From 5045d33da1e33deb71bcb907177188a6beec99d2 Mon Sep 17 00:00:00 2001 From: Ali Lown Date: Mon, 26 Nov 2012 10:42:20 +0000 Subject: [PATCH 2/2] Implement auto-center/zoom for preview window --- gui/previewwindow.py | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) diff --git a/gui/previewwindow.py b/gui/previewwindow.py index 4732bcd..f6e359a 100644 --- a/gui/previewwindow.py +++ b/gui/previewwindow.py @@ -23,9 +23,29 @@ class ToolWidget(gtk.VBox): gtk.VBox.__init__(self) self.set_size_request(250, 250) - self.tdw = tileddrawwidget.TiledDrawWidget(app, app.doc.model) + self.doc = app.doc.model + self.tdw = tileddrawwidget.TiledDrawWidget(app, self.doc) + self.tdw.zoom_min = 1/50.0 self.tdw.set_size_request(250, 250) - #TODO: perhaps configure this based on used area? - self.tdw.scale = 0.03 self.tdw.set_sensitive(False) self.add(self.tdw) + self.doc.canvas_observers.append(self.doc_modified_cb) + + def doc_modified_cb(self, x, y, w, h): + winx, winy = self.size_request() + + #Calculate new zoom level + rect = self.doc.get_bbox() + fw = rect.w + fh = rect.h + + if fw == 0 or fh == 0: + return + + zoom_x = float(winx) / fw + zoom_y = float(winy) / fh + + scale = min(zoom_x, zoom_y) + + self.tdw.scale = scale + self.tdw.recenter_document() -- 1.8.0