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menu.cpp
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// Aseprite UI Library
// Copyright (C) 2018-2020 Igara Studio S.A.
// Copyright (C) 2001-2018 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ui/menu.h"
#include "base/clamp.h"
#include "gfx/size.h"
#include "os/font.h"
#include "ui/intern.h"
#include "ui/ui.h"
#include <algorithm>
#include <cctype>
#include <memory>
static const int kTimeoutToOpenSubmenu = 250;
namespace ui {
using namespace gfx;
//////////////////////////////////////////////////////////////////////
// Internal messages: to move between menus
RegisterMessage kOpenMenuItemMessage;
RegisterMessage kCloseMenuItemMessage;
RegisterMessage kClosePopupMessage;
RegisterMessage kExecuteMenuItemMessage;
class OpenMenuItemMessage : public Message {
public:
OpenMenuItemMessage(bool select_first) :
Message(kOpenMenuItemMessage),
m_select_first(select_first) {
}
// If this value is true, it means that after opening the menu, we
// have to select the first item (i.e. highlighting it).
bool select_first() const { return m_select_first; }
private:
bool m_select_first;
};
class CloseMenuItemMessage : public Message {
public:
CloseMenuItemMessage(bool last_of_close_chain) :
Message(kCloseMenuItemMessage),
m_last_of_close_chain(last_of_close_chain) {
}
// This fields is used to indicate the end of a sequence of
// kOpenMenuItemMessage and kCloseMenuItemMessage messages. If it is true
// the message is the last one of the chain, which means that no
// more kOpenMenuItemMessage or kCloseMenuItemMessage messages are in the queue.
bool last_of_close_chain() const { return m_last_of_close_chain; }
private:
bool m_last_of_close_chain;
};
// Data for the main jmenubar or the first popuped-jmenubox
struct MenuBaseData {
// True when the menu-items must be opened with the cursor movement
bool was_clicked;
// True when there's kOpen/CloseMenuItemMessage messages in queue, to
// avoid start processing another menuitem-request when we're
// already working in one
bool is_processing;
// True when the kMouseDownMessage is being filtered
bool is_filtering;
bool close_all;
MenuBaseData() {
was_clicked = false;
is_filtering = false;
is_processing = false;
close_all = false;
}
};
static MenuBox* get_base_menubox(Widget* widget);
static MenuBaseData* get_base(Widget* widget);
static MenuItem* check_for_letter(Menu* menu, const KeyMessage* keymsg);
static MenuItem* find_nextitem(Menu* menu, MenuItem* menuitem);
static MenuItem* find_previtem(Menu* menu, MenuItem* menuitem);
static void add_scrollbars_if_needed(Window* window)
{
const gfx::Rect rc0 = window->bounds();
gfx::Rect rc = rc0;
if (rc.x < 0) {
rc.w += rc.x;
rc.x = 0;
}
if (rc.x2() > ui::display_w()) {
rc.w = ui::display_w() - rc.x;
}
bool vscrollbarsAdded = false;
if (rc.y < 0) {
rc.h += rc.y;
rc.y = 0;
vscrollbarsAdded = true;
}
if (rc.y2() > ui::display_h()) {
rc.h = ui::display_h() - rc.y;
vscrollbarsAdded = true;
}
if (rc == rc0)
return;
Widget* menubox = window->firstChild();
View* view = new View;
view->InitTheme.connect([view]{ view->noBorderNoChildSpacing(); });
view->initTheme();
if (vscrollbarsAdded) {
rc.w += 2*view->verticalBar()->getBarWidth();
if (rc.x2() > ui::display_w()) {
rc.x = ui::display_w() - rc.w;
if (rc.x < 0) {
rc.x = 0;
rc.w = ui::display_w();
}
}
}
window->setBounds(rc);
window->removeChild(menubox);
view->attachToView(menubox);
window->addChild(view);
}
//////////////////////////////////////////////////////////////////////
// Menu
Menu::Menu()
: Widget(kMenuWidget)
