From 2a51cc7abfae4867c08935f42bf6c2679dc3e23b Mon Sep 17 00:00:00 2001
From: Glenn Richardson <glenn.richardson@live.com>
Date: Wed, 18 May 2016 16:21:01 +0200
Subject: grc: block alignment tools
---
grc/gui/FlowGraph.py | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
(limited to 'grc/gui/FlowGraph.py')
diff --git a/grc/gui/FlowGraph.py b/grc/gui/FlowGraph.py
index 357f87c894..9c6bd8f169 100644
--- a/grc/gui/FlowGraph.py
+++ b/grc/gui/FlowGraph.py
@@ -312,6 +312,47 @@ class FlowGraph(Element, _Flowgraph):
selected_block.move(delta_coordinate)
self.element_moved = True
+ def align_selected(self, calling_action=None):
+ """
+ Align the selected blocks.
+
+ Args:
+ calling_action: the action initiating the alignment
+
+ Returns:
+ True if changed, otherwise False
+ """
+ blocks = self.get_selected_blocks()
+ if calling_action is None or not blocks:
+ return False
+
+ # compute common boundary of selected objects
+ min_x, min_y = max_x, max_y = blocks[0].get_coordinate()
+ for selected_block in blocks:
+ x, y = selected_block.get_coordinate()
+ min_x, min_y = min(min_x, x), min(min_y, y)
+ x += selected_block.W
+ y += selected_block.H
+ max_x, max_y = max(max_x, x), max(max_y, y)
+ ctr_x, ctr_y = (max_x + min_x)/2, (max_y + min_y)/2
+
+ # align the blocks as requested
+ transform = {
+ Actions.BLOCK_VALIGN_TOP: lambda x, y, w, h: (x, min_y),
+ Actions.BLOCK_VALIGN_MIDDLE: lambda x, y, w, h: (x, ctr_y - h/2),
+ Actions.BLOCK_VALIGN_BOTTOM: lambda x, y, w, h: (x, max_y - h),
+ Actions.BLOCK_HALIGN_LEFT: lambda x, y, w, h: (min_x, y),
+ Actions.BLOCK_HALIGN_CENTER: lambda x, y, w, h: (ctr_x-w/2, y),
+ Actions.BLOCK_HALIGN_RIGHT: lambda x, y, w, h: (max_x - w, y),
+ }.get(calling_action, lambda *args: args)
+
+ for selected_block in blocks:
+ x, y = selected_block.get_coordinate()
+ w, h = selected_block.W, selected_block.H
+ selected_block.set_coordinate(transform(x, y, w, h))
+
+ return True
+
def rotate_selected(self, rotation):
"""
Rotate the selected blocks by multiples of 90 degrees.
--
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