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menu.cpp
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menu.cpp
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// Aseprite UI Library
// Copyright (C) 2018-2022 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 "gfx/size.h"
#include "os/font.h"
#include "ui/display.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 choose_side(gfx::Rect& bounds,
const gfx::Rect& workarea,
const gfx::Rect& parentBounds)
{
int scale = guiscale();
if (get_multiple_displays())
scale = Manager::getDefault()->display()->scale();
int x_left = parentBounds.x - bounds.w + 1*scale;
int x_right = parentBounds.x2() - 1*scale;
int x, y = bounds.y;
Rect r1(0, 0, bounds.w, bounds.h);
Rect r2(0, 0, bounds.w, bounds.h);
r1.x = x_left = std::clamp(x_left, workarea.x, std::max(workarea.x, workarea.x2()-bounds.w));
r2.x = x_right = std::clamp(x_right, workarea.x, std::max(workarea.x, workarea.x2()-bounds.w));
r1.y = r2.y = y = std::clamp(y, workarea.y, std::max(workarea.y, workarea.y2()-bounds.h));
// Calculate both intersections
const gfx::Rect s1 = r1.createIntersection(parentBounds);
const gfx::Rect s2 = r2.createIntersection(parentBounds);
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 (s2.w*s2.h <= s1.w*s1.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
bounds.x = x;
bounds.y = y;
}
static void add_scrollbars_if_needed(MenuBoxWindow* window,
const gfx::Rect& workarea,
gfx::Rect& bounds)
{
gfx::Rect rc = bounds;
if (rc.x < workarea.x) {
rc.w -= (workarea.x - rc.x);
rc.x = workarea.x;
}
if (rc.x2() > workarea.x2()) {
rc.w = workarea.x2() - rc.x;
}
bool vscrollbarsAdded = false;
if (rc.y < workarea.y) {
rc.h -= (workarea.y - rc.y);
rc.y = workarea.y;
vscrollbarsAdded = true;
}
if (rc.y2() > workarea.y2()) {
rc.h = workarea.y2() - rc.y;
vscrollbarsAdded = true;
}
if (rc == bounds)
return;
MenuBox* menubox = window->menubox();
View* view = new View;
view->InitTheme.connect([view]{ view->noBorderNoChildSpacing(); });
view->initTheme();
if (vscrollbarsAdded) {
int barWidth = view->verticalBar()->getBarWidth();;
if (get_multiple_displays())
barWidth *= window->display()->scale();
rc.w += 2*barWidth;
if (rc.x2() > workarea.x2()) {
rc.x = workarea.x2() - rc.w;
if (rc.x < workarea.x) {
rc.x = workarea.x;
rc.w = workarea.w;
}
}
}
// New bounds
bounds = 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);
}
}
}
void Menu::onOpenPopup()
{
OpenPopup();
}
//////////////////////////////////////////////////////////////////////
// MenuBox
MenuBox::MenuBox(WidgetType type)
: Widget(type)
, m_base(nullptr)
{
this->setFocusStop(true);
initTheme();
}
MenuBox::~MenuBox()
{
stopFilteringMouseDown();
}
//////////////////////////////////////////////////////////////////////
// MenuBar
bool MenuBar::m_expandOnMouseover = false;
MenuBar::MenuBar(ProcessTopLevelShortcuts processShortcuts)
: MenuBox(kMenuBarWidget)
, m_processTopLevelShortcuts(processShortcuts == ProcessTopLevelShortcuts::kYes)
{
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()
{
m_base.reset(new MenuBaseData);
return m_base.get();
}
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);
}
}
void MenuItem::openSubmenu()
{
if (auto menu = static_cast<Menu*>(parent()))
menu->highlightItem(this, true, true, true);
}
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,
Display* parentDisplay)
{
// 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
MenuBoxWindow window;
window.Open.connect([this]{ this->onOpenPopup(); });
MenuBox* menubox = window.menubox();
MenuBaseData* base = menubox->createBase();
base->was_clicked = true;
// Set children
menubox->setMenu(this);
menubox->startFilteringMouseDown();
window.remapWindow();
fit_bounds(parentDisplay,
&window,
gfx::Rect(pos, window.size()),