, m_menuitem(nullptr)
{
enableFlags(IGNORE_MOUSE);
initTheme();
}
Menu::~Menu()
{
if (m_menuitem) {
if (m_menuitem->getSubmenu() == this) {
m_menuitem->setSubmenu(nullptr);
}
else {
ASSERT(m_menuitem->getSubmenu() == nullptr);
}
}
}
//////////////////////////////////////////////////////////////////////
// MenuBox
MenuBox::MenuBox(WidgetType type)
: Widget(type)
, m_base(nullptr)
{
this->setFocusStop(true);
initTheme();
}
MenuBox::~MenuBox()
{
stopFilteringMouseDown();
delete m_base;
}
//////////////////////////////////////////////////////////////////////
// MenuBar
bool MenuBar::m_expandOnMouseover = false;
MenuBar::MenuBar()
: MenuBox(kMenuBarWidget)
{
createBase();
}
// static
bool MenuBar::expandOnMouseover()
{
return m_expandOnMouseover;
}
// static
void MenuBar::setExpandOnMouseover(bool state)
{
m_expandOnMouseover = state;
}
//////////////////////////////////////////////////////////////////////
// MenuItem
MenuItem::MenuItem(const std::string& text)
: Widget(kMenuItemWidget)
{
m_highlighted = false;
m_submenu = nullptr;
m_submenu_menubox = nullptr;
setText(text);
initTheme();
}
MenuItem::~MenuItem()
{
delete m_submenu;
}
Menu* MenuBox::getMenu()
{
if (children().empty())
return nullptr;
else
return static_cast<Menu*>(children().front());
}
MenuBaseData* MenuBox::createBase()
{
delete m_base;
m_base = new MenuBaseData;
return m_base;
}
Menu* MenuItem::getSubmenu()
{
return m_submenu;
}
void MenuBox::setMenu(Menu* menu)
{
if (Menu* oldMenu = getMenu())
removeChild(oldMenu);
if (menu) {
ASSERT_VALID_WIDGET(menu);
addChild(menu);
}
}
void MenuItem::setSubmenu(Menu* menu)
{
if (m_submenu)
m_submenu->setOwnerMenuItem(nullptr);
m_submenu = menu;
if (m_submenu) {
ASSERT_VALID_WIDGET(m_submenu);
m_submenu->setOwnerMenuItem(this);
}
}
bool MenuItem::isHighlighted() const
{
return m_highlighted;
}
void MenuItem::setHighlighted(bool state)
{
m_highlighted = state;
}
bool MenuItem::hasSubmenu() const
{
return (m_submenu && !m_submenu->children().empty());
}
void Menu::showPopup(const gfx::Point& pos)
{
// Generally, when we call showPopup() the menu shouldn't contain a
// parent menu-box, because we're filtering kMouseDownMessage to
// close the popup automatically when we click outside the menubox.
// Anyway there is one specific case were a clicked widget might
// call showPopup() when it's clicked the first time, and a second
// click could generate a kDoubleClickMessage which is then
// converted to kMouseDownMessage to finally call showPopup() again.
// In this case, the menu is already in a menubox.
if (parent()) {
static_cast<MenuBox*>(parent())->cancelMenuLoop();
return;
}
// New window and new menu-box
std::unique_ptr<Window> window(new Window(Window::WithoutTitleBar));
MenuBox* menubox = new MenuBox();
MenuBaseData* base = menubox->createBase();
base->was_clicked = true;
window->setMoveable(false); // Can't move the window
// Set children
menubox->setMenu(this);
menubox->startFilteringMouseDown();
window->addChild(menubox);
window->remapWindow();
// Menubox position
window->positionWindow(
base::clamp(pos.x, 0, ui::display_w() - window->bounds().w),
base::clamp(pos.y, 0, ui::display_h() - window->bounds().h));
add_scrollbars_if_needed(window.get());
// Set the focus to the new menubox
Manager* manager = Manager::getDefault();
manager->setFocus(menubox);
menubox->setFocusMagnet(true);
// Open the window
window->openWindowInForeground();
// Free the keyboard focus if it's in the menu popup, in other case
// it means that the user set the focus to other specific widget
// before we closed the popup.
