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//
// "$Id: Fl_Tooltip.cxx,v 1.38.2.28 2003/09/14 14:11:06 easysw Exp $"
//
// Tooltip source file 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".
//
#include <FL/Fl_Tooltip.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Menu_Window.H>
#include <stdio.h>
float Fl_Tooltip::delay_ = 1.0f;
float Fl_Tooltip::hoverdelay_ = 0.2f;
int Fl_Tooltip::enabled_ = 1;
unsigned Fl_Tooltip::color_ = fl_color_cube(FL_NUM_RED - 1,
FL_NUM_GREEN - 1,
FL_NUM_BLUE - 2);
unsigned Fl_Tooltip::textcolor_ = FL_BLACK;
int Fl_Tooltip::font_ = FL_HELVETICA;
int Fl_Tooltip::size_ = FL_NORMAL_SIZE;
#define MAX_WIDTH 400
static const char* tip;
class Fl_TooltipBox : public Fl_Menu_Window {
public:
Fl_TooltipBox() : Fl_Menu_Window(0, 0) {
set_override();
end();
}
void draw();
void layout();
void show() {
if (tip) Fl_Menu_Window::show();
}
};
Fl_Widget* Fl_Tooltip::widget_ = 0;
static Fl_TooltipBox *window = 0;
static int X,Y,W,H;
void Fl_TooltipBox::layout() {
fl_font(Fl_Tooltip::font(), Fl_Tooltip::size());
int ww, hh;
ww = MAX_WIDTH;
fl_measure(tip, ww, hh, FL_ALIGN_LEFT|FL_ALIGN_WRAP|FL_ALIGN_INSIDE);
ww += 6; hh += 6;
// find position on the screen of the widget:
int ox = Fl::event_x_root();
//int ox = X+W/2;
int oy = Y + H+2;
for (Fl_Widget* p = Fl_Tooltip::current(); p; p = p->window()) {
//ox += p->x();
oy += p->y();
}
if (ox+ww > Fl::w()) ox = Fl::w() - ww;
if (ox < 0) ox = 0;
if (H > 30) {
oy = Fl::event_y_root()+13;
if (oy+hh > Fl::h()) oy -= 23+hh;
} else {
if (oy+hh > Fl::h()) oy -= (4+hh+H);
}
if (oy < 0) oy = 0;
resize(ox, oy, ww, hh);
}
void Fl_TooltipBox::draw() {
draw_box(FL_BORDER_BOX, 0, 0, w(), h(), Fl_Tooltip::color());
fl_color(Fl_Tooltip::textcolor());
fl_font(Fl_Tooltip::font(), Fl_Tooltip::size());
fl_draw(tip, 3, 3, w()-6, h()-6, Fl_Align(FL_ALIGN_LEFT|FL_ALIGN_WRAP));
}
static char recent_tooltip;
static void recent_timeout(void*) {
recent_tooltip = 0;
}
static char recursion;
static void tooltip_timeout(void*) {
if (recursion) return;
recursion = 1;
if (!tip || !*tip) {
if (window) window->hide();
} else {
//if (Fl::grab()) return;
if (!window) window = new Fl_TooltipBox;
// this cast bypasses the normal Fl_Window label() code:
((Fl_Widget*)window)->label(tip);
window->layout();
window->redraw();
// printf("tooltip_timeout: Showing window %p with tooltip \"%s\"...\n",
// window, tip ? tip : "(null)");
window->show();
}
Fl::remove_timeout(recent_timeout);
recent_tooltip = 1;
recursion = 0;
}
// Acts as though enter(widget) was done but does not pop up a
// tooltip. This is useful to prevent a tooltip from reappearing when
// a modal overlapping window is deleted. Fltk does this automatically
// when you click the mouse button.
void Fl_Tooltip::current(Fl_Widget* w) {
enter(0);
// find the enclosing group with a tooltip:
Fl_Widget* tw = w;
for (;;) {
if (!tw) return;
if (tw->tooltip()) break;
tw = tw->parent();
}
// act just like tt_enter() except we can remember a zero:
widget_ = w;
}
// This is called when a widget is destroyed:
static void
tt_exit(Fl_Widget *w) {
#ifdef DEBUG
printf("tt_exit(w=%p)\n", w);
printf(" widget=%p, window=%p\n", Fl_Tooltip::current(), window);
#endif // DEBUG
if (!Fl_Tooltip::current()) return;
Fl_Tooltip::current(0);
Fl::remove_timeout(tooltip_timeout);
Fl::remove_timeout(recent_timeout);
if (window) window->hide();
if (recent_tooltip) {
if (Fl::event_state() & FL_BUTTONS) recent_tooltip = 0;
else Fl::add_timeout(Fl_Tooltip::hoverdelay(), recent_timeout);
}
}
static void
tt_enter(Fl_Widget* wp) {
#ifdef DEBUG
printf("tt_enter(wp=%p)\n", wp);
printf(" window=%p\n", window);
#endif // DEBUG
// find the enclosing group with a tooltip:
Fl_Widget* w = wp;
while (w && !w->tooltip()) {
//if (w == window) return; // don't do anything if pointed at tooltip
w = w->parent();
}
if (!w) {
Fl_Tooltip::enter_area(0, 0, 0, 0, 0, 0);
} else {
Fl_Tooltip::enter_area(w,0,0,w->w(), w->h(), w->tooltip());
}
}
void
Fl_Tooltip::enter_area(Fl_Widget* wid, int x,int y,int w,int h, const char* t)
{
#ifdef DEBUG
printf("Fl_Tooltip::enter_area(wid=%p, x=%d, y=%d, w=%d, h=%d, t=\"%s\")\n",
wid, x, y, w, h, t ? t : "(null)");
printf(" recursion=%d, window=%p\n", recursion, window);
#endif // DEBUG
if (recursion) return;
if (!t || !*t || !enabled()) {
if (window) window->hide();
Fl::remove_timeout(tooltip_timeout);
Fl::remove_timeout(recent_timeout);
return;
}
// do nothing if it is the same:
if (wid==widget_ && x==X && y==Y && w==W && h==H && t==tip) return;
Fl::remove_timeout(tooltip_timeout);
Fl::remove_timeout(recent_timeout);
// remember it:
widget_ = wid; X = x; Y = y; W = w; H = h; tip = t;
// popup the tooltip immediately if it was recently up:
if (recent_tooltip) {
if (window) window->hide();
Fl::add_timeout(Fl_Tooltip::hoverdelay(), tooltip_timeout);
} else if (Fl_Tooltip::delay() < .1) {
#ifdef WIN32
// possible fix for the Windows titlebar, it seems to want the
// window to be destroyed, moving it messes up the parenting:
if (window) window->hide();
#endif
tooltip_timeout(0);
} else {
if (window) window->hide();
Fl::add_timeout(Fl_Tooltip::delay(), tooltip_timeout);
}
#ifdef DEBUG
printf(" tip=\"%s\", window->shown()=%d\n", tip ? tip : "(null)",
window ? window->shown() : 0);
#endif // DEBUG
}
void Fl_Widget::tooltip(const char *tt) {
static char beenhere = 0;
if (!beenhere) {
beenhere = 1;
Fl_Tooltip::enter = tt_enter;
Fl_Tooltip::exit = tt_exit;
}
tooltip_ = tt;
}
//
// End of "$Id: Fl_Tooltip.cxx,v 1.38.2.28 2003/09/14 14:11:06 easysw Exp $".
//
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