Initial revision

git-svn-id: file:///fltk/svn/fltk/trunk@2 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 100 insertions, 0 deletions

diff --git a/src/Fl_Value_Input.cxx b/src/Fl_Value_Input.cxx
new file mode 100644
index 000000000..c9cf28db1
--- /dev/null
+++ b/src/Fl_Value_Input.cxx
@@ -0,0 +1,100 @@
+// 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();
+}