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// Fl_Value_Input.C
// Fltk widget for drag-adjusting a floating point value.
// Warning: this works by making a child Fl_Input object, even
// though this object is *not* an Fl_Group. May be a kludge?
#include <FL/Fl.H>
#include <FL/Fl_Value_Input.H>
#include <FL/Fl_Group.H>
#include <stdlib.h>
void Fl_Value_Input::input_cb(Fl_Widget*, void* v) {
Fl_Value_Input& t = *(Fl_Value_Input*)v;
double nv;
if (t.step()>=1.0) nv = strtol(t.input.value(), 0, 0);
else nv = strtod(t.input.value(), 0);
t.handle_push();
t.handle_drag(nv);
t.handle_release();
}
void Fl_Value_Input::draw() {
if (damage()&~1) input.clear_damage(~0);
input.box(box());
input.color(color(), selection_color());
input.draw();
input.clear_damage();
}
void Fl_Value_Input::resize(int X, int Y, int W, int H) {
Fl_Valuator::resize(X, Y, W, H);
input.resize(X, Y, W, H);
}
void Fl_Value_Input::value_damage() {
char buf[128];
format(buf);
input.value(buf);
input.mark(input.position()); // turn off selection highlight
}
int Fl_Value_Input::handle(int event) {
double v;
int delta;
int mx = Fl::event_x();
static int ix, drag;
switch (event) {
case FL_PUSH:
if (!step()) goto DEFAULT;
ix = mx;
drag = Fl::event_button();
handle_push();
return 1;
case FL_DRAG:
if (!step()) goto DEFAULT;
delta = Fl::event_x()-ix;
if (delta > 5) delta -= 5;
else if (delta < -5) delta += 5;
else delta = 0;
switch (drag) {
case 3: v = increment(previous_value(), delta*100); break;
case 2: v = increment(previous_value(), delta*10); break;
default:v = increment(previous_value(), delta); break;
}
v = round(v);
handle_drag(soft()?softclamp(v):clamp(v));;
return 1;
case FL_RELEASE:
if (!step()) goto DEFAULT;
if (value() != previous_value() || !Fl::event_is_click())
handle_release();
else {
input.handle(FL_PUSH);
input.handle(FL_RELEASE);
}
return 1;
case FL_FOCUS:
return input.take_focus();
default:
DEFAULT:
input.type(step()>=1.0 ? FL_INT_INPUT : FL_FLOAT_INPUT);
return input.handle(event);
}
}
Fl_Value_Input::Fl_Value_Input(int x, int y, int w, int h, const char* l)
: Fl_Valuator(x, y, w, h, l), input(x, y, w, h, 0) {
soft_ = 0;
if (input.parent()) // defeat automatic-add
((Fl_Group*)input.parent())->remove(input);
input.parent(this); // kludge!
input.callback(input_cb, this);
input.when((Fl_When)(FL_WHEN_RELEASE|FL_WHEN_ENTER_KEY));
box(input.box());
color(input.color());
selection_color(input.selection_color());
align(FL_ALIGN_LEFT);
value_damage();
}
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