yentl
/
modelverse_GUI


			
				
					
						
						
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							<class name="CanvasElement">
    <relationships>
        <association name="parent" class="A" min="1" max="1" />
        <inheritance class="SCCDWidget" priority='0'/>
        <association name="prompt" class="PromptWindow"/>
    </relationships>
    <constructor>
        <parameter name="parent"/>
        <parameter name="coordinates"/>
        <parameter name="cs_element"/>
        <parameter name="as_element"/>
        <super class="SCCDWidget">
            <parameter expr="True"/>
        </super>
        <body>
            self.containing_canvas = parent
            self.coordinates = coordinates
            self.elements = {}
            self.tmp = {}
            self.cs_element = cs_element
            self.as_element = as_element
            self.diff_results = {}
        </body>
    </constructor>
    <destructor>
        <body>
            for f in self.elements:
                self.containing_canvas.delete(f)
        </body>
    </destructor>

    <method name="add_to_layer">
        <parameter name="layer"/>
        <parameter name="ID"/>
        <body>
            # Code adapted from: https://stackoverflow.com/questions/9576063/stacking-order-maintenance-in-tkinter
            layer_tag = "layer %s" % layer
            if layer_tag not in self.containing_canvas.layers: self.containing_canvas.layers.append(layer_tag)
            self.containing_canvas.itemconfigure(ID, tags=[layer_tag])

            for layer in sorted(self.containing_canvas.layers):
                self.containing_canvas.lift(layer)
        </body>
    </method>

    <method name="move_group">
        <parameter name="new_location"/>
        <body>
            for f in self.elements:
                old_coords = self.containing_canvas.coords(f)

                new_x = new_location[0] + self.elements[f]['x']
                new_y = new_location[1] + self.elements[f]['y']

                if len(old_coords) == 2:
                    self.containing_canvas.coords(f, (new_x, new_y))
                elif len(old_coords) == 4:
                    height = old_coords[3] - old_coords[1]
                    width = old_coords[2] - old_coords[0]
                    self.containing_canvas.coords(f, (new_x, new_y, new_x + width, new_y + height))
        </body>
    </method>

    <scxml initial="init">
        <state id="init" initial="init">
            <onexit>
                <raise event="canvas_element_ready" target="'parent'"/>
            </onexit>

            <state id="init">
                <transition cond="self.as_element not in self.containing_canvas.to_move" target="../../main">
                    <script>
                        print("Not found: %s in %s" % (self.as_element, self.containing_canvas.to_move))
                    </script>
                </transition>

                <transition cond="self.as_element in self.containing_canvas.to_move" target="../update_mv">
                    <script>
                        self.coordinates = self.containing_canvas.to_move.pop(self.as_element)
                        self.move_group(self.coordinates)
                    </script>
                </transition>
            </state>

            <state id="update_mv" initial="check">
                <state id="check">
                    <transition cond="current_rendered_model" target="../x"/>
                    <transition cond="not current_rendered_model" target="../../../main">
                        <raise event="move" scope="narrow" target="'parent/parent'">
                            <parameter expr="self.as_element"/>
                            <parameter expr="self.coordinates"/>
                        </raise>
                    </transition>
                </state>

                <state id="x">
                    <onentry>
                        <raise event="mv_request" scope="broad">
                            <parameter expr="'attr_assign'"/>
                            <parameter expr="[current_rendered_model, self.cs_element, 'x', self.coordinates[0]]"/>
                        </raise>
                    </onentry>

                    <transition event="mv_response" target="../y"/>
                </state>

                <state id="y">
                    <onentry>
                        <raise event="mv_request" scope="broad">
                            <parameter expr="'attr_assign'"/>
                            <parameter expr="[current_rendered_model, self.cs_element, 'y', self.coordinates[1]]"/>
                        </raise>
                    </onentry>

                    <transition event="mv_response" target="../../../main"/>
                </state>
            </state>
        </state>