[&window, pos](const gfx::Rect& workarea,
gfx::Rect& bounds,
std::function<gfx::Rect(Widget*)> getWidgetBounds) {
choose_side(bounds, workarea, gfx::Rect(bounds.x-1, bounds.y, 1, 1));
add_scrollbars_if_needed(&window, workarea, bounds);
});
// Set the focus to the new menubox
Manager* manager = Manager::getDefault();
manager->setFocus(menubox);
// 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)
focus->releaseFocus();
menubox->stopFilteringMouseDown();
}
Widget* Menu::findItemById(const char* id) const
{
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: {
MenuBaseData* base = get_base(this);
ASSERT(base);
if (!base)
break;
if (!base->was_clicked)
break;
[[fallthrough]];
}
case kMouseDownMessage:
case kDoubleClickMessage:
if (menu && msg->display()) {
ASSERT(menu->parent() == this);
MenuBaseData* base = get_base(this);
ASSERT(base);
if (!base)
break;
if (base->is_processing)
break;
const gfx::Point mousePos = static_cast<MouseMessage*>(msg)->position();
const gfx::Point screenPos = msg->display()->nativeWindow()->pointToScreen(mousePos);
// Get the widget below the mouse cursor
auto mgr = manager();
if (!mgr)
break;
Widget* picked = mgr->pickFromScreenPos(screenPos);
// 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) {
// 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();
// Change to "return false" if you want to send the click
// to the window after closing all menus.
return true;
}
}
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.
base->was_clicked = false;
}
}
}
else if (!base->was_clicked) {
menu->unhighlightItem();
}
}
}
break;
case kMouseLeaveMessage:
if (menu) {
MenuBaseData* base = get_base(this);
ASSERT(base);
if (!base)
break;
if (base->is_processing)
break;
MenuItem* highlight = menu->getHighlightedItem();
if (highlight && !highlight->hasSubmenuOpened())
menu->unhighlightItem();
}
break;
case kMouseUpMessage:
if (menu) {
MenuBaseData* base = get_base(this);
ASSERT(base);
if (!base)
break;
if (base->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;
MenuBaseData* base = get_base(this);
ASSERT(base);
if (!base)
break;
if (base->is_processing)
break;
base->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) &&
static_cast<MenuBar*>(this)->processTopLevelShortcuts())) {
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);
ASSERT(root);
if (!root)
break;
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);
ASSERT(base);
if (!base)
break;
bool select_first = static_cast<OpenMenuItemMessage*>(msg)->select_first();
ASSERT(base->is_processing);
ASSERT(hasSubmenu());
// New window that will be automatically deleted
auto window = new MenuBoxWindow(this);
window->Close.connect([window]{
window->deferDelete();
});
MenuBox* menubox = window->menubox();
m_submenu_menubox = menubox;
menubox->setMenu(m_submenu);
window->remapWindow();
fit_bounds(
display(), window, window->bounds(),
[this, window](const gfx::Rect& workarea,
gfx::Rect& bounds,
std::function<gfx::Rect(Widget*)> getWidgetBounds){
const gfx::Rect itemBounds = getWidgetBounds(this);
if (inBar()) {
bounds.x = std::clamp(itemBounds.x, workarea.x, std::max(workarea.x, workarea.x2()-bounds.w));
bounds.y = std::max(workarea.y, itemBounds.y2());
}
else {
int scale = guiscale();
if (get_multiple_displays())
scale = display()->scale();
const gfx::Rect parentBounds = getWidgetBounds(this->window());
bounds.y = itemBounds.y-3*scale;
choose_side(bounds, workarea, parentBounds);
}
add_scrollbars_if_needed(window, workarea, bounds);
});
// 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);
if (!base)
break;
ASSERT(base->is_processing);
ASSERT(m_submenu_menubox);
Window* window = m_submenu_menubox->window();
ASSERT(window && window->type() == kWindowWidget);
m_submenu_menubox = 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;