1 files changed, 82 insertions, 0 deletions
diff --git a/gr-qtgui/src/python/forms/forms.py b/gr-qtgui/src/python/forms/forms.py
new file mode 100644
index 000000000..c6b7c9fcf
--- /dev/null
+++ b/gr-qtgui/src/python/forms/forms.py
@@ -0,0 +1,82 @@
+#
+# Copyright 2010 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from PyQt4 import QtGui
+from PyQt4 import QtCore
+
+import converters
+
+class _form_base(QtGui.QWidget):
+    def __init__(self, parent=None, converter=None, callback=None, value=None):
+        QtGui.QWidget.__init__(self, parent)
+        self._converter = converter
+        self._callback = callback
+        self.set_value(value)
+
+    def get_value(self):
+        return self._value
+
+    def set_value(self, value):
+        self._value = value
+        self._base_update(self._converter.external_to_internal(value))
+
+    def _base_update(self, int_val):
+        self._update(int_val)
+
+    def _base_handle(self, int_val):
+        self._value = self._converter.internal_to_external(int_val)
+        if self._callback: self._callback(self._value)
+
+class _slider_base(_form_base):
+    def __init__(self, label='', length=-1, num_steps=100, orient=QtCore.Qt.Horizontal, **kwargs):
+        _form_base.__init__(self, **kwargs)
+        self._slider = QtGui.QSlider(parent=self)
+        self._slider.setOrientation(orient)
+        self._slider.setRange(0, num_steps)
+        if length > 0:
+            if orient == QtCore.Qt.Horizontal:
+                slider_size = self._slider.setWidth(length)
+            if orient == QtCore.Qt.Vertical:
+                slider_size = self._slider.setHeight(length)
+        self.slider.valueChanged.connect(self._handle)
+
+    def _handle(self, event): self._base_handle(self._slider.value())
+    def _update(self, value): self._slider.setValue(int(round(value)))
+
+class slider(_slider_base):
+    """
+    A generic linear slider.
+    @param parent the parent widget
+    @param value the default value
+    @param label title label for this widget (optional)
+    @param length the length of the slider in px (optional)
+    @param orient Qt.Horizontal Veritcal (default=horizontal)
+    @param start the start value
+    @param stop the stop value
+    @param num_steps the number of slider steps (or specify step_size)
+    @param step_size the step between slider jumps (or specify num_steps)
+    @param cast a cast function, int, or float (default=float)
+    """
+    def __init__(self, start, stop, num_steps=100, step_size=None, cast=float, **kwargs):
+        assert step_size or num_steps
+        if step_size is not None: num_steps = (stop - start)/step_size
+        converter = converters.slider_converter(start=start, stop=stop, num_steps=num_steps, cast=cast)
+        _slider_base.__init__(self, converter=converter, num_steps=num_steps, **kwargs)