// // "$Id: Fl_Menu.cxx,v 1.18.2.2 1999/08/09 06:19:33 bill Exp $" // // Menu code for the Fast Light Tool Kit (FLTK). // // Copyright 1998-1999 by Bill Spitzak and others. // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Library General Public License for more details. // // You should have received a copy of the GNU Library General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA. // // Please report all bugs and problems to "fltk-bugs@easysw.com". // // Warning: this menu code is quite a mess! // This file contains code for implementing Fl_Menu_Item, and for // methods for bringing up popup menu hierarchies without using the // Fl_Menu_ widget. #include #include #include #include int Fl_Menu_Item::size() const { const Fl_Menu_Item* m = this; int nest = 0; for (;;) { if (!m->text) { if (!nest) return (m-this+1); nest--; } else if (m->flags & FL_SUBMENU) { nest++; } m++; } } const Fl_Menu_Item* Fl_Menu_Item::next(int n) const { if (n < 0) return 0; // this is so selected==-1 returns NULL const Fl_Menu_Item* m = this; int nest = 0; while (n>0) { if (!m->text) { if (!nest) return m; nest--; } else if (m->flags&FL_SUBMENU) { nest++; } m++; if (!nest && m->visible()) n--; } return m; } // appearance of current menus are pulled from this parent widget: static const Fl_Menu_* button; //////////////////////////////////////////////////////////////// // tiny window for title of menu: class menutitle : public Fl_Menu_Window { void draw(); public: const Fl_Menu_Item* menu; menutitle(int X, int Y, int W, int H, const Fl_Menu_Item*); }; // each vertical menu has one of these: class menuwindow : public Fl_Menu_Window { void draw(); void drawentry(const Fl_Menu_Item*, int i, int erase); public: menutitle* title; int handle(int); int itemheight; // zero == menubar int numitems; int selected; int drawn_selected; // last redraw has this selected const Fl_Menu_Item* menu; menuwindow(const Fl_Menu_Item* m, int X, int Y, int W, int H, const Fl_Menu_Item* picked, const Fl_Menu_Item* title, int menubar = 0, int menubar_title = 0); ~menuwindow(); void set_selected(int); int find_selected(int mx, int my); int titlex(int); void autoscroll(int); void position(int x, int y); }; #define LEADING 4 // extra vertical leading extern char fl_draw_shortcut; // width of label, including effect of & characters: int Fl_Menu_Item::measure(int* hp, const Fl_Menu_* m) const { Fl_Label l; l.value = text; l.type = labeltype_; l.font = labelsize_ ? labelfont_ : uchar(m ? m->textfont() : FL_HELVETICA); l.size = labelsize_ ? labelsize_ : m ? m->textsize() : FL_NORMAL_SIZE; l.color = labelcolor_; fl_draw_shortcut = 1; int w = 0; int h = 0; l.measure(w, hp ? *hp : h); fl_draw_shortcut = 0; if (flags & (FL_MENU_TOGGLE|FL_MENU_RADIO)) w += 14; return w; } void Fl_Menu_Item::draw(int x, int y, int w, int h, const Fl_Menu_* m, int selected) const { Fl_Label l; l.value = text; l.type = labeltype_; l.font = labelsize_ ? labelfont_ : uchar(m ? m->textfont() : FL_HELVETICA); l.size = labelsize_ ? labelsize_ : m ? m->textsize() : FL_NORMAL_SIZE; l.color = !active() ? inactive((Fl_Color)labelcolor_) : (Fl_Color)labelcolor_; Fl_Color color = m ? m->color() : FL_GRAY; if (selected) { Fl_Color r = m ? m->selection_color() : FL_SELECTION_COLOR; Fl_Boxtype b = m && m->down_box() ? m->down_box() : FL_FLAT_BOX; if (contrast(r,color)!