yentl
/
modelverse_GUI


			
				
					
						
						
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							<class name="Canvas">
    <relationships>
        <association name="parent" class="A" min="1" max="1" />
        <inheritance class="SCCDWidget" priority='0'/>
        <inheritance class="tk.Canvas" priority='1'/>
        <association name="elements" class="CanvasElement"/>
        <association name="connecting_lines" class="ConnectingLines"/>
    </relationships>
    <constructor>
        <parameter name="parent" />
        <super class="SCCDWidget"/>
        <super class="tk.Canvas">
            <parameter expr="parent" />
            <parameter expr="**{'scrollregion': (0, 0, parent.winfo_screenwidth()*2, parent.winfo_screenheight() * 2)}"/>
        </super>
        <body>
            vbar = tk.Scrollbar(self, orient=tk.VERTICAL)
            vbar.config(command=self.yview)
            vbar.pack(side=tk.RIGHT, fill=tk.Y, pady=(0, 16))

            hbar = tk.Scrollbar(self, orient=tk.HORIZONTAL)
            hbar.config(command=self.xview)
            hbar.pack(side=tk.BOTTOM, fill=tk.X)

            self.config(background='white', yscrollcommand=vbar.set, xscrollcommand=hbar.set)
            self.focus_set()

            self.assoc_links = {}
            self.element_group = {}
            self.group_location = {}
            self.connecting_lines = {}
            self.lines = set()
            self.layers = []
            print("RESET CANVAS")
            self.to_move = {}

            self.elems = []

            self.currently_selected = None
            self.loading = [tk.PhotoImage(file="icons/loading.gif", format="gif -index %i" % i) for i in range(8)]
        </body>
    </constructor>
    <destructor>
        <body>
            print("CANVAS DESTROYED")
            self.destroy()
        </body>
    </destructor>

    <scxml initial="main">
        <state id="main">
            <transition target="../ready">
                <raise event="tk_widget" scope="narrow" target="'parent'">
                    <parameter expr="self"/>
                </raise>
            </transition>
        </state>

        <parallel id="ready">
            <state id="process_events" initial="ready">
                <state id="ready">
                    <transition event="clear_canvas" target=".">
                        <raise event="delete_instance" scope="cd">
                            <parameter expr="'elements'"/>
                        </raise>
                        <raise event="delete_instance" scope="cd">
                            <parameter expr="'connecting_lines'"/>
                        </raise>
                        <script>
                            self.group_location = {}
                            self.layers = []
                        </script>
                    </transition>

                    <transition event="select_for_creation" target=".">
                        <parameter name="element_name"/>
                        <script>
                            self.currently_selected = element_name
                        </script>
                    </transition>

                    <transition event="right-click" cond="self.currently_selected is not None" target="../creating_element">
                        <script>
                            self.create_location = (self.last_x, self.last_y)
                        </script>
                    </transition>

                    <transition event="define_group" target="../creating_group">
                        <parameter name="element"/>
                        <script>
                            self.creating_id = element["id"]
                            self.group_location[element['id']] = (element['x'], element['y'])
                        </script>
                        <raise event="create_instance" scope="cd">
                            <parameter expr="'elements'"/>
                            <parameter expr="'CanvasElement'"/>
                            <parameter expr="self"/>
                            <parameter expr="(element['x'], element['y'])"/>
                            <parameter expr="element['id']"/>
                            <parameter expr="element['__asid']"/>
                        </raise>
                    </transition>

                    <transition event="define_contains" target=".">
                        <parameter name="element"/>
                        <script>
                            self.element_group[element["__target"]] = element["__source"]
                        </script>
                    </transition>

                    <transition event="draw_canvas" cond="element['type'] != 'ConnectingLine'" target=".">
                        <parameter name="element"/>
                        <raise event="draw_element" scope="narrow" target="self.assoc_links[self.element_group[element['id']]]">
                            <parameter expr="element"/>
                        </raise>
                    </transition>

                    <transition event="draw_canvas" cond="element['type'] == 'ConnectingLine'" target=".">
                        <parameter name="element"/>
                        <raise event="create_instance" scope="cd">
                            <parameter expr="'connecting_lines'"/>
                            <parameter expr="'ConnectingLine'"/>
                            <parameter expr="self"/>
                            <parameter expr="element"/>
                        </raise>
                    </transition>

                    <transition event="instance_created" target=".">
                        <parameter name="result"/>
                        <raise event="start_instance" scope="cd">
                            <parameter expr="result"/>
                        </raise>
                    </transition>

                    <transition event="moved_group" target=".">
                        <parameter name="group_element"/>
                        <parameter name="new_location"/>
                        <script>
                            self.group_location[group_element] = new_location
                        </script>
                        <raise event="moved_element" scope="narrow" target="'connecting_lines'">
                            <parameter expr="group_element"/>
                            <parameter expr="new_location"/>
                        </raise>
                    </transition>
                </state>

                <state id="creating_group">
                    <transition event="instance_created" target="../wait_canvas_element_ready">
                        <parameter name="assoc_name"/>
                        <raise event="start_instance" scope="cd">
                            <parameter expr="assoc_name"/>
                        </raise>
                        <script>
                            self.assoc_links[self.creating_id] = assoc_name
                        </script>
                    </transition>
                </state>

                <state id="wait_canvas_element_ready">
                    <transition event="moved_group" target=".">
                        <parameter name="group_element"/>
                        <parameter name="new_location"/>
                        <script>
                            self.group_location[group_element] = new_location
                        </script>
                        <raise event="moved_element" scope="narrow" target="'connecting_lines'">
                            <parameter expr="group_element"/>
                            <parameter expr="new_location"/>
                        </raise>
                    </transition>

                    <transition event="canvas_element_ready" target="../ready">
                        <raise event="group_ready" scope="narrow" target="'parent'"/>
                    </transition>
                </state>

                <state id="creating_element">
                    <onentry>
                        <raise event="mv_request" scope="broad">
                            <parameter expr="'instantiate'"/>
                            <parameter expr="[current_model, self.currently_selected, None, '']"/>
                        </raise>

                        <script>
                            self.elems.append([0, self.create_image(self.last_x, self.last_y, image=self.loading[0])])
                        </script>
                    </onentry>

                    <transition event="mv_response" target="../waiting_for_clear">
                        <parameter name="ID"/>
                        <script>
                            self.to_move[ID] = self.create_location
                        </script>
                        <raise event="rerender_model" scope="narrow" target="'parent'"/>
                    </transition>
                </state>

                <state id="waiting_for_clear">
                    <transition event="clear_canvas" target="../ready">
                        <raise event="delete_instance" scope="cd">
                            <parameter expr="'elements'"/>
                        </raise>
                        <raise event="delete_instance" scope="cd">
                            <parameter expr="'connecting_lines'"/>
                        </raise>
                        <script>
                            self.group_location = {}
                            self.layers = []
                        </script>
                    </transition>
                </state>
            </state>

            <state id="update_loading">
                <state id="updating">
                    <transition after="self.sccd_yield() + 0.1" target=".">
                        <script>
                            for i in self.elems:
                                self.itemconfigure(i[1], image=self.loading[i[0]])
                                i[0] = (i[0] + 1) % 8
                        </script>
                    </transition>
                </state>
            </state>
        </parallel>
    </scxml>
</class>