[gnue] r8782 - trunk/gnue-forms/src/uidrivers/qt3/widgets

[johannes]

Author: johannes
Date: 2006-10-13 05:29:45 -0500 (Fri, 13 Oct 2006)
New Revision: 8782

Added:
   trunk/gnue-forms/src/uidrivers/qt3/widgets/image.py
Log:
added image widget


Added: trunk/gnue-forms/src/uidrivers/qt3/widgets/image.py
===================================================================
--- trunk/gnue-forms/src/uidrivers/qt3/widgets/image.py 2006-10-13 09:41:42 UTC 
(rev 8781)
+++ trunk/gnue-forms/src/uidrivers/qt3/widgets/image.py 2006-10-13 10:29:45 UTC 
(rev 8782)
@@ -0,0 +1,154 @@
+# GNU Enterprise Forms - QT3 UI driver - Image widget
+#
+# Copyright 2001-2006 Free Software Foundation
+#
+# This file is part of GNU Enterprise
+#
+# GNU Enterprise 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 2, or (at your option) any later version.
+#
+# GNU Enterprise 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 program; see the file COPYING. If not,
+# write to the Free Software Foundation, Inc., 59 Temple Place
+# - Suite 330, Boston, MA 02111-1307, USA.
+#
+# $Id$
+
+import qt
+import cStringIO
+
+try:
+  from PIL import Image as PILImage
+
+except:
+  PILImage = None
+
+from gnue.common.definitions import GParser
+from gnue.forms.uidrivers.qt3.widgets import _base
+
+# =============================================================================
+# Exceptions
+# =============================================================================
+
+class MissingSizeError(GParser.MarkupError):
+    """ Image has no size given """
+    def __init__(self, image):
+        msg = u_("Image '%(name)s' is missing one of Sizer:width or "
+                 "Sizer:height") % {'name': image.name}
+        GParser.MarkupError.__init__(self, msg, image._url, image._lineNumber)
+
+
+# =============================================================================
+# Wrap an UI layer around a wx image
+# =============================================================================
+
+class UIImage (_base.UIHelper):
+    """
+    Creates a single instance of an image.
+    """
+
+    # ------------------------------------------------------------------------
+    # Create an image widget
+    # ------------------------------------------------------------------------
+
+    def _create_widget_ (self, event, spacer):
+        """
+        Creates a new StaticBitmap widget.
+        """
+
+        parent = event.container
+
+        (min_w, min_h) = self.get_default_size()
+        self.widget = qt.QLabel(parent)
+        self.widget.setMinimumSize(min_w, min_h)
+
+        self.getParent().add_widgets(self, spacer)
+
+        return self.widget
+
+
+    # -------------------------------------------------------------------------
+    # Get the default size for the image
+    # -------------------------------------------------------------------------
+
+    def get_default_size(self):
+
+        if self.managed:
+            width = int(getattr(self._gfObject, 'Sizer__width', -1))
+            height = int(getattr(self._gfObject, 'Sizer__height', -1))
+            if width == -1 or height == -1:
+                raise MissingSizeError(self._gfObject)
+        else:
+            width = self._uiDriver.cell_width * self.chr_w
+            height = self._uiDriver.cell_height * self.chr_h
+
+        return (width, height)
+
+
+    # ------------------------------------------------------------------------
+    # Set the widget's PIL
+    # ------------------------------------------------------------------------
+
+    def _ui_set_value_(self, index, value):
+        """
+        Loads an image.
+        """
+
+        if PILImage is None:
+            return
+
+        widget = self.widgets [index]
+        scrx, scry = self.get_default_size()
+        imgx, imgy = value.size
+
+        scalex = scaley = 1
+
+        fit = self._gfObject.fit
+
+        if fit == "auto":
+            if float (scrx) / imgx < float (scry) / imgy:
+                fit = "width"
+            else:
+                fit = "height"
+
+        if fit == "width":
+            scalex = scaley = float (scrx) / imgx
+
+        elif fit == "height":
+            scalex = scaley = float (scry) / imgy
+
+        elif fit == "both":
+            scalex = float (scrx) / imgx
+            scaley = float (scry) / imgy
+        else:
+            # TODO: is there something like a ScrollWindow ?
+            pass
+
+        if scalex != 1 or scaley != 1:
+            value = value.resize ((abs(int(imgx * scalex)),
+                abs(int(imgy * scaley))), PILImage.BICUBIC)
+
+        # Convert the PIL Image to a QPixmap
+        # TODO: find a better way than using StringIO
+        f = cStringIO.StringIO()
+        value.save(f, 'PNG')
+        pxm = qt.QPixmap()
+        pxm.loadFromData(f.getvalue())
+        widget.setPixmap(pxm)
+
+# =============================================================================
+# Configuration data
+# =============================================================================
+
+configuration = {
+  'baseClass': UIImage,
+  'provides' : 'GFImage',
+  'container': 0,
+}


Property changes on: trunk/gnue-forms/src/uidrivers/qt3/widgets/image.py
___________________________________________________________________
Name: svn:keywords
   + Id