=r) { // back compatability boxtypes if (selected == 2) { // menu title r = color; b = m ? m->box() : FL_UP_BOX; } else { r = (Fl_Color)(FL_COLOR_CUBE-1); // white l.color = contrast((Fl_Color)labelcolor_, r); } } else { l.color = contrast((Fl_Color)labelcolor_, r); } if (selected == 2) { // menu title fl_draw_box(b, x, y, w, h, r); x += 3; w -= 8; } else { fl_draw_box(b, x+1, y-1, w-2, h+2, r); } } if (flags & (FL_MENU_TOGGLE|FL_MENU_RADIO)) { int y1 = y+(h-14)/2; fl_color(FL_DARK3); if (flags & FL_MENU_RADIO) { fl_line(x+2, y1+7, x+8, y1+1, x+14, y1+7); if (selected) { fl_color(color); fl_polygon(x+3, y1+7, x+8, y1+2, x+13, y1+7, x+8, y1+12); } fl_color(FL_LIGHT3); fl_line(x+14, y1+7, x+8, y1+13, x+2, y1+7); if (value()) { fl_color(FL_BLACK); fl_polygon(x+4, y1+7, x+8, y1+3, x+12, y1+7, x+8, y1+11); } } else { fl_yxline(x+3, y1+11, y1+2, x+12); if (selected) {fl_color(color); fl_rectf(x+4, y1+3, 9, 9);} fl_color(FL_LIGHT3); fl_xyline(x+4, y1+12, x+13, y1+3); if (value()) {fl_color(FL_BLACK); fl_rectf(x+5, y1+4, 7, 7);} } x += 14; w -= 14; } if (!fl_draw_shortcut) fl_draw_shortcut = 1; l.draw(x+3, y, w>6 ? w-6 : 0, h, FL_ALIGN_LEFT); fl_draw_shortcut = 0; } menutitle::menutitle(int X, int Y, int W, int H, const Fl_Menu_Item* L) : Fl_Menu_Window(X, Y, W, H, 0) { end(); set_modal(); clear_border(); menu = L; if (L->labelcolor_) clear_overlay(); } menuwindow::menuwindow(const Fl_Menu_Item* m, int X, int Y, int Wp, int Hp, const Fl_Menu_Item* picked, const Fl_Menu_Item* t, int menubar, int menubar_title) : Fl_Menu_Window(X, Y, Wp, Hp, 0) { end(); set_modal(); clear_border(); menu = m; drawn_selected = -1; box(button && button->box() ? button->box() : FL_UP_BOX); color(button ? button->color() : FL_GRAY); selected = -1; {int i = 0; if (m) for (const Fl_Menu_Item* m1=m; ; m1 = m1->next(), i++) { if (picked) { if (m1 == picked) {selected = i; picked = 0;} else if (m1 > picked) {selected = i-1; picked = 0; Wp = Hp = 0;} } if (!m1->text) break; } numitems = i;} if (menubar) { itemheight = 0; title = 0; return; } itemheight = 1; int hotKeysw = 0; int Wtitle = 0; int Htitle = 0; if (t) Wtitle = t->measure(&Htitle, button) + 12; int W = 0; if (m) for (; m->text; m = m->next()) { int h; int w1 = m->measure(&h, button); if (h+LEADING>itemheight) itemheight = h+LEADING; if (m->flags&(FL_SUBMENU|FL_SUBMENU_POINTER)) w1 += 14; if (w1 > W) W = w1; if (m->shortcut_) { w1 = int(fl_width(fl_shortcut_label(m->shortcut_))) + 8; if (w1 > hotKeysw) hotKeysw = w1; } if (m->labelcolor_) clear_overlay(); } if (selected >= 0 && !Wp) X -= W/2; int BW = Fl::box_dx(box()); W += hotKeysw+2*BW+7; if (Wp > W) W = Wp; if (Wtitle > W) W = Wtitle; if (!Wp) {if (X < 0) X = 0; if (X > Fl::w()-W) X= Fl::w()-W;} x(X); w(W); h((numitems ? itemheight*numitems-LEADING : 0)+2*BW+5); if (selected >= 0) Y = Y+(Hp-itemheight)/2-selected*itemheight-BW+1; else Y = Y+Hp; if (m) y(Y-1); else {y(Y-3); w(1); h(1);} if (t) { int ht = menubar_title ? button->h()-6 : Htitle+2*BW+3; title = new menutitle(X, Y-ht-3, Wtitle, ht, t); } else title = 0; } menuwindow::~menuwindow() { delete title; } void menuwindow::position(int X, int Y) { if (title) {title->position(X, title->y()+Y-y());} Fl_Menu_Window::position(X, Y); // x(X); y(Y); // don't