Widget* focus = manager->getFocus();
if (focus && focus->window() == window.get())
focus->releaseFocus();
// Fetch the "menu" so it isn't destroyed
menubox->setMenu(nullptr);
menubox->stopFilteringMouseDown();
}
Widget* Menu::findItemById(const char* id)
{
Widget* result = findChild(id);
if (result)
return result;
for (auto child : children()) {
if (child->type() == kMenuItemWidget) {
if (Menu* submenu = static_cast<MenuItem*>(child)->getSubmenu()) {
result = submenu->findItemById(id);
if (result)
return result;
}
}
}
return nullptr;
}
void Menu::onPaint(PaintEvent& ev)
{
theme()->paintMenu(ev);
}
void Menu::onResize(ResizeEvent& ev)
{
setBoundsQuietly(ev.bounds());
Rect cpos = childrenBounds();
bool isBar = (parent()->type() == kMenuBarWidget);
for (auto child : children()) {
Size reqSize = child->sizeHint();
if (isBar)
cpos.w = reqSize.w;
else
cpos.h = reqSize.h;
child->setBounds(cpos);
if (isBar)
cpos.x += cpos.w;
else
cpos.y += cpos.h;
}
}
void Menu::onSizeHint(SizeHintEvent& ev)
{
Size size(0, 0);
Size reqSize;
for (auto it=children().begin(),
end=children().end();
it!=end; ) {
auto next = it;
++next;
reqSize = (*it)->sizeHint();
if (parent() &&
parent()->type() == kMenuBarWidget) {
size.w += reqSize.w + ((next != end) ? childSpacing(): 0);
size.h = std::max(size.h, reqSize.h);
}
else {
size.w = std::max(size.w, reqSize.w);
size.h += reqSize.h + ((next != end) ? childSpacing(): 0);
}
it = next;
}
size.w += border().width();
size.h += border().height();
ev.setSizeHint(size);
}
bool MenuBox::onProcessMessage(Message* msg)
{
Menu* menu = MenuBox::getMenu();
switch (msg->type()) {
case kMouseMoveMessage:
if (!get_base(this)->was_clicked)
break;
// Fall through
case kMouseDownMessage:
case kDoubleClickMessage:
if (menu) {
ASSERT(menu->parent() == this);
if (get_base(this)->is_processing)
break;
gfx::Point mousePos = static_cast<MouseMessage*>(msg)->position();
// Here we catch the filtered messages (menu-bar or the
// popuped menu-box) to detect if the user press outside of
// the widget
if (msg->type() == kMouseDownMessage && m_base != nullptr) {
Widget* picked = manager()->pick(mousePos);
// If one of these conditions are accomplished we have to
// close all menus (back to menu-bar or close the popuped
// menubox), this is the place where we control if...
if (picked == nullptr || // If the button was clicked nowhere
picked == this || // If the button was clicked in this menubox
// The picked widget isn't from the same tree of menus
(get_base_menubox(picked) != this ||
(this->type() == kMenuBarWidget &&
picked->type() == kMenuWidget))) {
// The user click outside all the menu-box/menu-items, close all
menu->closeAll();
return true;
}
}
// Get the widget below the mouse cursor
Widget* picked = menu->pick(mousePos);
if (picked) {
if ((picked->type() == kMenuItemWidget) &&
!(picked->hasFlags(DISABLED))) {
MenuItem* pickedItem = static_cast<MenuItem*>(picked);
// If the picked menu-item is not highlighted...
if (!pickedItem->isHighlighted()) {
// In menu-bar always open the submenu, in other popup-menus
// open the submenu only if the user does click
bool open_submenu =
(this->type() == kMenuBarWidget) ||
(msg->type() == kMouseDownMessage);
menu->highlightItem(pickedItem, false, open_submenu, false);
}
// If the user pressed in a highlighted menu-item (maybe
// the user was waiting for the timer to open the
// submenu...)
else if (msg->type() == kMouseDownMessage &&
pickedItem->hasSubmenu()) {
pickedItem->stopTimer();
// If the submenu is closed, open it
if (!pickedItem->hasSubmenuOpened())
pickedItem->openSubmenu(false);
else if (pickedItem->inBar()) {
pickedItem->getSubmenu()->closeAll();
// Set this flag to false so the submenu is not open
// again on kMouseMoveMessage.
