// // "$Id: Fl_Tabs.cxx,v 1.6.2.10.2.17 2003/01/30 21:42:46 easysw Exp $" // // Tab widget for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2003 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@fltk.org". // // This is the "file card tabs" interface to allow you to put lots and lots // of buttons and switches in a panel, as popularized by many toolkits. // Each child widget is a card, and it's label() is printed on the card tab. // Clicking the tab makes that card visible. #include #include #include #include #define BORDER 2 #define EXTRASPACE 10 // return the left edges of each tab (plus a fake left edge for a tab // past the right-hand one). These position are actually of the left // edge of the slope. They are either seperated by the correct distance // or by EXTRASPACE or by zero. // Return value is the index of the selected item. int Fl_Tabs::tab_positions(int* p, int* wp) { int selected = 0; Fl_Widget*const* a = array(); int i; p[0] = 0; for (i=0; ivisible()) selected = i; int wt = 0; int ht = 0; o->measure_label(wt,ht); wp[i] = wt+EXTRASPACE; p[i+1] = p[i]+wp[i]+BORDER; } int r = w(); if (p[i] <= r) return selected; // uh oh, they are too big: // pack them against right edge: p[i] = r; for (i = children(); i--;) { int l = r-wp[i]; if (p[i+1] < l) l = p[i+1]; if (p[i] <= l) break; p[i] = l; r -= EXTRASPACE; } // pack them against left edge and truncate width if they still don't fit: for (i = 0; i= i*EXTRASPACE) break; p[i] = i*EXTRASPACE; int W = w()-1-EXTRASPACE*(children()-i) - p[i]; if (wp[i] > W) wp[i] = W; } // adjust edges according to visiblity: for (i = children(); i > selected; i--) { p[i] = p[i-1]+wp[i-1]; } return selected; } // return space needed for tabs. Negative to put them on the bottom: int Fl_Tabs::tab_height() { int H = h(); int H2 = y(); Fl_Widget*const* a = array(); for (int i=children(); i--;) { Fl_Widget* o = *a++; if (o->y() < y()+H) H = o->y()-y(); if (o->y()+o->h() > H2) H2 = o->y()+o->h(); } H2 = y()+h()-H2; if (H2 > H) return (H2 <= 0) ? 0 : -H2; else return (H <= 0) ? 0 : H; } // this is used by fluid to pick tabs: Fl_Widget *Fl_Tabs::which(int event_x, int event_y) { int H = tab_height(); if (H < 0) { if (event_y > y()+h() || event_y < y()+h()+H) return 0; } else { if (event_y > y()+H || event_y < y()) return 0; } if (event_x < x()) return 0; int p[128], wp[128]; tab_positions(p, wp); for (int i=0; i= 0) { if (Fl::event_y() > y()+H) return Fl_Group::handle(event); } else { if (Fl::event_y() < y()+h()+H) return Fl_Group::handle(event); }} case FL_DRAG: case FL_RELEASE: o = which(Fl::event_x(), Fl::event_y()); if (event == FL_RELEASE) {push(0); if (o && value(o)) do_callback();} else push(o); if (Fl::visible_focus() && event == FL_RELEASE) Fl::focus(this); return 1; case FL_FOCUS: case FL_UNFOCUS: if (!Fl::visible_focus()) return Fl_Group::handle(event); if (Fl::event() == FL_RELEASE || Fl::event() == FL_SHORTCUT || Fl::event() == FL_KEYBOARD) { int H = tab_height(); if (H >= 0) { H += Fl::box_dy(box()); damage(FL_DAMAGE_SCROLL, x(), y(), w(), H); } else { H = Fl::box_dy(box()) - H; damage(FL_DAMAGE_SCROLL, x(), y() + h() - H, w(), H); } return 1; } else return Fl_Group::handle(event); case FL_KEYBOARD: switch (Fl::event_key()) { case FL_Left: