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o Added Fl_Tree::item_draw_callback(), letting one define a custom dr…
…aw function for Fl_Tree_Item's. o Added examples/tree-custom-draw-items.cxx to demonstrate its use. o Fixed small doc error for recent Fl_Tree::get_selected_items() git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10018 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // | ||
| // "$Id$" | ||
| // | ||
| // Demonstrate Fl_Tree custom item draw callback. - erco 11/09/2013 | ||
| // | ||
| // Copyright 2013 Greg Ercolano. | ||
| // Copyright 1998-2013 by Bill Spitzak and others. | ||
| // | ||
| // This library is free software. Distribution and use rights are outlined in | ||
| // the file "COPYING" which should have been included with this file. If this | ||
| // file is missing or damaged, see the license at: | ||
| // | ||
| // http://www.fltk.org/COPYING.php | ||
| // | ||
| // Please report all bugs and problems on the following page: | ||
| // | ||
| // http://www.fltk.org/str.php | ||
| // | ||
| #include <stdio.h> | ||
| #include <math.h> // sin(3) | ||
| #include <FL/Fl.H> | ||
| #include <FL/Fl_Double_Window.H> | ||
| #include <FL/Fl_Tree.H> | ||
|
|
||
| #if FLTK_ABI_VERSION >= 10303 | ||
| static void draw_item(Fl_Tree_Item *item, void *data) { | ||
| Fl_Tree *tree = (Fl_Tree*)data; | ||
| int X=item->label_x(), Y=item->label_y(), | ||
| W=item->label_w(), H=item->label_h(); | ||
| // Draw the background | ||
| fl_color(item->is_selected() ? tree->selection_color() : item->labelbgcolor()); | ||
| fl_rectf(X,Y,W,H); | ||
| // Draw some red/grn/blu boxes | ||
| int x = X + 5; | ||
| fl_color(FL_RED); fl_rectf(x, Y+2, 10, H-4); x += 10; | ||
| fl_color(FL_GREEN); fl_rectf(x, Y+2, 10, H-4); x += 10; | ||
| fl_color(FL_BLUE); fl_rectf(x, Y+2, 10, H-4); x += 10; | ||
| x += 5; | ||
| // Draw text | ||
| fl_font(item->labelfont(), item->labelsize()); | ||
| fl_color(item->labelfgcolor()); | ||
| char s[80]; | ||
| sprintf(s, "Custom: '%s'", item->label()?item->label():"---"); | ||
| fl_draw(s, x+tree->labelmarginleft(),Y,W,H, FL_ALIGN_LEFT); | ||
| int fw=0,fh=0; | ||
| fl_measure(s,fw,fh); | ||
| x += fw + 10; | ||
| // Draw a red sine wave past the text to end of xywh area | ||
| fl_color(FL_RED); | ||
| for ( float a=0.0; x<(X+W); x++,a+=.1) { | ||
| int y = Y + sin(a) * ((H-2)/2) + (H/2); | ||
| fl_point(x,y); | ||
| } | ||
| } | ||
|
|
||
| int main(int argc, char *argv[]) { | ||
| Fl::scheme("gtk+"); | ||
| Fl_Double_Window *win = new Fl_Double_Window(250, 400, "Simple Tree"); | ||
| win->begin(); | ||
| { | ||
| // Create the tree | ||
| Fl_Tree *tree = new Fl_Tree(0, 0, win->w(), win->h()); | ||
| tree->showroot(0); // don't show root of tree | ||
| tree->item_draw_callback(draw_item, (void*)tree); // setup a callback for the tree | ||
|
|
||
| // Add some items | ||
| tree->add("Flintstones/Fred"); | ||
| tree->add("Flintstones/Wilma"); | ||
| tree->add("Flintstones/Pebbles"); | ||
| tree->add("Simpsons/Homer"); | ||
| tree->add("Simpsons/Marge"); | ||
| tree->add("Simpsons/Bart"); | ||
| tree->add("Simpsons/Lisa"); | ||
| tree->add("Superjail/Warden"); | ||
| tree->add("Superjail/Jared"); | ||
| tree->add("Superjail/Alice"); | ||
| tree->add("Superjail/Jailbot"); | ||
|
|
||
| // Start with some items closed | ||
| tree->close("Simpsons"); | ||
| tree->close("Superjail"); | ||
| } | ||
| win->end(); | ||
| win->resizable(win); | ||
| win->show(argc, argv); | ||
| return(Fl::run()); | ||
| } | ||
| #else | ||
| #include <FL/Fl.H> | ||
| #include <FL/fl_message.H> | ||
| int main(int, char**) { | ||
| fl_alert("This demo is dependent on an ABI feature.\n" | ||
| "FLTK_ABI_VERSION must be set to 10303 (or higher) in Enumerations.H"); | ||
| return 1; | ||
| } | ||
| #endif | ||
|
|
||
| // | ||
| // End of "$Id$". | ||
| // |
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