get_base(this)->was_clicked = false;
}
}
}
else if (!get_base(this)->was_clicked) {
menu->unhighlightItem();
}
}
}
break;
case kMouseLeaveMessage:
if (menu) {
if (get_base(this)->is_processing)
break;
MenuItem* highlight = menu->getHighlightedItem();
if (highlight && !highlight->hasSubmenuOpened())
menu->unhighlightItem();
}
break;
case kMouseUpMessage:
if (menu) {
if (get_base(this)->is_processing)
break;
// The item is highlighted and not opened (and the timer to open the submenu is stopped)
MenuItem* highlight = menu->getHighlightedItem();
if (highlight &&
!highlight->hasSubmenuOpened() &&
highlight->m_submenu_timer == nullptr) {
menu->closeAll();
highlight->executeClick();
}
}
break;
case kKeyDownMessage:
if (menu) {
MenuItem* selected;
if (get_base(this)->is_processing)
break;
get_base(this)->was_clicked = false;
// Check for ALT+some underlined letter
if (((this->type() == kMenuBoxWidget) && (msg->modifiers() == kKeyNoneModifier || // <-- Inside menu-boxes we can use letters without Alt modifier pressed
msg->modifiers() == kKeyAltModifier)) ||
((this->type() == kMenuBarWidget) && (msg->modifiers() == kKeyAltModifier))) {
auto keymsg = static_cast<KeyMessage*>(msg);
selected = check_for_letter(menu, keymsg);
if (selected) {
menu->highlightItem(selected, true, true, true);
return true;
}
}
// Highlight movement with keyboard
if (this->hasFocus()) {
MenuItem* highlight = menu->getHighlightedItem();
MenuItem* child_with_submenu_opened = nullptr;
bool used = false;
// Search a child with highlight or the submenu opened
for (auto child : menu->children()) {
if (child->type() != kMenuItemWidget)
continue;
if (static_cast<MenuItem*>(child)->hasSubmenuOpened())
child_with_submenu_opened = static_cast<MenuItem*>(child);
}
if (!highlight && child_with_submenu_opened)
highlight = child_with_submenu_opened;
switch (static_cast<KeyMessage*>(msg)->scancode()) {
case kKeyEsc:
// In menu-bar
if (this->type() == kMenuBarWidget) {
if (highlight) {
cancelMenuLoop();
used = true;
}
}
// In menu-boxes
else {
if (child_with_submenu_opened) {
child_with_submenu_opened->closeSubmenu(true);
used = true;
}
// Go to parent
else if (menu->m_menuitem) {
// Just retrogress one parent-level
menu->m_menuitem->closeSubmenu(true);
used = true;
}
}
break;
case kKeyUp:
// In menu-bar
if (this->type() == kMenuBarWidget) {
if (child_with_submenu_opened)
child_with_submenu_opened->closeSubmenu(true);
}
// In menu-boxes
else {
// Go to previous
highlight = find_previtem(menu, highlight);
menu->highlightItem(highlight, false, false, false);
}
used = true;
break;
case kKeyDown:
// In menu-bar
if (this->type() == kMenuBarWidget) {
// Select the active menu
menu->highlightItem(highlight, true, true, true);
}
// In menu-boxes
else {
// Go to next
highlight = find_nextitem(menu, highlight);
menu->highlightItem(highlight, false, false, false);
}
used = true;
break;
case kKeyLeft:
// In menu-bar
if (this->type() == kMenuBarWidget) {
// Go to previous
highlight = find_previtem(menu, highlight);
menu->highlightItem(highlight, false, false, false);
}
// In menu-boxes
else {
// Go to parent
if (menu->m_menuitem) {
Widget* parent = menu->m_menuitem->parent()->parent();
// Go to the previous item in the parent
// If the parent is the menu-bar
if (parent->type() == kMenuBarWidget) {
menu = static_cast<MenuBar*>(parent)->getMenu();
MenuItem* menuitem = find_previtem(menu, menu->getHighlightedItem());
// Go to previous item in the parent
menu->highlightItem(menuitem, false, true, true);
}
// If the parent isn't the menu-bar
else {
// Just retrogress one parent-level
menu->m_menuitem->closeSubmenu(true);
}
}
}
used = true;
break;
case kKeyRight:
// In menu-bar
if (this->type() == kMenuBarWidget) {
// Go to next
highlight = find_nextitem(menu, highlight);
menu->highlightItem(highlight, false, false, false);
}
// In menu-boxes
else {
// Enter in sub-menu
if (highlight && highlight->hasSubmenu()) {
menu->highlightItem(highlight, true, true, true);
}
// Go to parent
else if (menu->m_menuitem) {
// Get the root menu
MenuBox* root = get_base_menubox(this);
menu = root->getMenu();
// Go to the next item in the root
MenuItem* menuitem = find_nextitem(menu, menu->getHighlightedItem());
// Open the sub-menu
menu->highlightItem(menuitem, false, true, true);
}
}
used = true;
break;
case kKeyEnter:
case kKeyEnterPad:
if (highlight)
menu->highlightItem(highlight, true, true, true);
used = true;
break;
}
// Return true if we've already consumed the key.
