SO CLOSE

clusterview/mode_handlers.py

@@ -112,61 +112,101 @@ def __handle_edit_point(ctx, event):
 
 
 def __handle_move_points(ctx, event):
+    """
+    A relatively complicated state machine that handles the process of
+    selection, clicking, and dragging.
+
+    @param ctx The context to the window.
+    @param event The event.
+    """
+
     global __left_click_flag
     global __mouse_start
     global __point_set
 
     set_drawing_event(event)
 
-    if event.button() == Qt.LeftButton:
-
-        # This if statement block is used to set the bounding box for
-        # drawing and call the selection procedure.
-        if (__left_click_flag is __ClickFlag.SELECTION_BOX and
-            event.type() == QEvent.MouseButtonPress):
+    print(event.type())
 
-            if __left_click_flag is __ClickFlag.NONE:
-                __left_click_flag = __ClickFlag.SELECTION_BOX
-
-            elif __left_click_flag is __ClickFlag.SELECTION_BOX:
-                # We are now in the click-and-hold to signal move
-                # tracking and translation
-                __left_click_flag = __ClickFlag.SELECTION_MOVE
-            else:
-                __left_click_flag = ClickFlag.NONE
-
-            if __left_click_flag is __ClickFlag.SELECTION_BOX:
-                set_move_bb_top_left(event.x(), event.y())
-
-            elif __left_click_flag is __ClickFlag.SELECTION_MOVE:
-                __mouse_start = (event.x(), event.y())
-
-        elif (__left_click_flag is __ClickFlag.SELECTION_BOX
-              and event.type() == QEvent.MouseMove):
+    # This if statement block is used to set the bounding box for
+    # drawing and call the selection procedure.
+    if (event.button() == Qt.LeftButton and
+        event.type() == QEvent.MouseButtonPress):
 
+        if __left_click_flag is __ClickFlag.NONE:
+            __left_click_flag = __ClickFlag.SELECTION_BOX
+            set_move_bb_top_left(event.x(), event.y())
+
+        elif __left_click_flag is __ClickFlag.SELECTION_BOX:
+            # We are now in the click-and-hold to signal move
+            # tracking and translation
+            __left_click_flag = __ClickFlag.SELECTION_MOVE
+            __mouse_start = (event.x(), event.y())
+        else:
+            __left_click_flag = __ClickFlag.NONE
+
+    elif (__left_click_flag is __ClickFlag.SELECTION_BOX
+          and event.type() == QEvent.MouseMove):
+
+        set_move_bb_bottom_right(event.x(), event.y())
+
+    elif (__left_click_flag is __ClickFlag.SELECTION_MOVE
+          and __mouse_start is not None
+          and event.type() == QEvent.MouseMove):
+
+        dx = __mouse_start[0] - event.x()
+        dy = __mouse_start[1] - event.y()
+
+        for p in __point_set.points:
+            if p.selected:
+                # Use the deltas to decide what direction to move.
+                # We only want to move in small unit increments.
+                # If we used the deltas directly the points would
+                # fly off screen quickly as we got farther from our
+                # start.
+
+                # TODO: THIS IS NUTS RIGHT NOW
+                #       WE SHOULD NOT ALLOW ANY POINT TO EXCEED
+                #       THE MAXIMUM SIZE OF THE SCREEN.
+
+                if dx > 0 and dy > 0:
+                    p.move(10, 10)
+                elif dx > 0 and dy == 0:
+                    p.move(10, 0)
+                elif dx < 0 and dy == 0:
+                    p.move(-10, 0)
+                elif dx == 0 and dy > 0:
+                    p.move(0, 10)
+                elif dx == 0 and dy < 0:
+                    p.move(0, -10)
+
+
+    elif (__left_click_flag is not __ClickFlag.NONE and
+          event.type() == QEvent.MouseButtonRelease):
+
+        # Final bottom right corner point
+        if __left_click_flag is __ClickFlag.SELECTION_BOX:
             set_move_bb_bottom_right(event.x(), event.y())
 
-        elif (__left_click_flag is __ClickFlag.SELECTION_MOVE
-              and event.type() == QEvent.MouseMove):
-
-            for p in __point_set:
-                if p.selected:
-                    p.move_point(__mouse_start[0] - event.x(),
-                                 __mouse_start[1] - event.y())
+            # Satisfy the post condition by resetting the bounding box
+            reset_move_bbs()
 
+    elif (__left_click_flag is not __ClickFlag.NONE
+          and event.type() == QEvent.KeyPress
+          and event.key() == Qt.Key_Escape):
 
-        elif (__left_click_flag is not __ClickFlag.NONE and
-              event.type() == QEvent.MouseButtonRelease):
+        # TODO: THIS KEY PRESS IS BROKEN AND THE CLICK TO CANCEL BEHAVIOR
+        #       NEED TO BE REMOVED. YOU NEED TO OVERWRITE THE KEY PRESS
+        #       EVENT ON THE OPENGL WIDGET. IF MODE IS MOVE AND ESCAPE IS
+        #       PRESSED CANCEL ALL SELECTIONS!!
 
-            # Final bottom right corner point
-            set_move_bb_bottom_right(event.x(), event.y())
+        if __left_click_flag is __ClickFlag.SELECTION_MOVE:
+            __mouse_start = None
 
-            # Satisfy the post condition by resetting the bounding box
-            reset_move_bbs()
-
-            if __left_click_flag is __ClickFlag.SELECTION_MOVE:
-                __mouse_start = None
+        __left_click_flag = __ClickFlag.NONE
+        __point_set.clear_selection()
 
+    ctx.point_list_widget.update()
     ctx.opengl_widget.update()
 
 def __handle_delete_point(ctx, event):