wait for response from X } // scroll so item i is visible on screen void menuwindow::autoscroll(int i) { int Y = y()+Fl::box_dx(box())+2+i*itemheight; if (Y <= Fl::y()) Y = Fl::y()-Y+10; else { Y = Y+itemheight-Fl::h()-Fl::y(); if (Y < 0) return; Y = -Y-10; } Fl_Menu_Window::position(x(), y()+Y); // y(y()+Y); // don't wait for response from X } //////////////////////////////////////////////////////////////// void menuwindow::drawentry(const Fl_Menu_Item* m, int i, int erase) { if (!m) return; // this happens if -1 is selected item and redrawn int BW = Fl::box_dx(box()); int x = BW; int W = this->w(); int w = W-2*BW-1; int y = BW+2+i*itemheight; int h = itemheight - LEADING; if (erase && i != selected) { fl_color(button ? button->color() : FL_GRAY); fl_rectf(x+1, y-1, w-2, h+2); } m->draw(x, y, w, h, button, i==selected); // the shortcuts and arrows assumme fl_color() was left set by draw(): if (m->submenu()) { int y1 = y+(h-14)/2; fl_polygon(x+w-13, y1+2, x+w-13, y1+2+10, x+w-3, y1+2+5); } else if (m->shortcut_) { Fl_Font f = button ? button->textfont() : FL_HELVETICA; fl_font(f, button ? button->textsize() : FL_NORMAL_SIZE); fl_draw(fl_shortcut_label(m->shortcut_), x, y, w-3, h, FL_ALIGN_RIGHT); } if (m->flags & FL_MENU_DIVIDER) { fl_color(FL_DARK3); fl_xyline(BW-1, y+h+1, W-2*BW+2); fl_color(FL_LIGHT3); fl_xyline(BW-1, y+h+2, W-2*BW+2); } } void menutitle::draw() { menu->draw(0, 0, w(), h(), button, 2); } void menuwindow::draw() { if (damage() != FL_DAMAGE_CHILD) { // complete redraw fl_draw_box(box(), 0, 0, w(), h(), color()); if (menu) { const Fl_Menu_Item* m; int i; for (m=menu, i=0; m->text; i++, m = m->next()) drawentry(m, i, 0); } } else { if (damage() & FL_DAMAGE_CHILD && selected!=drawn_selected) { // change selection drawentry(menu->next(drawn_selected), drawn_selected, 1); drawentry(menu->next(selected), selected, 1); } } drawn_selected = selected; } void menuwindow::set_selected(int i) { if (i != selected) {selected = i; damage(FL_DAMAGE_CHILD);} } //////////////////////////////////////////////////////////////// int menuwindow::find_selected(int mx, int my) { if (!menu || !menu->text) return -1; mx -= x(); my -= y(); if (my < 0 || my >= h()) return -1; if (!itemheight) { // menubar int x = 3; int i = 0; const Fl_Menu_Item* m = menu; for (; ; m = m->next(), i++) { if (!m->text) return -1; x += m->measure(0, button) + 16; if (x > mx) break; } return i; } if (mx < Fl::box_dx(box()) || mx >= w()) return -1; int i = (my-Fl::box_dx(box())-1)/itemheight; if (i < 0 || i>=numitems) return -1; return i; } // return horizontal position for item i in a menubar: int menuwindow::titlex(int i) { const Fl_Menu_Item* m; int x = 3; for (m=menu; i--; m = m->next()) x += m->measure(0, button) + 16; return x; } // match shortcuts & label shortcuts, don't search submenus: // returns menu item and index const Fl_Menu_Item* Fl_Menu_Item::find_shortcut(int* ip) const { const Fl_Menu_Item* m1 = this; for (int ii = 0; m1 && m1->text; m1 = m1->next(1), ii++) { if (m1->activevisible() && (Fl::test_shortcut(m1->shortcut_) || Fl_Widget::test_shortcut(m1->text))) {if (ip) *ip=ii; return m1;} } return 0; } //////////////////////////////////////////////////////////////// // Fl_Menu_Item::popup(...) // Because Fl::grab() is done, all events