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| author | Glenn Richardson <glenn.richardson@live.com> | 2016-05-18 16:21:01 +0200 |
|---|---|---|
| committer | Sebastian Koslowski <koslowski@kit.edu> | 2016-05-18 16:25:17 +0200 |
| commit | 2a51cc7abfae4867c08935f42bf6c2679dc3e23b (patch) | |
| tree | 73fba236f9ae329c3855071d490814744e1064e9 /grc/gui/FlowGraph.py | |
| parent | 3d3c796b27a67ad33b46453a9618490d4c206e0e (diff) | |
grc: block alignment tools
Diffstat (limited to 'grc/gui/FlowGraph.py')
| -rw-r--r-- | grc/gui/FlowGraph.py | 41 |
1 files changed, 41 insertions, 0 deletions
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. |