if (used) {
return true;
}
// If the user presses the ALT key we close everything.
else if (static_cast<KeyMessage*>(msg)->scancode() == kKeyAlt) {
cancelMenuLoop();
}
}
}
break;
case kMouseWheelMessage: {
View* view = View::getView(this);
if (view) {
auto mouseMsg = static_cast<MouseMessage*>(msg);
gfx::Point scroll = view->viewScroll();
if (mouseMsg->preciseWheel())
scroll += mouseMsg->wheelDelta();
else
scroll += mouseMsg->wheelDelta() * textHeight()*3;
view->setViewScroll(scroll);
}
break;
}
default:
if (msg->type() == kClosePopupMessage) {
window()->closeWindow(nullptr);
}
break;
}
return Widget::onProcessMessage(msg);
}
void MenuBox::onResize(ResizeEvent& ev)
{
setBoundsQuietly(ev.bounds());
if (Menu* menu = getMenu())
menu->setBounds(childrenBounds());
}
void MenuBox::onSizeHint(SizeHintEvent& ev)
{
Size size(0, 0);
if (Menu* menu = getMenu())
size = menu->sizeHint();
size.w += border().width();
size.h += border().height();
ev.setSizeHint(size);
}
bool MenuItem::onProcessMessage(Message* msg)
{
switch (msg->type()) {
case kMouseEnterMessage:
// TODO theme specific!!
invalidate();
// When a menu item receives the mouse, start a timer to open the submenu...
if (isEnabled() && hasSubmenu()) {
// Start the timer to open the submenu...
if (!inBar() || MenuBar::expandOnMouseover())
startTimer();
}
break;
case kMouseLeaveMessage:
// Unhighlight this item if its submenu isn't opened
if (isHighlighted() &&
!m_submenu_menubox &&
parent() &&
parent()->type() == kMenuWidget) {
static_cast<Menu*>(parent())->unhighlightItem();
}
// TODO theme specific!!
