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Location: cpp/openttd-patchpack/source/src/widgets/dropdown.cpp - annotation
r9859:8c15dba58099
9.1 KiB
text/x-c
(svn r14004) -Codechange: Clean of drop down lists.
Move empty item drawing to base ListItem Draw() function.
Remove String() from base class.
Pass correct width to Draw().
Move empty item drawing to base ListItem Draw() function.
Remove String() from base class.
Pass correct width to Draw().
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r9189:27aa95601b1c r9189:27aa95601b1c r9189:27aa95601b1c r9189:27aa95601b1c r8284:d769847bf11d r8284:d769847bf11d r8284:d769847bf11d r8284:d769847bf11d r8284:d769847bf11d | /* $Id$ */
/** @file dropdown.cpp Implementation of the dropdown widget. */
#include "../stdafx.h"
#include "../openttd.h"
#include "../strings_type.h"
#include "../window_gui.h"
#include "../strings_func.h"
#include "../strings_type.h"
#include "../gfx_func.h"
#include "../window_func.h"
#include "../core/math_func.hpp"
#include "dropdown_type.h"
#include "dropdown_func.h"
#include "../table/sprites.h"
#include "table/strings.h"
void DropDownListItem::Draw(int x, int y, uint width, uint height, bool sel, int bg_colour) const
{
int c1 = _colour_gradient[bg_colour][3];
int c2 = _colour_gradient[bg_colour][7];
GfxFillRect(x + 1, y + 3, x + width - 2, y + 3, c1);
GfxFillRect(x + 1, y + 4, x + width - 2, y + 4, c2);
}
void DropDownListStringItem::Draw(int x, int y, uint width, uint height, bool sel, int bg_colour) const
{
DrawStringTruncated(x + 2, y, this->String(), sel ? TC_WHITE : TC_BLACK, width);
}
StringID DropDownListParamStringItem::String() const
{
for (uint i = 0; i < lengthof(this->decode_params); i++) SetDParam(i, this->decode_params[i]);
return this->string;
}
/**
* Delete all items of a drop down list and the list itself
* @param list List to delete.
*/
static void DeleteDropDownList(DropDownList *list)
{
for (DropDownList::iterator it = list->begin(); it != list->end(); ++it) {
DropDownListItem *item = *it;
delete item;
}
delete list;
}
static const Widget _dropdown_menu_widgets[] = {
{ WWT_PANEL, RESIZE_NONE, COLOUR_END, 0, 0, 0, 0, 0x0, STR_NULL},
{ WWT_SCROLLBAR, RESIZE_NONE, COLOUR_END, 0, 0, 0, 0, 0x0, STR_0190_SCROLL_BAR_SCROLLS_LIST},
{ WIDGETS_END},
};
struct DropdownWindow : Window {
WindowClass parent_wnd_class;
WindowNumber parent_wnd_num;
byte parent_button;
DropDownList *list;
int selected_index;
byte click_delay;
bool drag_mode;
int scrolling;
DropdownWindow(int x, int y, int width, int height, const Widget *widget) : Window(x, y, width, height, WC_DROPDOWN_MENU, widget)
{
this->FindWindowPlacementAndResize(width, height);
}
~DropdownWindow()
{
Window *w2 = FindWindowById(this->parent_wnd_class, this->parent_wnd_num);
if (w2 != NULL) {
w2->RaiseWidget(this->parent_button);
w2->InvalidateWidget(this->parent_button);
}
DeleteDropDownList(this->list);
}
bool GetDropDownItem(int &value)
{
if (GetWidgetFromPos(this, _cursor.pos.x - this->left, _cursor.pos.y - this->top) < 0) return false;
int y = _cursor.pos.y - this->top - 2;
int width = this->widget[0].right - 3;
int pos = this->vscroll.pos;
const DropDownList *list = this->list;
for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
/* Skip items that are scrolled up */
if (--pos >= 0) continue;
const DropDownListItem *item = *it;
int item_height = item->Height(width);
if (y < item_height) {
if (item->masked || !item->Selectable()) return false;
value = item->result;
return true;
}
y -= item_height;
}
return false;
}
virtual void OnPaint()
{
this->DrawWidgets();
int x = 1;
int y = 2;
int sel = this->selected_index;
int width = this->widget[0].right - 2;
int height = this->widget[0].bottom;
int pos = this->vscroll.pos;
DropDownList *list = this->list;
for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
const DropDownListItem *item = *it;
int item_height = item->Height(width);
/* Skip items that are scrolled up */
if (--pos >= 0) continue;
if (y + item_height < height) {
if (sel == item->result) GfxFillRect(x + 1, y, x + width - 1, y + item_height - 1, 0);
item->Draw(x, y, width, height, sel == item->result, (TextColour)this->widget[0].color);
if (item->masked) {
GfxFillRect(x, y, x + width - 1, y + item_height - 1,
_colour_gradient[this->widget[0].color][5], FILLRECT_CHECKER
);
}
}
y += item_height;
}
};
virtual void OnClick(Point pt, int widget)
{
if (widget != 0) return;
int item;
if (this->GetDropDownItem(item)) {