go to one of the menu windows. // But the handle method needs to look at all of them to find out // what item the user is pointing at. And it needs a whole lot // of other state variables to determine what is going on with // the currently displayed menus. // So the main loop (handlemenu()) puts all the state in a structure // and puts a pointer to it in a static location, so the handle() // on menus can refer to it and alter it. The handle() method // changes variables in this state to indicate what item is // picked, but does not actually alter the display, instead the // main loop does that. This is because the X mapping and unmapping // of windows is slow, and we don't want to fall behind the events. // values for menustate.state: #define INITIAL_STATE 0 // no mouse up or down since popup() called #define PUSH_STATE 1 // mouse has been pushed on a normal item #define DONE_STATE 2 // exit the popup, the current item was picked #define MENU_PUSH_STATE 3 // mouse has been pushed on a menu title struct menustate { const Fl_Menu_Item* current_item; // what mouse is pointing at int menu_number; // which menu it is in int item_number; // which item in that menu, -1 if none menuwindow* p[20]; // pointers to menus int nummenus; int menubar; // if true p[0] is a menubar int state; }; static menustate* p; static inline void setitem(const Fl_Menu_Item* i, int m, int n) { p->current_item = i; p->menu_number = m; p->item_number = n; } static void setitem(int m, int n) { menustate &p = *(::p); p.current_item = (n >= 0) ? p.p[m]->menu->next(n) : 0; p.menu_number = m; p.item_number = n; } static int forward(int menu) { // go to next item in menu menu if possible menustate &p = *(::p); menuwindow &m = *(p.p[menu]); int item = (menu == p.menu_number) ? p.item_number : m.selected; while (++item < m.numitems) { const Fl_Menu_Item* m1 = m.menu->next(item); if (m1->activevisible()) {setitem(m1, menu, item); return 1;} } return 0; } static int backward(int menu) { // previous item in menu menu if possible menustate &p = *(::p); menuwindow &m = *(p.p[menu]); int item = (menu == p.menu_number) ? p.item_number : m.selected; if (item < 0) item = m.numitems; while (--item >= 0) { const Fl_Menu_Item* m1 = m.menu->next(item); if (m1->activevisible()) {setitem(m1, menu, item); return 1;} } return 0; } int menuwindow::handle(int e) { menustate &p = *(::p); switch (e) { case FL_KEYBOARD: switch (Fl::event_key()) { case FL_Tab: if (Fl::event_shift()&FL_SHIFT) goto BACKTAB; case ' ': if (!forward(p.menu_number)) {p.item_number = -1; forward(p.menu_number);} return 1; case FL_BackSpace: case 0xFE20: // backtab BACKTAB: if (!backward(p.menu_number)) {p.item_number = -1;backward(p.menu_number);} return 1; case FL_Up: if (p.menubar && p.menu_number == 0) ; else if (backward(p.menu_number)); else if (p.menubar && p.menu_number==1) setitem(0, p.p[0]->selected); return 1; case FL_Down: if (p.menu_number || !p.menubar) forward(p.menu_number); else if (p.menu_number < p.nummenus-1) forward(p.menu_number+1); return 1; case FL_Right: if (p.menubar && (p.menu_number<=0 || p.menu_number==1 && p.nummenus==2)) forward(0); else if (p.menu_number < p.nummenus-1) forward(p.menu_number+1); return 1; case FL_Left: if (p.menubar && p.menu_number<=1) backward(0); else if (p.menu_number>0) setitem(p.menu_number-1, p.p[p.menu_number-1]->selected); return 1; case FL_Enter: p.state = DONE_STATE; return 1; case FL_Escape: setitem(0, -1, 0); p.state = DONE_STATE; return 1; } break; case FL_SHORTCUT: { for (int menu = p.nummenus; menu--;) { menuwindow &mw = *(p.p[menu]); int item; const Fl_Menu_Item* m = mw.menu->find_shortcut(&item); if (m) { setitem(m, menu, item); if (!m->submenu()) p.state = DONE_STATE; return 1; } }} break; case FL_PUSH: //case FL_MOVE: case FL_DRAG: { int mx = Fl::event_x_root(); int my = Fl::event_y_root(); int item=0; int menu; for (menu = p.nummenus-1; ; menu--) { item = p.p[menu]->find_selected(mx, my); if (item >= 0) break; if (menu <= 0) break; } setitem(menu, item); if (e == FL_PUSH) { if (p.current_item && p.current_item->submenu() // this is a menu title && item != p.p[menu]->selected // and it is not already on && !p.current_item->callback_) // and it does not have a callback p.state = MENU_PUSH_STATE; else p.state = PUSH_STATE; }} return 1; case FL_RELEASE: // do nothing if they try to pick inactive items if (p.current_item && !p.current_item->activevisible()) return 1; // Mouse must either be held down/dragged some, or this must be // the second click (not the one that popped up the menu): if (!Fl::event_is_click() || p.state == PUSH_STATE || p.menubar && p.current_item && !p.current_item->submenu() // button ) { #if 0 // makes the check/radio items leave the menu up const Fl_Menu_Item* m = p.current_item; if (m && button && (m->flags & (FL_MENU_TOGGLE|FL_MENU_RADIO))) { ((Fl_Menu_*)button)->picked(m); p.p[p.menu_number]->redraw(); } else #endif p.state = DONE_STATE; } return 1; } return Fl_Window::handle(e); } const Fl_Menu_Item* Fl_Menu_Item::pulldown( int X, int Y, int W, int H, const Fl_Menu_Item* initial_item, const Fl_Menu_* pbutton, const Fl_Menu_Item* t, int menubar) const { Fl_Group::current(0); // fix possible user error... button = pbutton; if (pbutton) { for (Fl_Window* w = pbutton->window(); w; w = w->window()) { X += w->x(); Y += w->y(); } } else { X += Fl::event_x_root()-Fl::event_x(); Y += Fl::event_y_root()-Fl::event_y(); } menuwindow mw(this, X, Y, W, H, initial_item, t, menubar); Fl::grab(mw); menustate p; ::p = &p; p.p[0] = &mw; p.nummenus = 1; p.menubar = menubar; p.state = INITIAL_STATE; menuwindow* fakemenu = 0; // kludge for buttons in menubar // preselected item, pop up submenus if necessary: if (initial_item && mw.selected >= 0) { setitem(0, mw.selected); goto STARTUP; } p.current_item = 0; p.menu_number = 0; p.item_number = -1; if (menubar) mw.handle(FL_DRAG); // find the initial menu initial_item = p.current_item; if (initial_item) goto STARTUP; // the main loop, runs until p.state goes to DONE_STATE: for (;;) { // make sure all the menus are shown: {for (int k = menubar; k < p.nummenus; k++) if (!p.p[k]->shown()) { if (p.p[k]->title) p.p[k]->title->show(); p.p[k]->show(); } } // get events: {const Fl_Menu_Item* oldi = p.current_item; Fl::wait(); if (p.state == DONE_STATE) break; // done. if (p.current_item == oldi) continue;} // only do rest if item changes: delete fakemenu; fakemenu = 0; // turn off "menubar button" if (!p.current_item) { // pointing at nothing // turn off selection in deepest menu, but don't erase other menus: p.p[p.nummenus-1]->set_selected(-1); continue; } delete fakemenu; fakemenu = 0; initial_item = 0; // stop the startup code p.p[p.menu_number]->autoscroll(p.item_number); STARTUP: menuwindow& cw = *p.p[p.menu_number]; const Fl_Menu_Item* m = p.current_item; if (!m->activevisible()) { // pointing at inactive item cw.set_selected(-1); initial_item = 0; // turn off startup code continue; } cw.set_selected(p.item_number); if (m==initial_item) initial_item=0; // stop the startup code if item found if (m->submenu()) { const Fl_Menu_Item* title = m; const Fl_Menu_Item* menutable; if (m->flags&FL_SUBMENU) menutable = m+1; else menutable = (Fl_Menu_Item*)(m)->user_data_; // figure out where new menu goes: int nX, nY; if (!p.menu_number && p.menubar) { // menu off a menubar: nX = cw.x() + cw.titlex(p.item_number); nY = cw.y() + cw.h(); initial_item = 0; } else { nX = cw.x() + cw.w(); nY = cw.y() + 1 + p.item_number * cw.itemheight; title = 0; } if (initial_item) { // bring up submenu containing initial item: menuwindow* n = new menuwindow(menutable,X,Y,W,H,initial_item,title); p.p[p.nummenus++] = n; // move all earlier menus to line up with this new one: if (n->selected>=0) { int dy = n->y()-nY; int dx = n->x()-nX; for (int menu = 0; menu <= p.menu_number; menu++) { menuwindow* t = p.p[menu]; int nx = t->x()+dx; if (nx < 0) {nx = 0; dx = -t->x();} int ny = t->y()+dy+1; if (ny < 0) {ny = 0; dy = -t->y()-1;} t->position(nx, ny); } setitem(p.nummenus-1, n->selected); goto STARTUP; } } else if (p.nummenus > p.menu_number+1 && p.p[p.menu_number+1]->menu == menutable) { // the menu is already up: while (p.nummenus > p.menu_number+2) delete p.p[--p.nummenus]; p.p[p.nummenus-1]->set_selected(-1); } else { // delete all the old menus and create new one: while (p.nummenus > p.menu_number+1) delete p.p[--p.nummenus]; p.p[p.nummenus++]= new menuwindow(menutable, nX, nY, title?1:0, 0, 0, title, 0, menubar); } } else { // !m->submenu(): while (p.nummenus > p.menu_number+1) delete p.p[--p.nummenus]; if (!p.menu_number && p.menubar) { // kludge so "menubar buttons" turn "on" by using menu title: fakemenu = new menuwindow(0, cw.x()+cw.titlex(p.item_number), cw.y()+cw.h(), 0, 0, 0, m, 0, 1); fakemenu->title->show(); } } } const Fl_Menu_Item* m = p.current_item; delete fakemenu; while (p.nummenus>1) delete p.p[--p.nummenus]; mw.hide(); Fl::release(); return m; } const Fl_Menu_Item* Fl_Menu_Item::popup( int X, int Y, const char* title, const Fl_Menu_Item* picked, const Fl_Menu_* button ) const { static Fl_Menu_Item dummy; // static so it is all zeros dummy.text = title; return pulldown(X, Y, 0, 0, picked, button, title ? &dummy : 0); } const Fl_Menu_Item* Fl_Menu_Item::test_shortcut() const { const Fl_Menu_Item* m = this; const Fl_Menu_Item* ret = 0; if (m) for (; m->text; m = m->next()) { if (m->activevisible()) { // return immediately any match of an item in top level menu: if (Fl::test_shortcut(m->shortcut_)) return m; // if (Fl_Widget::test_shortcut(m->text)) return m; // only return matches from lower menu if nothing found in top menu: if (!ret && m->submenu()) { const Fl_Menu_Item* s = (m->flags&FL_SUBMENU) ? m+1:(const Fl_Menu_Item*)m->user_data_; ret = s->test_shortcut(); } } } return ret; } // // End of "$Id: Fl_Menu.cxx,v 1.18.2.2 1999/08/09 06:19:33 bill Exp $". //