invalidate();
// Stop timer to open the popup
if (m_submenu_timer)
m_submenu_timer.reset();
break;
default:
if (msg->type() == kOpenMessage) {
validateItem();
}
else if (msg->type() == kOpenMenuItemMessage) {
validateItem();
MenuBaseData* base = get_base(this);
bool select_first = static_cast<OpenMenuItemMessage*>(msg)->select_first();
ASSERT(base != nullptr);
ASSERT(base->is_processing);
ASSERT(hasSubmenu());
Rect old_pos = window()->bounds();
old_pos.w -= 1*guiscale();
MenuBox* menubox = new MenuBox();
m_submenu_menubox = menubox;
menubox->setMenu(m_submenu);
// New window and new menu-box
auto window = new MenuBoxWindow(menubox);
// Menubox position
Rect pos = window->bounds();
if (inBar()) {
pos.x = base::clamp(bounds().x, 0, ui::display_w()-pos.w);
pos.y = std::max(0, bounds().y2());
}
else {
int x_left = old_pos.x - pos.w;
int x_right = old_pos.x2();
int x, y = bounds().y-3*guiscale();
Rect r1(0, 0, pos.w, pos.h), r2(0, 0, pos.w, pos.h);
r1.x = x_left = base::clamp(x_left, 0, ui::display_w()-pos.w);
r2.x = x_right = base::clamp(x_right, 0, ui::display_w()-pos.w);
r1.y = r2.y = y = base::clamp(y, 0, ui::display_h()-pos.h);
// Calculate both intersections
gfx::Rect s1 = r1.createIntersection(old_pos);
gfx::Rect s2 = r2.createIntersection(old_pos);
if (s2.isEmpty())
x = x_right; // Use the right because there aren't intersection with it
else if (s1.isEmpty())
x = x_left; // Use the left because there are not intersection
else if (r2.w*r2.h <= r1.w*r1.h)
x = x_right; // Use the right because there are less intersection area
else
x = x_left; // Use the left because there are less intersection area
pos.x = x;
pos.y = y;
}
window->positionWindow(pos.x, pos.y);
add_scrollbars_if_needed(window);
// Set the focus to the new menubox
menubox->setFocusMagnet(true);
// Setup the highlight of the new menubox
if (select_first) {
// Select the first child
MenuItem* first_child = nullptr;
for (auto child : m_submenu->children()) {
if (child->type() != kMenuItemWidget)
continue;
if (child->isEnabled()) {
first_child = static_cast<MenuItem*>(child);
break;
}
}
if (first_child)
m_submenu->highlightItem(first_child, false, false, false);
else
m_submenu->unhighlightItem();
}
else
m_submenu->unhighlightItem();
// Run in background
window->openWindow();
base->is_processing = false;
return true;
}
else if (msg->type() == kCloseMenuItemMessage) {
bool last_of_close_chain = static_cast<CloseMenuItemMessage*>(msg)->last_of_close_chain();
MenuBaseData* base = get_base(this);
ASSERT(base != nullptr);
ASSERT(base->is_processing);
MenuBox* menubox = m_submenu_menubox;
m_submenu_menubox = nullptr;
ASSERT(menubox != nullptr);
Window* window = menubox->window();
ASSERT(window && window->type() == kWindowWidget);
// Fetch the "menu" to avoid destroy it with 'delete'.
menubox->setMenu(nullptr);
// Destroy the window
window->closeWindow(nullptr);
// Set the focus to this menu-box of this menu-item
if (base->close_all)
manager()->freeFocus();
else
manager()->setFocus(this->parent()->parent());
// Do not call "delete window" here, because it
// (MenuBoxWindow) will be deferDelete() on
// kCloseMessage.
if (last_of_close_chain) {
base->close_all = false;
base->is_processing = false;
}
// Stop timer to open the popup
stopTimer();
return true;
}
else if (msg->type() == kExecuteMenuItemMessage) {
onClick();
return true;
}
break;
case kTimerMessage:
if (static_cast<TimerMessage*>(msg)->timer() == m_submenu_timer.get()) {
MenuBaseData* base = get_base(this);
ASSERT(hasSubmenu());
// Stop timer to open the popup
stopTimer();
// If the submenu is closed, and we are not processing messages, open it
if (m_submenu_menubox == nullptr && !base->is_processing)
openSubmenu(false);
}
break;
}
return Widget::onProcessMessage(msg);
}
void MenuItem::onInitTheme(InitThemeEvent& ev)
{
if (m_submenu)
m_submenu->initTheme();
if (m_submenu_menubox)
m_submenu_menubox->initTheme();
Widget::onInitTheme(ev);
}
void MenuItem::onPaint(PaintEvent& ev)
{
theme()->paintMenuItem(ev);
}
void MenuItem::onClick()
{
// Fire new Click() signal.
Click();
}
void MenuItem::onValidate()
{
// Here the user can customize the automatic validation of the menu
// item before it's shown.
}
void MenuItem::onSizeHint(SizeHintEvent& ev)
{
Size size(0, 0);
if (hasText()) {
size.w =
+ textWidth()
+ (inBar() ? childSpacing()/4: childSpacing())
+ border().width();
size.h =
+ textHeight()
+ border().height();
}
ev.setSizeHint(size);
}