this->click_delay = 4;
this->selected_index = item;
this->SetDirty();
}
}
virtual void OnTick()
{
if (this->scrolling == -1) {
this->vscroll.pos = max(0, this->vscroll.pos - 1);
this->SetDirty();
} else if (this->scrolling == 1) {
this->vscroll.pos = min(this->vscroll.count - this->vscroll.cap, this->vscroll.pos + 1);
this->SetDirty();
}
this->scrolling = 0;
}
virtual void OnMouseLoop()
{
Window *w2 = FindWindowById(this->parent_wnd_class, this->parent_wnd_num);
if (w2 == NULL) {
delete this;
return;
}
if (this->click_delay != 0 && --this->click_delay == 0) {
w2->OnDropdownSelect(this->parent_button, this->selected_index);
delete this;
return;
}
if (this->drag_mode) {
int item;
if (!_left_button_clicked) {
this->drag_mode = false;
if (!this->GetDropDownItem(item)) return;
this->click_delay = 2;
} else {
if (_cursor.pos.y <= this->top + 2) {
/* Cursor is above the list, set scroll up */
this->scrolling = -1;
return;
} else if (_cursor.pos.y >= this->top + this->height - 2) {
/* Cursor is below list, set scroll down */
this->scrolling = 1;
return;
}
if (!this->GetDropDownItem(item)) return;
}
this->selected_index = item;
this->SetDirty();
}
}
};
void ShowDropDownList(Window *w, DropDownList *list, int selected, int button, uint width)
{
bool is_dropdown_menu_shown = w->IsWidgetLowered(button);
DeleteWindowById(WC_DROPDOWN_MENU, 0);
if (is_dropdown_menu_shown) {
DeleteDropDownList(list);
return;
}
w->LowerWidget(button);
w->InvalidateWidget(button);
/* Our parent's button widget is used to determine where to place the drop
* down list window. */
const Widget *wi = &w->widget[button];
/* The preferred position is just below the dropdown calling widget */
int top = w->top + wi->bottom + 1;
/* 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 */
Window *w3 = FindWindowById(WC_STATUS_BAR, 0);
int screen_bottom = w3 == NULL ? _screen.height : w3->top;
bool scroll = false;
/* Check if the dropdown will fully fit below the widget */
if (top + height + 4 >= screen_bottom) {
w3 = FindWindowById(WC_MAIN_TOOLBAR, 0);
int screen_top = w3 == NULL ? 0 : w3->top + w3->height;
/* If not, check if it will fit above the widget */
if (w->top + wi->top - height > screen_top) {
top = w->top + wi->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;
}
}
if (width == 0) width = wi->right - wi->left + 1;
DropdownWindow *dw = new DropdownWindow(
w->left + wi->left,
top,
width,
height + 4,
_dropdown_menu_widgets);
dw->widget[0].color = wi->color;
dw->widget[0].right = width - 1;
dw->widget[0].bottom = height + 3;
dw->SetWidgetHiddenState(1, !scroll);
if (scroll) {
/* We're scrolling, so enable the scroll bar and shrink the list by
* the scrollbar's width */
dw->widget[1].color = wi->color;
dw->widget[1].right = dw->widget[0].right;
dw->widget[1].left = dw->widget[1].right - 11;
dw->widget[1].bottom = dw->widget[0].bottom;
dw->widget[0].right -= 12;
/* Capacity is the average number of items visible */
dw->vscroll.cap = height * (uint16)list->size() / list_height;
dw->vscroll.count = (uint16)list->size();
}
dw->desc_flags = WDF_DEF_WIDGET;
dw->flags4 &= ~WF_WHITE_BORDER_MASK;
dw->parent_wnd_class = w->window_class;
dw->parent_wnd_num = w->window_number;
dw->parent_button = button;
dw->list = list;
dw->selected_index = selected;
dw->click_delay = 0;
dw->drag_mode = true;
}
void ShowDropDownMenu(Window *w, const StringID *strings, int selected, int button, uint32 disabled_mask, uint32 hidden_mask, uint width)
{
/* Don't create a new list if we're just closing an existing menu */
if (w->IsWidgetLowered(button)) {
DeleteWindowById(WC_DROPDOWN_MENU, 0);
return;
}
uint result = 0;
DropDownList *list = new DropDownList();
for (uint i = 0; strings[i] != INVALID_STRING_ID; i++) {
if (!HasBit(hidden_mask, i)) {
list->push_back(new DropDownListStringItem(strings[i], result, HasBit(disabled_mask, i)));
}
result++;
}
/* No entries in the list? */
if (list->size() == 0) {
DeleteDropDownList(list);
return;
}
ShowDropDownList(w, list, selected, button, width);
}
/**
* Delete the drop-down menu from window \a pw
* @param pw Parent window of the drop-down menu window
*/
void HideDropDownMenu(Window *pw)
{
Window **wz;
FOR_ALL_WINDOWS(wz) {
if ((*wz)->window_class != WC_DROPDOWN_MENU) continue;
DropdownWindow *dw = dynamic_cast<DropdownWindow*>(*wz);
if (pw->window_class == dw->parent_wnd_class &&
pw->window_number == dw->parent_wnd_num) {
delete dw;
break;
}
}
}
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