diff options
Diffstat (limited to 'grc/gui/DrawingArea.py')
| -rw-r--r-- | grc/gui/DrawingArea.py | 126 |
1 files changed, 93 insertions, 33 deletions
diff --git a/grc/gui/DrawingArea.py b/grc/gui/DrawingArea.py index 2bce21fa6d..d1e0e78634 100644 --- a/grc/gui/DrawingArea.py +++ b/grc/gui/DrawingArea.py @@ -17,15 +17,10 @@ along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA """ -import gi -gi.require_version('Gtk', '3.0') -from gi.repository import Gtk -from gi.repository import Gdk -from gi.repository import GObject +from gi.repository import Gtk, Gdk, GObject -from Constants import MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT, DND_TARGETS -import Colors +from . import Constants, Colors class DrawingArea(Gtk.DrawingArea): @@ -42,11 +37,16 @@ class DrawingArea(Gtk.DrawingArea): Args: main_window: the main_window containing all flow graphs """ + Gtk.DrawingArea.__init__(self) + + self._flow_graph = flow_graph + + self.zoom_factor = 1.0 self.ctrl_mask = False self.mod1_mask = False - self._flow_graph = flow_graph - GObject.GObject.__init__(self) - self.set_size_request(MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT) + self.button_state = [False] * 10 + + # self.set_size_request(MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT) self.connect('realize', self._handle_window_realize) self.connect('draw', self.draw) self.connect('motion-notify-event', self._handle_mouse_motion) @@ -54,24 +54,28 @@ class DrawingArea(Gtk.DrawingArea): self.connect('button-release-event', self._handle_mouse_button_release) self.connect('scroll-event', self._handle_mouse_scroll) self.add_events( - Gdk.EventMask.BUTTON_PRESS_MASK | \ - Gdk.EventMask.POINTER_MOTION_MASK | \ - Gdk.EventMask.BUTTON_RELEASE_MASK | \ - Gdk.EventMask.LEAVE_NOTIFY_MASK | \ - Gdk.EventMask.ENTER_NOTIFY_MASK #| \ + Gdk.EventMask.BUTTON_PRESS_MASK | + Gdk.EventMask.POINTER_MOTION_MASK | + Gdk.EventMask.BUTTON_RELEASE_MASK | + Gdk.EventMask.SCROLL_MASK | + Gdk.EventMask.LEAVE_NOTIFY_MASK | + Gdk.EventMask.ENTER_NOTIFY_MASK #Gdk.EventMask.FOCUS_CHANGE_MASK ) - #setup drag and drop + + # setup drag and drop self.drag_dest_set(Gtk.DestDefaults.ALL, [], Gdk.DragAction.COPY) self.connect('drag-data-received', self._handle_drag_data_received) self.drag_dest_set_target_list(None) self.drag_dest_add_text_targets() - #setup the focus flag + + # setup the focus flag self._focus_flag = False self.get_focus_flag = lambda: self._focus_flag def _handle_notify_event(widget, event, focus_flag): self._focus_flag = focus_flag self.connect('leave-notify-event', _handle_notify_event, False) self.connect('enter-notify-event', _handle_notify_event, True) + # todo: fix # self.set_flags(Gtk.CAN_FOCUS) # self.set_can_focus(True) # self.connect('focus-out-event', self._handle_focus_lost_event) @@ -86,10 +90,21 @@ class DrawingArea(Gtk.DrawingArea): def _handle_mouse_scroll(self, widget, event): if event.get_state() & Gdk.ModifierType.SHIFT_MASK: - if event.direction == Gdk.ScrollDirection.UP: - event.direction = Gdk.ScrollDirection.LEFT - else: - event.direction = Gdk.ScrollDirection.RIGHT + if event.direction == Gdk.ScrollDirection.UP: + event.direction = Gdk.ScrollDirection.LEFT + else: + event.direction = Gdk.ScrollDirection.RIGHT + + elif event.get_state() & Gdk.ModifierType.CONTROL_MASK: + change = 1.2 if event.direction == Gdk.ScrollDirection.UP else 1/1.2 + zoom_factor = min(max(self.zoom_factor * change, 0.1), 5.0) + + if zoom_factor != self.zoom_factor: + self.zoom_factor = zoom_factor + self.queue_draw() + return True + + return False def _handle_mouse_button_press(self, widget, event): """ @@ -98,14 +113,18 @@ class DrawingArea(Gtk.DrawingArea): self.grab_focus() self.ctrl_mask = event.get_state() & Gdk.ModifierType.CONTROL_MASK self.mod1_mask = event.get_state() & Gdk.ModifierType.MOD1_MASK - if event.button == 1: self._flow_graph.handle_mouse_selector_press( - double_click=(event.type == Gdk.EventType._2BUTTON_PRESS), - coordinate=(event.x, event.y), - ) - if event.button == 3: self._flow_graph.handle_mouse_context_press( - coordinate=(event.x, event.y), - event=event, - ) + self.button_state[event.button] = True + + if event.button == 1: + self._flow_graph.handle_mouse_selector_press( + double_click=(event.type == Gdk.EventType._2BUTTON_PRESS), + coordinate=self._translate_event_coords(event), + ) + elif event.button == 3: + self._flow_graph.handle_mouse_context_press( + coordinate=self._translate_event_coords(event), + event=event, + ) def _handle_mouse_button_release(self, widget, event): """ @@ -113,9 +132,11 @@ class DrawingArea(Gtk.DrawingArea): """ self.ctrl_mask = event.get_state() & Gdk.ModifierType.CONTROL_MASK self.mod1_mask = event.get_state() & Gdk.ModifierType.MOD1_MASK - if event.button == 1: self._flow_graph.handle_mouse_selector_release( - coordinate=(event.x, event.y), - ) + self.button_state[event.button] = False + if event.button == 1: + self._flow_graph.handle_mouse_selector_release( + coordinate=self._translate_event_coords(event), + ) def _handle_mouse_motion(self, widget, event): """ @@ -123,20 +144,59 @@ class DrawingArea(Gtk.DrawingArea): """ self.ctrl_mask = event.get_state() & Gdk.ModifierType.CONTROL_MASK self.mod1_mask = event.get_state() & Gdk.ModifierType.MOD1_MASK + + if self.button_state[1]: + self._auto_scroll(event) + self._flow_graph.handle_mouse_motion( - coordinate=(event.x, event.y), + coordinate=self._translate_event_coords(event), + button1_pressed=self.button_state[1] ) + def _auto_scroll(self, event): + x, y = event.x, event.y + scrollbox = self.get_parent().get_parent() + + w, h = self._flow_graph.get_max_coords(initial=(x, y)) + self.set_size_request(w + 100, h + 100) + + def scroll(pos, adj): + """scroll if we moved near the border""" + adj_val = adj.get_value() + adj_len = adj.get_page_size() + if pos - adj_val > adj_len - Constants.SCROLL_PROXIMITY_SENSITIVITY: + adj.set_value(adj_val + Constants.SCROLL_DISTANCE) + adj.emit('changed') + elif pos - adj_val < Constants.SCROLL_PROXIMITY_SENSITIVITY: + adj.set_value(adj_val - Constants.SCROLL_DISTANCE) + adj.emit('changed') + + scroll(x, scrollbox.get_hadjustment()) + scroll(y, scrollbox.get_vadjustment()) + def _handle_window_realize(self, widget): """ Called when the window is realized. Update the flowgraph, which calls new pixmap. """ self._flow_graph.update() + w, h = self._flow_graph.get_max_coords() + self.set_size_request(w + 100, h + 100) def draw(self, widget, cr): + width = widget.get_allocated_width() + height = widget.get_allocated_height() + cr.set_source_rgb(*Colors.FLOWGRAPH_BACKGROUND_COLOR) + cr.rectangle(0, 0, width, height) + + cr.scale(self.zoom_factor, self.zoom_factor) + cr.fill() + self._flow_graph.draw(widget, cr) + def _translate_event_coords(self, event): + return event.x / self.zoom_factor, event.y / self.zoom_factor + def _handle_focus_lost_event(self, widget, event): # don't clear selection while context menu is active if not self._flow_graph.get_context_menu().flags() & Gtk.VISIBLE: |