1 files changed, 72 insertions, 0 deletions
diff --git a/asciifarm/client/display/field.py b/asciifarm/client/display/field.py
new file mode 100644
index 0000000..c38a82b
--- /dev/null
+++ b/asciifarm/client/display/field.py
@@ -0,0 +1,72 @@
+
+import curses
+
+
+class Field:
+    
+    
+    def __init__(self, size=(1,1), charSize=1, colours=False):
+        self.pad = curses.newpad(size[1]+1, (size[0]+1)*charSize)
+        self.size = size
+        self.charSize = charSize
+        self.center = (0, 0)
+        self.colours = colours
+        self.changed = False
+        self.widget = None
+    
+    def setWidget(self, widget):
+        self.widget = widget
+    
+    def resize(self, width, height):
+        self.size = (width, height)
+        self.pad.resize(height+1, width*self.charSize)
+        self.widget.change()
+        win = self.widget.getWin()
+        if win:
+            win.erase()
+            win.noutrefresh()
+    
+    def changeCell(self, x, y, sprites):
+        """ sprites must always have at least one element """
+        char, colour, bgcolour = sprites[0]
+        if bgcolour is None:
+            for (ch, co, bg) in sprites:
+                if bg is not None:
+                    bgcolour = bg
+                    break
+            else:
+                bgcolour = 0
+        if colour is not None and self.colours:
+            self.pad.addstr(y, x*self.charSize, char, self.colours.get(colour, bgcolour))
+        else:
+            self.pad.addstr(y, x*self.charSize, char)
+        self.widget.change()
+    
+    def setCenter(self, pos):
+        self.center = pos
+        self.widget.change()
+    
+    def getWidth(self):
+        return self.size[0]*self.charSize
+    
+    def getHeight(self):
+        return self.size[1]
+    
+    def _roundWidth(self, x):
+        return x // self.charSize * self.charSize
+    
+    def update(self):
+        win = self.widget.getWin()
+        width, height = win.getSize()
+        x, y = win.getPos()
+        xmax = x + width
+        ymax = y + height
+        self.pad.noutrefresh(
+            max(0, min(self.getHeight()-height, self.center[1] - int(height/2))),
+            max(0, min(
+                self._roundWidth(self.getWidth()-width),
+                self._roundWidth(self.center[0]*self.charSize - int(width/2)))),
+            y,
+            x + max(0, (width - self.getWidth()) // 2),
+            ymax,
+            xmax)