// // "$Id: Fl_Overlay_Window.cxx,v 1.7.2.4 2000/11/20 19:02:20 easysw Exp $" // // Overlay window code for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2000 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". // // A window using double-buffering and able to draw an overlay // on top of that. Uses the hardware to draw the overlay if // possible, otherwise it just draws in the front buffer. #include #include #include #include #include void Fl_Overlay_Window::show() { Fl_Double_Window::show(); if (overlay_ && overlay_ != this) overlay_->show(); } void Fl_Overlay_Window::hide() { Fl_Double_Window::hide(); } void Fl_Overlay_Window::flush() { int erase_overlay = (damage()&FL_DAMAGE_OVERLAY); clear_damage(damage()&~FL_DAMAGE_OVERLAY); Fl_Double_Window::flush(erase_overlay); if (overlay_ == this) draw_overlay(); } void Fl_Overlay_Window::resize(int X, int Y, int W, int H) { Fl_Double_Window::resize(X,Y,W,H); if (overlay_ && overlay_!=this) overlay_->resize(0,0,w(),h()); } Fl_Overlay_Window::~Fl_Overlay_Window() { hide(); // delete overlay; this is done by ~Fl_Group } #if !HAVE_OVERLAY int Fl_Overlay_Window::can_do_overlay() {return 0;} void Fl_Overlay_Window::redraw_overlay() { overlay_ = this; clear_damage(damage()|FL_DAMAGE_OVERLAY); Fl::damage(FL_DAMAGE_CHILD); } #else extern XVisualInfo *fl_find_overlay_visual(); extern XVisualInfo *fl_overlay_visual; extern Colormap fl_overlay_colormap; extern unsigned long fl_transparent_pixel; static GC gc; // the GC used by all X windows extern uchar fl_overlay; // changes how fl_color(x) works class _Fl_Overlay : public Fl_Window { friend class Fl_Overlay_Window; void flush(); void show(); public: _Fl_Overlay(int x, int y, int w, int h) : Fl_Window(x,y,w,h) {set_flag(INACTIVE);} }; int Fl_Overlay_Window::can_do_overlay() { return fl_find_overlay_visual() != 0; } void _Fl_Overlay::show() { if (shown()) {Fl_Window::show(); return;} fl_background_pixel = int(fl_transparent_pixel); Fl_X::make_xid(this, fl_overlay_visual, fl_overlay_colormap); fl_background_pixel = -1; // find the outermost window to tell wm about the colormap: Fl_Window *w = window(); for (;;) {Fl_Window *w1 = w->window(); if (!w1) break; w = w1;} XSetWMColormapWindows(fl_display, fl_xid(w), &(Fl_X::i(this)->xid), 1); } void _Fl_Overlay::flush() { fl_window = fl_xid(this); if (!gc) gc = XCreateGC(fl_display, fl_xid(this), 0, 0); fl_gc = gc; fl_overlay = 1; Fl_Overlay_Window *w = (Fl_Overlay_Window *)parent(); Fl_X *myi = Fl_X::i(this); if (damage() != FL_DAMAGE_EXPOSE) XClearWindow(fl_display, fl_xid(this)); fl_clip_region(myi->region); myi->region = 0; w->draw_overlay(); fl_overlay = 0; } void Fl_Overlay_Window::redraw_overlay() { if (!fl_display) return; // this prevents fluid -c from opening display if (!overlay_) { if (can_do_overlay()) { Fl_Group::current(this); overlay_ = new _Fl_Overlay(0,0,w(),h()); Fl_Group::current(0); } else { overlay_ = this; // fake the overlay } } if (shown()) { if (overlay_ == this) { clear_damage(damage()|FL_DAMAGE_OVERLAY); Fl::damage(FL_DAMAGE_CHILD); } else if (!overlay_->shown()) overlay_->show(); else overlay_->redraw(); } } #endif // // End of "$Id: Fl_Overlay_Window.cxx,v 1.7.2.4 2000/11/20 19:02:20 easysw Exp $". //