        <state id="main">
            <transition event="draw_element" target=".">
                <parameter name="element"/>
                <script>
                    elem_x = self.coordinates[0] + element["x"]
                    elem_y = self.coordinates[1] + element["y"]
                    if element["type"] == "Rectangle":
                        result = self.containing_canvas.create_rectangle(elem_x, elem_y, elem_x + element["width"], elem_y + element["height"], fill=element["fillColour"], outline=element["lineColour"])
                    elif element["type"] == "Text":
                        result = self.containing_canvas.create_text(elem_x, elem_y, fill=element["lineColour"], text=element["text"], anchor=tk.NW)
                    elif element["type"] == "Line":
                        result = self.containing_canvas.create_line(elem_x, elem_y, self.coordinates[0] + element["targetX"], self.coordinates[1] + element["targetY"], fill=element["lineColour"], width=element["lineWidth"], arrow=tk.LAST if element["arrow"] else tk.NONE)
                    else:
                        raise Exception("Undefined render format: " + str(element))
                        result = None

                    if result is not None:
                        self.elements[result] = element
                        self.set_bindable_and_tagorid(self.containing_canvas, result)
                        self.add_to_layer(element["layer"], result)
                </script>
            </transition>

            <transition event="left-click" cond="id(self) == ID and not control_pressed" target="../dragging">
                <parameter name="ID"/>
                <script>
                    self.original_coords = self.last_x, self.last_y
                </script>
            </transition>

            <transition event="middle-click" cond="id(self) == ID and not control_pressed" target="../update_attrs">
                <parameter name="ID"/>
            </transition>

            <transition event="middle-click" cond="id(self) == ID and control_pressed" target=".">
                <parameter name="ID"/>
                <raise event="modify_defined_attrs" scope="narrow" target="'parent/parent'">
                    <parameter expr="self.as_element"/>
                    <parameter expr="self.cs_element"/>
                </raise>
            </transition>

            <transition event="right-click" cond="id(self) == ID and not control_pressed" target=".">
                <parameter name="ID"/>
                <raise event="create_line" scope="narrow" target="'parent'">
                    <parameter expr="self.cs_element"/>
                    <parameter expr="self.as_element"/>
                    <parameter expr="(self.last_x, self.last_y)"/>
                </raise>
            </transition>

            <transition event="right-click" cond="id(self) == ID and control_pressed" target="../remove_element">
                <parameter name="ID"/>
            </transition>
        </state>

        <state id="remove_element">
            <onentry>
                <raise event="mv_request" scope="broad">
                    <parameter expr="'delete_element'"/>
                    <parameter expr="[current_model, self.as_element]"/>
                </raise>
                <raise event="deleted_group" scope="narrow" target="'parent'">
                    <parameter expr="self.cs_element"/>
                </raise>
                <script>
                    for f in self.elements:
                        self.containing_canvas.delete(f)
                    self.elements = {}
                </script>
            </onentry>

            <transition event="mv_response" target="../main">
            </transition>
        </state>

        <state id="dragging">
            <transition event="motion" cond="id(self) == ID" target=".">
                <parameter name="ID"/>
                <script>
                    new_x = self.coordinates[0] + (self.last_x - self.original_coords[0])
                    new_y = self.coordinates[1] + (self.last_y - self.original_coords[1])
                    self.move_group((new_x, new_y))
                </script>
                <raise event="moved_group" scope="narrow" target="'parent'">
                    <parameter expr="self.cs_element"/>
                    <parameter expr="(new_x, new_y)"/>
                </raise>
            </transition>

            <transition event="left-release" cond="id(self) == ID" target="../update_mv">
                <parameter name="ID"/>
                <script>
                    delta_x = self.original_coords[0] - self.last_x
                    delta_y = self.original_coords[1] - self.last_y
                    self.coordinates = self.coordinates[0] - delta_x, self.coordinates[1] - delta_y
                </script>
            </transition>
        </state>

        <state id="update_attrs" initial="query">
            <state id="query">
                <onentry>
                    <raise event="mv_request" scope="broad">
                        <parameter expr="'read_attrs'"/>
                        <parameter expr="[current_model, self.as_element]"/>
                    </raise>
                </onentry>

