Initial revision

git-svn-id: file:///fltk/svn/fltk/trunk@2 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
2026-06-06 08:32:07 +08:00 · 1998-10-06 18:21:25 +00:00
parent 67e89232f9
commit f9039b2ae2
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+/*	fullscreen.C
+
+	This demo shows how to do many of the window manipulations that
+	are popular on SGI programs, even though X does not really like
+	them.  You can toggle the border on/off, change the visual to
+	switch between single/double buffer, and make the window take
+	over the screen.
+
+	Normally the program makes a single window with a child GL window.
+	This simulates a program where the 3D display is surrounded by
+	control knobs.  Running the program with an argument will
+	make it make a seperate GL window from the controls window.  This
+	simulates a (older?) style program where the graphics display is
+	a different window than the controls.
+
+	This program reports how many times it redraws the window to
+	stdout, so you can see how much time it is wasting.  It appears
+	to be impossible to prevent X from sending redundant resize
+	events, so there are extra redraws.  But the way I have the
+	code arranged here seems to be keeping that to a minimu.
+
+	Apparently unavoidable bugs:
+
+	Turning the border on causes an unnecessary redraw.
+
+	Turning off full screen when the border is on causes an unnecessary
+	resize and redraw when the program turns the border on.
+
+	If it is a seperate window, turning double buffering on and off
+	will cause the window to raise, deiconize, and possibly move.  You
+	can avoid this by making the Fl_Gl_Window a child of a normal
+	window.
+
+*/
+
+#include <config.h>
+#include <FL/Fl.H>
+#include <FL/Fl_Single_Window.H>
+#include <FL/Fl_Hor_Slider.H>
+#include <FL/Fl_Toggle_Light_Button.H>
+#include <FL/math.h>
+#include <stdio.h>
+
+#if HAVE_GL
+#include <FL/gl.h>
+#include <FL/Fl_Gl_Window.H>
+
+class shape_window : public Fl_Gl_Window {
+  void draw();
+public:
+  int sides;
+  shape_window(int x,int y,int w,int h,const char *l=0);
+};
+
+shape_window::shape_window(int x,int y,int w,int h,const char *l) :
+Fl_Gl_Window(x,y,w,h,l) {
+  sides = 3;
+}
+
+void shape_window::draw() {
+  printf("drawing size %d %d\n",w(),h());
+  if (!valid()) {
+    valid(1);
+//  printf("init\n");
+    glLoadIdentity();
+    glViewport(0,0,w(),h());
+  }
+  glClear(GL_COLOR_BUFFER_BIT);
+  glColor3f(.5,.6,.7);
+  glBegin(GL_POLYGON);
+  for (int i=0; i<sides; i++) {
+    double ang = i*2*M_PI/sides;
+    glVertex3f(cos(ang),sin(ang),0);
+  }
+  glEnd();
+}
+
+#else
+
+#include <FL/fl_draw.H>
+
+class shape_window : public Fl_Window {
+  void draw();
+public:
+  int sides;
+  shape_window(int x,int y,int w,int h,const char *l=0);
+};
+
+shape_window::shape_window(int x,int y,int w,int h,const char *l) :
+Fl_Window(x,y,w,h,l) {
+  sides = 3;
+}
+
+void shape_window::draw() {
+  fl_color(0);
+  fl_rectf(0,0,w(),h());
+  fl_font(0,20);
+  fl_color(7);
+  fl_draw("This requires GL",0,0,w(),h(),FL_ALIGN_CENTER);
+}
+
+#endif
+
+void sides_cb(Fl_Widget *o, void *p) {
+  shape_window *sw = (shape_window *)p;
+  sw->sides = int(((Fl_Slider *)o)->value());
+  sw->redraw();
+}
+
+#if HAVE_GL
+void double_cb(Fl_Widget *o, void *p) {
+  shape_window *sw = (shape_window *)p;
+  int d = ((Fl_Button *)o)->value();
+  sw->mode(d ? Fl_Mode(FL_DOUBLE|FL_RGB) : FL_RGB);
+}
+#else
+void double_cb(Fl_Widget *, void *) {}
+#endif
+
+void border_cb(Fl_Widget *o, void *p) {
+  Fl_Window *w = (Fl_Window *)p;
+  int d = ((Fl_Button *)o)->value();
+  w->border(d);
+}
+
+int px,py,pw,ph;
+Fl_Button *border_button;
+void fullscreen_cb(Fl_Widget *o, void *p) {
+  Fl_Window *w = (Fl_Window *)p;
+  int d = ((Fl_Button *)o)->value();
+  if (d) {
+    px = w->x();
+    py = w->y();
+    pw = w->w();
+    ph = w->h();
+    w->fullscreen();
+  } else {
+    w->fullscreen_off(px,py,pw,ph);
+  }
+}
+
+#include <stdlib.h>
+
+void exit_cb(Fl_Widget *, void *) {
+  exit(0);
+}
+
+#define NUMB 5
+
+int twowindow = 0;
+int initfull = 0;
+int arg(int, char **argv, int &i) {
+  if (argv[i][1] == '2') {twowindow = 1; i++; return 1;}
+  if (argv[i][1] == 'f') {initfull = 1; i++; return 1;}
+  return 0;
+}
+
+int main(int argc, char **argv) {
+
+  int i=0;
+  if (Fl::args(argc,argv,i,arg) < argc)
+    Fl::fatal("Options are:\n -2 = 2 windows\n -f = startup fullscreen\n%s",Fl::help);
+
+  Fl_Single_Window window(300,300+30*NUMB); window.end();
+
+  shape_window sw(10,10,window.w()-20,window.h()-30*NUMB-20);
+#if HAVE_GL
+  sw.mode(FL_RGB);
+#endif
+
+  Fl_Window *w;
+  if (twowindow) {	// make it's own window
+    sw.resizable(&sw);
+    w = &sw;
+    window.set_modal();	// makes controls stay on top when fullscreen pushed
+    argc--;
+    sw.show();
+  } else {		// otherwise make a subwindow
+    window.add(sw);
+    window.resizable(&sw);
+    w = &window;
+  }
+
+  window.begin();
+
+  int y = window.h()-30*NUMB-5;
+  Fl_Hor_Slider slider(50,y,window.w()-60,30,"Sides:");
+  slider.align(FL_ALIGN_LEFT);
+  slider.callback(sides_cb,&sw);
+  slider.value(sw.sides);
+  slider.step(1);
+  slider.bounds(3,40);
+  y+=30;
+
+  Fl_Toggle_Light_Button b1(50,y,window.w()-60,30,"Double Buffered");
+  b1.callback(double_cb,&sw);
+  y+=30;
+
+  Fl_Toggle_Light_Button b2(50,y,window.w()-60,30,"Border");
+  b2.callback(border_cb,w);
+  b2.set();
+  border_button = &b2;
+  y+=30;
+
+  Fl_Toggle_Light_Button b3(50,y,window.w()-60,30,"FullScreen");
+  b3.callback(fullscreen_cb,w);
+  y+=30;
+
+  Fl_Button eb(50,y,window.w()-60,30,"Exit");
+  eb.callback(exit_cb);
+  y+=30;
+
+  if (initfull) {b3.set(); b3.do_callback();}
+
+  window.end();
+  window.show(argc,argv);
+
+  return Fl::run();
+}