - height - 4;
} else {
/* ... and lastly if it won't, enable the scroll bar and fit the
* list in below the widget */
int avg_height = list_height / (int)list->size();
int rows = (screen_bottom - 4 - top) / avg_height;
height = rows * avg_height;
scroll = true;
/* Add space for the scroll bar if we automatically determined
* the width of the list. */
max_item_width += NWidgetScrollbar::GetVerticalDimension().width;
}
}
if (auto_width) width = max(width, max_item_width);
Point dw_pos = { w->left + (_current_text_dir == TD_RTL ? wi_rect.right + 1 - width : wi_rect.left), top};
Dimension dw_size = {width, height};
new DropdownWindow(w, list, selected, button, instant_close, dw_pos, dw_size, wi_colour, scroll);
}
}
}
}
virtual Point OnInitialPosition(int16 sm_width, int16 sm_height, int window_number)
{
/* Position (0, 0) given, center the window. */
if (this->position.x == 0 && this->position.y == 0) {
Point pt = {(_screen.width - sm_width) >> 1, (_screen.height - sm_height) >> 1};
return pt;
}
/* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
* Add a fixed distance 20 to make it less cluttered.
*/
int scr_top = GetMainViewTop() + 20;
int scr_bot = GetMainViewBottom() - 20;
Point pt = RemapCoords2(this->position.x, this->position.y);
const ViewPort *vp = FindWindowById(WC_MAIN_WINDOW, 0)->viewport;
if (this->face == INVALID_COMPANY) {
/* move x pos to opposite corner */
pt.x = UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left;
pt.x = (pt.x < (_screen.width >> 1)) ? _screen.width - sm_width - 20 : 20; // Stay 20 pixels away from the edge of the screen.
/* move y pos to opposite corner */
pt.y = UnScaleByZoom(pt.y - vp->virtual_top, vp->zoom) + vp->top;
pt.y = (pt.y < (_screen.height >> 1)) ? scr_bot - sm_height : scr_top;
} else {
pt.x = Clamp(UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left - (sm_width / 2), 0, _screen.width - sm_width);
pt.y = Clamp(UnScaleByZoom(pt.y - vp->virtual_top, vp->zoom) + vp->top - (sm_height / 2), scr_top, scr_bot - sm_height);
void ShowDropDownList(Window *w, DropDownList *list, int selected, int button, uint width, bool auto_width, bool instant_close)
{
DeleteWindowById(WC_DROPDOWN_MENU, 0);
/* Our parent's button widget is used to determine where to place the drop
* down list window. */
Rect wi_rect;
Colours wi_colour;
NWidgetCore *nwi = w->GetWidget<NWidgetCore>(button);
wi_rect.left = nwi->pos_x;
wi_rect.right = nwi->pos_x + nwi->current_x - 1;
wi_rect.top = nwi->pos_y;
wi_rect.bottom = nwi->pos_y + nwi->current_y - 1;
wi_colour = nwi->colour;
if (nwi->type == NWID_BUTTON_DROPDOWN) {
nwi->disp_flags |= ND_DROPDOWN_ACTIVE;
} else {
w->LowerWidget(button);
}
w->SetWidgetDirty(button);
/* The preferred position is just below the dropdown calling widget */
int top = w->top + wi_rect.bottom + 1;
if (width == 0) width = wi_rect.right - wi_rect.left + 1;
uint max_item_width = 0;
if (auto_width) {
/* Find the longest item in the list */
for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
const DropDownListItem *item = *it;
max_item_width = max(max_item_width, item->Width() + 5);
}
}
/* Total length of list */
int list_height = 0;
for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
DropDownListItem *item = *it;
list_height += item->Height(width);
}
/* Height of window visible */
int height = list_height;
/* Check if the status bar is visible, as we don't want to draw over it */
int screen_bottom = GetMainViewBottom();
bool scroll = false;
/* Check if the dropdown will fully fit below the widget */
if (top + height + 4 >= screen_bottom) {
/* If not, check if it will fit above the widget */
if (w->top + wi_rect.top - height > GetMainViewTop()) {
top = w->top + wi_rect.top - height - 4;
} else {
/* ... and lastly if it won't, enable the scroll bar and fit the
* list in below the widget */
int avg_height = list_height / (int)list->size();
int rows = (screen_bottom - 4 - top) / avg_height;
height = rows * avg_height;
scroll = true;
/* Add space for the scroll bar if we automatically determined
* the width of the list. */
max_item_width += WD_VSCROLLBAR_WIDTH;
}
}
if (auto_width) width = max(width, max_item_width);
Point dw_pos = { w->left + (_current_text_dir == TD_RTL ? wi_rect.right + 1 - width : wi_rect.left), top};
Dimension dw_size = {width, height};
new DropdownWindow(w, list, selected, button, instant_close, dw_pos, dw_size, wi_colour, scroll);
}
/**
* Show a drop down list.
* @param w Parent window for the list.
* @param list Prepopulated DropDownList. Will be deleted when the list is
* closed.
* @param selected The initially selected list item.
* @param button The widget which is passed to Window::OnDropdownSelect and OnDropdownClose.
* Unless you override those functions, this should be then widget index of the dropdown button.
* @param wi_rect Coord of the parent drop down button, used to position the dropdown menu.
* @param auto_width The width is determined by the widest item in the list,
* in this case only one of \a left or \a right is used (depending on text direction).
* @param instant_close Set to true if releasing mouse button should close the
* list regardless of where the cursor is.
