124 lines
3.5 KiB
C++
124 lines
3.5 KiB
C++
//
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// Menu button widget for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2022 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include <FL/Fl.H>
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#include <FL/Fl_Menu_Button.H>
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#include <FL/Fl_Rect.H>
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#include <FL/fl_draw.H>
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Fl_Menu_Button* Fl_Menu_Button::pressed_menu_button_ = NULL;
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void Fl_Menu_Button::draw() {
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if (!box() || type()) return;
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// calculate position and size of virtual "arrow box" (choice button)
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int ah = h() - Fl::box_dh(box());
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int aw = ah > 20 ? 20 : ah; // limit width: don't waste space for button
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int ax = x() + w() - Fl::box_dx(box()) - aw;
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int ay = y() + (h() - ah) / 2;
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// the remaining space is used to draw the label
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draw_box(pressed_menu_button_ == this ? fl_down(box()) : box(), color());
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draw_label(x() + Fl::box_dx(box()), y(), w() - Fl::box_dw(box()) - aw, h());
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if (Fl::focus() == this) draw_focus();
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// draw the arrow (choice button)
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Fl_Color arrow_color = active_r() ? FL_DARK3 : fl_inactive(FL_DARK3);
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fl_draw_arrow(Fl_Rect(ax, ay, aw, ah), FL_ARROW_SINGLE, FL_ORIENT_DOWN, arrow_color);
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}
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/**
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Act exactly as though the user clicked the button or typed the
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shortcut key. The menu appears, it waits for the user to pick an item,
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and if they pick one it sets value() and does the callback or
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sets changed() as described above. The menu item is returned
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or NULL if the user dismisses the menu.
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\note Since FLTK 1.4.0 Fl_Menu_::menu_end() is called before the menu
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pops up to make sure the menu array is located in private storage.
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\see Fl_Menu_::menu_end()
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*/
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const Fl_Menu_Item* Fl_Menu_Button::popup() {
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menu_end();
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const Fl_Menu_Item* m;
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pressed_menu_button_ = this;
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redraw();
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Fl_Widget_Tracker mb(this);
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if (!box() || type()) {
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m = menu()->popup(Fl::event_x(), Fl::event_y(), label(), mvalue(), this);
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} else {
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m = menu()->pulldown(x(), y(), w(), h(), 0, this);
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}
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picked(m);
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pressed_menu_button_ = 0;
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if (mb.exists()) redraw();
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return m;
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}
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int Fl_Menu_Button::handle(int e) {
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if (!menu() || !menu()->text) return 0;
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switch (e) {
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case FL_ENTER: /* FALLTHROUGH */
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case FL_LEAVE:
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return (box() && !type()) ? 1 : 0;
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case FL_PUSH:
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if (!box()) {
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if (Fl::event_button() != 3) return 0;
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} else if (type()) {
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if (!(type() & (1 << (Fl::event_button()-1)))) return 0;
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}
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if (Fl::visible_focus()) Fl::focus(this);
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popup();
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return 1;
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case FL_KEYBOARD:
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if (!box()) return 0;
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if (Fl::event_key() == ' ' &&
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!(Fl::event_state() & (FL_SHIFT | FL_CTRL | FL_ALT | FL_META))) {
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popup();
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return 1;
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} else return 0;
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case FL_SHORTCUT:
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if (Fl_Widget::test_shortcut()) {popup(); return 1;}
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return test_shortcut() != 0;
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case FL_FOCUS: /* FALLTHROUGH */
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case FL_UNFOCUS:
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if (box() && Fl::visible_focus()) {
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redraw();
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return 1;
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}
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default:
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return 0;
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}
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}
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/**
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Creates a new Fl_Menu_Button widget using the given position,
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size, and label string. The default boxtype is FL_UP_BOX.
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<P>The constructor sets menu() to NULL. See
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Fl_Menu_ for the methods to set or change the menu.
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*/
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Fl_Menu_Button::Fl_Menu_Button(int X,int Y,int W,int H,const char *l)
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: Fl_Menu_(X,Y,W,H,l) {
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down_box(FL_NO_BOX);
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}
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