1 files changed, 73 insertions, 0 deletions
diff --git a/src/Fl_Value_Output.cxx b/src/Fl_Value_Output.cxx
new file mode 100644
index 000000000..8c3f26bcd
--- /dev/null
+++ b/src/Fl_Value_Output.cxx
@@ -0,0 +1,73 @@
+// Fl_Value_Output.C
+
+// Fltk widget for drag-adjusting a floating point value.
+// This is much lighter than Fl_Value_Input because it has no text editor
+// If step() is zero then it can be used to display a floating-point value
+
+#include <FL/Fl.H>
+#include <FL/Fl_Value_Output.H>
+#include <FL/fl_draw.H>
+#include <FL/Fl_Input.H> // for default_font
+
+void Fl_Value_Output::draw() {
+  Fl_Boxtype b = box() ? box() : Fl_Input::default_box();
+  int X = x()+Fl::box_dx(b);
+  int Y = y()+Fl::box_dy(b);
+  int W = w()-Fl::box_dw(b);
+  int H = h()-Fl::box_dh(b);
+  if (damage()&~1)
+    draw_box(b, color());
+  else {
+    fl_color(color());
+    fl_rectf(X, Y, W, H);
+  }
+  char buf[128];
+  format(buf);
+  fl_color(active_r() ? textcolor() : inactive(textcolor()));
+  fl_font(textfont(), textsize(),
+	  Fl_Input::default_font(), Fl_Input::default_size());
+  fl_draw(buf,X+3,Y,W-6,H,FL_ALIGN_LEFT);
+}
+
+int Fl_Value_Output::handle(int event) {
+  if (!step()) return 0;
+  double v;
+  int delta;
+  int mx = Fl::event_x();
+  static int ix, drag;
+  switch (event) {
+  case FL_PUSH:
+    ix = mx;
+    drag = Fl::event_button();
+    handle_push();
+    return 1;
+  case FL_DRAG:
+    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:
+    handle_release();
+    return 1;
+  default:
+    return 0;
+  }
+}
+
+Fl_Value_Output::Fl_Value_Output(int x,int y,int w,int h,const char *l)
+: Fl_Valuator(x,y,w,h,l) {
+  box(FL_NO_BOX);
+  align(FL_ALIGN_LEFT);
+  textfont_ = FL_HELVETICA;
+  textsize_ = FL_NORMAL_SIZE;
+  textcolor_ = FL_BLACK;
+  soft_ = 0;
+}