Zoom in and out to selected nodes (#4061)

* zoom in and out to selected

* to shortcuts docs

* minor tweaks

docs/shortcuts.rst

@@ -32,6 +32,8 @@ This is a collection of shortcuts useful in the Sverchok node tree, some are Ble
 
 **Numpad .** - Frame selected
 
+**Alt + Z** - Toggle between 'Zoom Selected' and 'View All'
+
 **F** - Links (connects) the selected nodes from left to right using the first output socket with the first empty input socket.
 
 **V** - Vectors - Edges - Faces connector: the same of the F key but connecting vertices to vertices, edges to edges and faces (or polygons) to faces (or polygons) if possible.

ui/__init__.py

@@ -2,7 +2,7 @@
     "color_def", "sv_IO_panel", "sv_examples_menu", 'sv_3d_panel', 'nodeview_operators',
     "sv_panels", "nodeview_rclick_menu", "nodeview_space_menu","nodeview_solids_menu",
     "monad", "sv_icons", "presets", "nodes_replacement", "sv_panel_display_nodes",
-    "sv_temporal_viewers", "sv_vep_connector",
+    "sv_temporal_viewers", "sv_vep_connector", "zoom_to_node",
     # bgl modules
     "bgl_callback_3dview", "bgl_callback_nodeview",
     # show git info

ui/nodeview_keymaps.py

@@ -271,6 +271,9 @@ def add_keymap():
         kmi = km.keymap_items.new('node.sv_node_connector', 'V', 'PRESS')
         nodeview_keymaps.append((km, kmi))
 
+        kmi = km.keymap_items.new('node.zoom_to_node', 'Z', 'PRESS', alt=True)
+        nodeview_keymaps.append((km, kmi))
+
         # 3D View
         km = kc.keymaps.new(name='3D View', space_type='VIEW_3D')
         kmi = km.keymap_items.new('wm.sv_obj_modal_update', 'F5', 'PRESS', ctrl=True, shift=True)

ui/zoom_to_node.py

@@ -0,0 +1,61 @@
+# -*- coding: utf-8 -*-
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+import bpy
+
+class ZoomToNodeOperator(bpy.types.Operator):
+    """Zoom In and Out from node"""
+    bl_idname = "node.zoom_to_node"
+    bl_label = "Zoom To Node Operator"
+
+    @classmethod
+    def poll(cls, context):
+        space = context.space_data
+        return space.type == 'NODE_EDITOR'
+
+    def execute(self, context):
+        if context.scene.zoomed_in:
+            bpy.ops.node.view_all()
+            for i in range(5):
+                bpy.ops.view2d.zoom_in()
+            context.scene.zoomed_in = False
+        else:
+            context.scene.zoomed_in = True
+            bpy.ops.view2d.zoom_border()
+            bpy.ops.node.view_selected()
+            node_selected = context.selected_nodes
+            if len(node_selected) > 1:
+                for i in range(3):
+                    bpy.ops.view2d.zoom_in()
+
+
+        return {'FINISHED'}
+
+
+def register():
+    bpy.utils.register_class(ZoomToNodeOperator)
+    bpy.types.Scene.zoomed_in = bpy.props.BoolProperty(
+        name='Zoom In and out from node',
+        default=False,
+        description='Zoom to selected/ Zoom to all')
+
+
+def unregister():
+    bpy.utils.unregister_class(ZoomToNodeOperator)
+    del bpy.types.Scene.zoomed_in