                <transition event="mv_response" target="../prompt">
                    <parameter name="result"/>
                    <script>
                        self.prev_results = {k: json.dumps(v) for k, v in result.items()}
                    </script>
                </transition>
            </state>

            <state id="prompt">
                <onentry>
                    <raise event="create_instance" scope="cd">
                        <parameter expr="'prompt'"/>
                        <parameter expr="'PromptWindow'"/>
                        <parameter expr="self.prev_results"/>
                        <parameter expr="{}"/>
                    </raise>
                </onentry>

                <transition event="instance_created" target="../wait_for_results">
                    <parameter name="name"/>
                    <raise event="start_instance" scope="cd">
                        <parameter expr="name"/>
                    </raise>
                    <script>
                        self.remaining_responses = 0
                    </script>
                </transition>
            </state>

            <state id="wait_for_results">
                <transition event="prompt_results" target=".">
                    <parameter name="results"/>
                    <script>
                        for k in results:
                            if results[k] != self.prev_results[k]:
                                self.diff_results[k] = results[k]
                        self.remaining_responses = len(self.diff_results)
                    </script>
                </transition>

                <transition event="close_window" cond="self.remaining_responses > 0" target="../process_results">
                    <raise event="delete_instance" scope="cd">
                        <parameter expr="'prompt'"/>
                    </raise>
                </transition>

                <transition event="close_window" cond="self.remaining_responses == 0" target="../../main">
                    <raise event="delete_instance" scope="cd">
                        <parameter expr="'prompt'"/>
                    </raise>
                </transition>
            </state>

            <state id="process_results">
                <transition cond="len(self.diff_results) > 0" target=".">
                    <script>
                        k, v = self.diff_results.popitem()
                    </script>
                    <raise event="mv_request" scope="broad">
                        <parameter expr="'attr_assign'"/>
                        <parameter expr="[current_model, self.as_element, k, json.loads(v)]"/>
                    </raise>
                </transition>
                <transition cond="self.remaining_responses == 0" target="../mark_dirty"/>
                <transition event="mv_response" target=".">
                    <script>
                        self.remaining_responses -= 1
                    </script>
                </transition>
            </state>

            <state id="mark_dirty" initial="check">
                <state id="check">
                    <transition cond="current_rendered_model" target="../do"/>
                    <transition cond="not current_rendered_model" target="../../../main">
                        <raise event="minimal_rerender_model" scope="narrow" target="'parent/parent'"/>
                    </transition>
                </state>

                <state id="do">
                    <onentry>
                        <raise event="mv_request" scope="broad">
                            <parameter expr="'attr_assign'"/>
                            <parameter expr="[current_rendered_model, self.cs_element, 'dirty', True]"/>
                        </raise>
                    </onentry>
                    <transition event="mv_response" target="../../../main">
                        <raise event="minimal_rerender_model" scope="narrow" target="'parent/parent'"/>
                    </transition>
                </state>
            </state>
        </state>

        <state id="update_mv" initial="check">
            <state id="check">
                <transition cond="current_rendered_model" target="../x"/>
                <transition cond="not current_rendered_model" target="../../main">
                    <raise event="move" scope="narrow" target="'parent/parent'">
                        <parameter expr="self.as_element"/>
                        <parameter expr="self.coordinates"/>
                    </raise>
                </transition>
            </state>

            <state id="x">
                <onentry>
                    <script>
                        print("Moving element %s in model %s" % (self.cs_element, current_rendered_model))
                    </script>
                    <raise event="mv_request" scope="broad">
                        <parameter expr="'attr_assign'"/>
                        <parameter expr="[current_rendered_model, self.cs_element, 'x', self.coordinates[0]]"/>
                    </raise>
                </onentry>

                <transition event="mv_response" target="../y"/>
            </state>

            <state id="y">
                <onentry>
                    <raise event="mv_request" scope="broad">
                        <parameter expr="'attr_assign'"/>
                        <parameter expr="[current_rendered_model, self.cs_element, 'y', self.coordinates[1]]"/>
                    </raise>
                </onentry>

                <transition event="mv_response" target="../../main"/>
            </state>
        </state>
    </scxml>
</class>