ref: 9eaba52cafcac7c2f3bfc72d7be1f15893196be1
dir: /DoConfig/fltk/src/Fl_Adjuster.cxx/
//
// "$Id$"
//
// Adjuster widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2011 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 <FL/Fl.H>
#include <FL/Fl_Adjuster.H>
#include <FL/Fl_Bitmap.H>
#include <FL/fl_draw.H>
#include "fastarrow.h"
static Fl_Bitmap fastarrow(fastarrow_bits, fastarrow_width, fastarrow_height);
#include "mediumarrow.h"
static Fl_Bitmap mediumarrow(mediumarrow_bits, mediumarrow_width, mediumarrow_height);
#include "slowarrow.h"
static Fl_Bitmap slowarrow(slowarrow_bits, slowarrow_width, slowarrow_height);
// changing the value does not change the appearance:
void Fl_Adjuster::value_damage() {}
void Fl_Adjuster::draw() {
int dx, dy, W, H;
if (w()>=h()) {
dx = W = w()/3;
dy = 0; H = h();
} else {
dx = 0; W = w();
dy = H = h()/3;
}
draw_box(drag==1?FL_DOWN_BOX:box(), x(), y()+2*dy, W, H, color());
draw_box(drag==2?FL_DOWN_BOX:box(), x()+dx, y()+dy, W, H, color());
draw_box(drag==3?FL_DOWN_BOX:box(), x()+2*dx, y(), W, H, color());
if (active_r())
fl_color(selection_color());
else
fl_color(fl_inactive(selection_color()));
fastarrow.draw(x()+(W-fastarrow_width)/2,
y()+2*dy+(H-fastarrow_height)/2, W, H);
mediumarrow.draw(x()+dx+(W-mediumarrow_width)/2,
y()+dy+(H-mediumarrow_height)/2, W, H);
slowarrow.draw(x()+2*dx+(W-slowarrow_width)/2,
y()+(H-slowarrow_width)/2, W, H);
if (Fl::focus() == this) draw_focus();
}
int Fl_Adjuster::handle(int event) {
double v;
int delta;
int mx = Fl::event_x();
// Fl_Widget_Tracker wp(this);
switch (event) {
case FL_PUSH:
if (Fl::visible_focus()) Fl::focus(this);
ix = mx;
if (w()>=h())
drag = 3*(mx-x())/w() + 1;
else
drag = 3-3*(Fl::event_y()-y()-1)/h();
{ Fl_Widget_Tracker wp(this);
handle_push();
if (wp.deleted()) return 1;
}
redraw();
return 1;
case FL_DRAG:
if (w() >= h()) {
delta = x()+(drag-1)*w()/3; // left edge of button
if (mx < delta)
delta = mx-delta;
else if (mx > (delta+w()/3)) // right edge of button
delta = mx-delta-w()/3;
else
delta = 0;
} else {
if (mx < x())
delta = mx-x();
else if (mx > (x()+w()))
delta = mx-x()-w();
else
delta = 0;
}
switch (drag) {
case 3: v = increment(previous_value(), delta); break;
case 2: v = increment(previous_value(), delta*10); break;
default:v = increment(previous_value(), delta*100); break;
}
handle_drag(soft() ? softclamp(v) : clamp(v));
return 1;
case FL_RELEASE:
if (Fl::event_is_click()) { // detect click but no drag
if (Fl::event_state()&0xF0000) delta = -10;
else delta = 10;
switch (drag) {
case 3: v = increment(previous_value(), delta); break;
case 2: v = increment(previous_value(), delta*10); break;
default:v = increment(previous_value(), delta*100); break;
}
Fl_Widget_Tracker wp(this);
handle_drag(soft() ? softclamp(v) : clamp(v));
if (wp.deleted()) return 1;
}
drag = 0;
redraw();
handle_release();
return 1;
case FL_KEYBOARD :
switch (Fl::event_key()) {
case FL_Up:
if (w() > h()) return 0;
handle_drag(clamp(increment(value(),-1)));
return 1;
case FL_Down:
if (w() > h()) return 0;
handle_drag(clamp(increment(value(),1)));
return 1;
case FL_Left:
if (w() < h()) return 0;
handle_drag(clamp(increment(value(),-1)));
return 1;
case FL_Right:
if (w() < h()) return 0;
handle_drag(clamp(increment(value(),1)));
return 1;
default:
return 0;
}
// break not required because of switch...
case FL_FOCUS:
case FL_UNFOCUS:
if (Fl::visible_focus()) {
redraw();
return 1;
} else return 0;
case FL_ENTER :
case FL_LEAVE :
return 1;
}
return 0;
}
/**
Creates a new Fl_Adjuster widget using the given position,
size, and label string. It looks best if one of the dimensions is 3
times the other.
<P> Inherited destructor destroys the Valuator.
*/
Fl_Adjuster::Fl_Adjuster(int X, int Y, int W, int H, const char* l)
: Fl_Valuator(X, Y, W, H, l) {
box(FL_UP_BOX);
step(1, 10000);
selection_color(FL_SELECTION_COLOR);
drag = 0;
soft_ = 1;
}
//
// End of "$Id$".
//