Add FloatingLayout from OKAPI

sloth/gui/floatinglayout.py

@@ -0,0 +1,64 @@
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+
+class FloatingLayout(QLayout):
+    def __init__(self, parent=None):
+        QLayout.__init__(self, parent)
+        self._items = []
+
+    def addItem(self, item):
+        self._items.append(item)
+
+    def count(self):
+        return len(self._items)
+
+    def itemAt(self, index):
+        if index < 0 or index >= len(self._items):
+            return None
+        return self._items[index]
+
+    def takeAt(self, index):
+        if index < 0 or index >= len(self._items):
+            return None
+        return self._items[index]
+
+    def sizeHint(self):
+        return self.minimumSize()
+
+    def setGeometry(self, r):
+        QLayout.setGeometry(self, r)
+        self.layoutChildren(r)
+
+    def minimumSize(self):
+        sz = QSize(0, 20)
+        for item in self._items:
+            sz.rwidth = max(sz.width(), item.minimumSize().width())
+        return sz
+
+    def hasHeightForWidth(self):
+        return True
+
+    def heightForWidth(self, width):
+        height = self.layoutChildren(QRect(0, 0, width, 100), False)
+        return height
+
+    def layoutChildren(self, r, appl=True):
+        line_width  = r.x()
+        line_height = 0
+        line_top    = r.y()
+        max_width   = r.x() + r.width()
+
+        for item in self._items:
+            sz_hint = item.sizeHint()
+            if line_width != r.x() and line_width + sz_hint.width() > max_width:
+                # start new line
+                line_top += line_height
+                line_width = r.x()
+                line_height = 0
+            if appl:
+                item.setGeometry(QRect(QPoint(line_width, line_top), sz_hint))
+
+            line_width += sz_hint.width()
+            line_height = max(line_height, sz_hint.height())
+
+        return line_top + line_height