*/
void ShowDropDownListAt(Window *w, const DropDownList *list, int selected, int button, Rect wi_rect, Colours wi_colour, bool auto_width, bool instant_close)
{
DeleteWindowById(WC_DROPDOWN_MENU, 0);
/* The preferred position is just below the dropdown calling widget */
int top = w->top + wi_rect.bottom + 1;
/* The preferred width equals the calling widget */
uint width = wi_rect.right - wi_rect.left + 1;
/* Longest item in the list, if auto_width is enabled */
uint max_item_width = 0;
/* Total length of list */
int height = 0;
for (const DropDownListItem * const *it = list->Begin(); it != list->End(); ++it) {
const DropDownListItem *item = *it;
height += item->Height(width);
if (auto_width) max_item_width = max(max_item_width, item->Width() + 5);
}
/* Check if the status bar is visible, as we don't want to draw over it */
int screen_bottom = GetMainViewBottom();
bool scroll = false;
enum { DISPLAY_BORDER = 20, TOP_BORDER = 4 };
/* Check if the dropdown will fully fit below the widget */
if (top + height + DISPLAY_BORDER >= screen_bottom) {
/* If not, check if it will fit above the widget */
int screen_top = GetMainViewTop();
if (w->top + wi_rect.top - TOP_BORDER > screen_top + height) {
top = w->top + wi_rect.top - height - TOP_BORDER;
} else {
/* If it doesn't fit above the widget, we need to enable a scrollbar... */
int avg_height = height / (int)list->Length();
scroll = true;
/* ... and choose whether to put the list above or below the widget. */
bool put_above = false;
int available_height = screen_bottom - w->top - wi_rect.bottom;
if (w->top + wi_rect.top - screen_top > available_height) {
// Put it above.
available_height = w->top + wi_rect.top - screen_top - DISPLAY_BORDER - TOP_BORDER;
put_above = true;
}
/* Check at least there is space for one item. */
assert(available_height >= avg_height);
/* ... and lastly if it won't, enable the scroll bar and fit the
* list in below the widget */
int rows = available_height / avg_height;
height = rows * avg_height;
scroll = true;
/* Add space for the scroll bar if we automatically determined
* the width of the list. */
max_item_width += NWidgetScrollbar::GetVerticalDimension().width;
/* ... and set the top position if needed. */
if (put_above) {
top = w->top + wi_rect.top - height - TOP_BORDER;
}
}
}
if (auto_width) width = max(width, max_item_width);
Point dw_pos = { w->left + (_current_text_dir == TD_RTL ? wi_rect.right + 1 - (int)width : wi_rect.left), top};
Dimension dw_size = {width, (uint)height};
new DropdownWindow(w, list, selected, button, instant_close, dw_pos, dw_size, wi_colour, scroll);
}
/**
* Show a drop down list.
* @param w Parent window for the list.
* @param list Prepopulated DropDownList. Will be deleted when the list is
* closed.
* @param selected The initially selected list item.
* @param button The widget which is passed to Window::OnDropdownSelect and OnDropdownClose.
* Unless you override those functions, this should be then widget index of the dropdown button.
* @param wi_rect Coord of the parent drop down button, used to position the dropdown menu.
* @param auto_width The width is determined by the widest item in the list,
* in this case only one of \a left or \a right is used (depending on text direction).
* @param instant_close Set to true if releasing mouse button should close the
* list regardless of where the cursor is.
*/
void ShowDropDownListAt(Window *w, const DropDownList *list, int selected, int button, Rect wi_rect, Colours wi_colour, bool auto_width, bool instant_close)
{
DeleteWindowById(WC_DROPDOWN_MENU, 0);
/* The preferred position is just below the dropdown calling widget */
int top = w->top + wi_rect.bottom + 1;
/* The preferred width equals the calling widget */
uint width = wi_rect.right - wi_rect.left + 1;
/* Longest item in the list, if auto_width is enabled */
uint max_item_width = 0;
/* Total height of list */
uint height = 0;
for (const DropDownListItem * const *it = list->Begin(); it != list->End(); ++it) {
const DropDownListItem *item = *it;
height += item->Height(width);
if (auto_width) max_item_width = max(max_item_width, item->Width() + 5);
}
/* Scrollbar needed? */
bool scroll = false;
/* Is it better to place the dropdown above the widget? */
bool above = false;
/* Available height below (or above, if the dropdown is placed above the widget). */
uint available_height = (uint)max(GetMainViewBottom() - top - 4, 0);
/* If the dropdown doesn't fully fit below the widget... */
if (height > available_height) {
uint available_height_above = (uint)max(w->top + wi_rect.top - GetMainViewTop() - 4, 0);
/* Put the dropdown above if there is more available space. */
if (available_height_above > available_height) {
above = true;
available_height = available_height_above;
}
/* If the dropdown doesn't fully fit, we need a dropdown. */
if (height > available_height) {
scroll = true;
uint avg_height = height / list->Length();
/* Check at least there is space for one item. */
assert(available_height >= avg_height);
/* Fit the list. */
uint rows = available_height / avg_height;
height = rows * avg_height;
/* Add space for the scrollbar. */
max_item_width += NWidgetScrollbar::GetVerticalDimension().width;
}
/* Set the top position if needed. */
if (above) {
top = w->top + wi_rect.top - height - 4;
}
}
if (auto_width) width = max(width, max_item_width);
Point dw_pos = { w->left + (_current_text_dir == TD_RTL ? wi_rect.right + 1 - (int)width : wi_rect.left), top};
Dimension dw_size = {width, height};
DropdownWindow *dropdown = new DropdownWindow(w, list, selected, button, instant_close, dw_pos, dw_size, wi_colour, scroll);
/* The dropdown starts scrolling downwards when opening it towards
* the top and holding down the mouse button. It can be fooled by
* opening the dropdown scrolled to the very bottom. */
if (above && scroll) dropdown->vscroll->UpdatePosition(INT_MAX);
}