if (child(0)->visible()) return 0; for (i = 1; i < children(); i ++) if (child(i)->visible()) break; value(child(i - 1)); do_callback(); return 1; case FL_Right: if (child(children() - 1)->visible()) return 0; for (i = 0; i < children(); i ++) if (child(i)->visible()) break; value(child(i + 1)); do_callback(); return 1; case FL_Down: redraw(); return Fl_Group::handle(FL_FOCUS); default: break; } default: return Fl_Group::handle(event); } } int Fl_Tabs::push(Fl_Widget *o) { if (push_ == o) return 0; if (push_ && !push_->visible() || o && !o->visible()) redraw(); push_ = o; return 1; } // The value() is the first visible child (or the last child if none // are visible) and this also hides any other children. // This allows the tabs to be deleted, moved to other groups, and // show()/hide() called without it screwing up. Fl_Widget* Fl_Tabs::value() { Fl_Widget* v = 0; Fl_Widget*const* a = array(); for (int i=children(); i--;) { Fl_Widget* o = *a++; if (v) o->hide(); else if (o->visible()) v = o; else if (!i) {o->show(); v = o;} } return v; } // Setting the value hides all other children, and makes this one // visible, iff it is really a child: int Fl_Tabs::value(Fl_Widget *newvalue) { Fl_Widget*const* a = array(); int ret = 0; for (int i=children(); i--;) { Fl_Widget* o = *a++; if (o == newvalue) { if (!o->visible()) ret = 1; o->show(); } else { o->hide(); } } return ret; } enum {LEFT, RIGHT, SELECTED}; void Fl_Tabs::draw() { Fl_Widget *v = value(); int H = tab_height(); if (damage() & FL_DAMAGE_ALL) { // redraw the entire thing: draw_box(box(), x(), y()+(H>=0?H:0), w(), h()-(H>=0?H:-H), v ? v->color() : color()); if (v) draw_child(*v); } else { // redraw the child if (v) update_child(*v); } if (damage() & (FL_DAMAGE_SCROLL|FL_DAMAGE_ALL)) { int p[128]; int wp[128]; int selected = tab_positions(p,wp); int i; Fl_Widget*const* a = array(); for (i=0; i selected; i--) draw_tab(x()+p[i], x()+p[i+1], wp[i], H, a[i], RIGHT); if (v) { i = selected; draw_tab(x()+p[i], x()+p[i+1], wp[i], H, a[i], SELECTED); } } } void Fl_Tabs::draw_tab(int x1, int x2, int W, int H, Fl_Widget* o, int what) { int sel = (what == SELECTED); int dh = Fl::box_dh(box()); int dy = Fl::box_dy(box()); if ((x2 < x1+W) && what == RIGHT) x1 = x2 - W; if (H >= 0) { if (sel) fl_clip(x1, y(), x2 - x1, H + dh - dy); else fl_clip(x1, y(), x2 - x1, H); H += dh; draw_box(box(), x1, y(), W, H, sel ? fl_color_average(selection_color(), o->selection_color(), 0.5f) : o->selection_color()); o->draw_label(x1, y(), W, H, FL_ALIGN_CENTER); if (Fl::focus() == this && o->visible()) draw_focus(box(), x1, y(), W, H); fl_pop_clip(); } else { H = -H; if (sel) fl_clip(x1, y() + h() - H - dy, x2 - x1, H + dy); else fl_clip(x1, y() + h() - H, x2 - x1, H); H += dh; draw_box(box(), x1, y() + h() - H, W, H, sel ? fl_color_average(selection_color(), o->selection_color(), 0.5f) : o->selection_color()); o->draw_label(x1, y() + h() - H, W, H, FL_ALIGN_CENTER); if (Fl::focus() == this && o->visible()) draw_focus(box(), x1, y() + h() - H, W, H); fl_pop_clip(); } } Fl_Tabs::Fl_Tabs(int X,int Y,int W, int H, const char *l) : Fl_Group(X,Y,W,H,l) { box(FL_THIN_UP_BOX); push_ = 0; } // // End of "$Id: Fl_Tabs.cxx,v 1.6.2.10.2.17 2003/01/30 21:42:46 easysw Exp $". //