Initial revision

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

1 files changed, 105 insertions, 0 deletions

diff --git a/src/Fl_Adjuster.cxx b/src/Fl_Adjuster.cxx
new file mode 100644
index 000000000..a9b39d7bf
--- /dev/null
+++ b/src/Fl_Adjuster.cxx
@@ -0,0 +1,105 @@
+// Fl_Adjuster.C
+
+// Fltk widget for drag-adjusting a floating point value.
+
+#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());
+  fl_color(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);
+}
+
+int Fl_Adjuster::handle(int event) {
+  double v;
+  int delta;
+  int mx = Fl::event_x();
+  switch (event) {
+  case FL_PUSH:
+    ix = mx;
+    if (w()>=h())
+      drag = 3*(mx-x())/w() + 1;
+    else
+      drag = 3-3*(Fl::event_y()-y()-1)/h();
+    handle_push();
+    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;
+      }
+      handle_drag(soft() ? softclamp(v) : clamp(v));
+    }
+    drag = 0;
+    redraw();
+    handle_release();
+    return 1;
+  }
+  return 0;
+}
+
+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_BLACK);
+  drag = 0;
+  soft_ = 1;
+}