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| author |   vnydv21 <2021eeb1335@iitrpr.ac.in> | 2024-03-10 17:16:49 +0530 |
|---|---|---|
| committer |   Jeff Long <willcode4@gmail.com> | 2024-03-26 16:03:23 -0400 |
| commit | 29df719bad84ee7d2f2c8813acc84cceb9fdd851 (patch) | |
| tree | 6e39a4b82b822313c843feb4f166269df89e81ed | |
| parent | grc_qt: add middle mouse button panning (diff) | |
| download | gnuradio-29df719bad84ee7d2f2c8813acc84cceb9fdd851.tar.xz gnuradio-29df719bad84ee7d2f2c8813acc84cceb9fdd851.zip | |
grc: add middle mouse button panning
Signed-off-by: vnydv21 <2021eeb1335@iitrpr.ac.in>
(cherry picked from commit 42d0e9b1ba1dd39bd664a13e2ffe2f5098c8c9e7)
Signed-off-by: Jeff Long <willcode4@gmail.com>
| -rw-r--r-- | grc/gui/DrawingArea.py | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/grc/gui/DrawingArea.py b/grc/gui/DrawingArea.py index bc2bfdf0b..fae1ab4b5 100644 --- a/grc/gui/DrawingArea.py +++ b/grc/gui/DrawingArea.py @@ -39,6 +39,9 @@ class DrawingArea(Gtk.DrawingArea): self.mod1_mask = False self.button_state = [False] * 10 + # middle mouse panning + self._old_mouse_coodinates = (0, 0) + # self.set_size_request(MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT) self.connect('realize', self._handle_window_realize) self.connect('draw', self.draw) @@ -109,6 +112,27 @@ class DrawingArea(Gtk.DrawingArea): self._update_after_zoom = True self.queue_draw() + def _middle_mouse_pan(self, event): + """ + Pan the canvas with the middle mouse button. + """ + x, y = event.x, event.y + old_x, old_y = self._old_mouse_coodinates + + scrollbox = self.get_parent().get_parent() + + def scroll(dpos, adj): + adj_val = adj.get_value() + if abs(dpos) >= Constants.SCROLL_DISTANCE: + adj.set_value(adj_val - dpos) + adj.emit('changed') + + dx = x - old_x + dy = y - old_y + + scroll(dx, scrollbox.get_hadjustment()) + scroll(dy, scrollbox.get_vadjustment()) + def _handle_mouse_scroll(self, widget, event): if event.get_state() & Gdk.ModifierType.CONTROL_MASK: if event.direction == Gdk.ScrollDirection.UP: @@ -140,6 +164,9 @@ class DrawingArea(Gtk.DrawingArea): coordinate=self._translate_event_coords(event), event=event, ) + elif event.button == 2: + # middle mouse panning + self._old_mouse_coodinates = (event.x, event.y) def _handle_mouse_button_release(self, widget, event): """ @@ -162,6 +189,8 @@ class DrawingArea(Gtk.DrawingArea): if self.button_state[1]: self._auto_scroll(event) + elif self.button_state[2]: + self._middle_mouse_pan(event) self._flow_graph.handle_mouse_motion( coordinate=self._translate_event_coords(event), |