--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file state_zoom.cpp
+** \brief Zoom Tool Implementation File
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2008 Chris Moore
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+# include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <sigc++/signal.h>
+#include <sigc++/object.h>
+
+#include <ETL/handle>
+#include <synfig/vector.h>
+
+
+#include "state_zoom.h"
+#include "event_mouse.h"
+#include "canvasview.h"
+#include "workarea.h"
+#include "app.h"
+#include "toolbox.h"
+#include <synfigapp/main.h>
+
+#include "general.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace synfig;
+using namespace studio;
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+StateZoom studio::state_zoom;
+
+const float ZOOMFACTOR = 1.25f;
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+class studio::StateZoom_Context : public sigc::trackable
+{
+ etl::handle<CanvasView> canvas_view_;
+ CanvasView::IsWorking is_working;
+
+ Point p1,p2;
+
+ bool prev_workarea_layer_status_;
+
+public:
+
+ //events
+ Smach::event_result event_stop_handler(const Smach::event& x);
+ Smach::event_result event_refresh_handler(const Smach::event& x);
+ Smach::event_result event_mouse_click_handler(const Smach::event& x);
+
+ //constructor destructor
+ StateZoom_Context(CanvasView* canvas_view);
+ ~StateZoom_Context();
+
+ //Canvas interaction
+ const etl::handle<CanvasView>& get_canvas_view()const{return canvas_view_;}
+ etl::handle<synfigapp::CanvasInterface> get_canvas_interface()const{return canvas_view_->canvas_interface();}
+ synfig::Canvas::Handle get_canvas()const{return canvas_view_->get_canvas();}
+ WorkArea * get_work_area()const{return canvas_view_->get_work_area();}
+
+ //void zoom(const Point& p1, const Point& p2);
+
+}; // END of class StateZoom_Context
+
+/* === M E T H O D S ======================================================= */
+
+StateZoom::StateZoom():
+ Smach::state<StateZoom_Context>("zoom")
+{
+ insert(event_def(EVENT_STOP,&StateZoom_Context::event_stop_handler));
+ insert(event_def(EVENT_REFRESH,&StateZoom_Context::event_refresh_handler));
+ insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DOWN,&StateZoom_Context::event_mouse_click_handler));
+ //insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,&StateZoom_Context::event_mouse_click_handler));
+ insert(event_def(EVENT_WORKAREA_BOX,&StateZoom_Context::event_mouse_click_handler));
+ //insert(event_def(EVENT_WORKAREA_BUTTON_CLICK,&StateZoom_Context::event_mouse_click_handler));
+ insert(event_def(EVENT_WORKAREA_MOUSE_BUTTON_UP,&StateZoom_Context::event_mouse_click_handler));
+}
+
+StateZoom::~StateZoom()
+{
+}
+
+StateZoom_Context::StateZoom_Context(CanvasView* canvas_view):
+ canvas_view_(canvas_view),
+ is_working(*canvas_view),
+ prev_workarea_layer_status_(get_work_area()->get_allow_layer_clicks())
+{
+ // Turn off layer clicking
+ get_work_area()->set_allow_layer_clicks(false);
+
+ // clear out the ducks
+ get_work_area()->clear_ducks(); //???
+
+ // Refresh the work area
+ get_work_area()->queue_draw();
+
+ // Hide the tables if they are showing
+ //prev_table_status=get_canvas_view()->tables_are_visible();
+ //if(prev_table_status)get_canvas_view()->hide_tables();
+
+ // Disable the time bar
+ //get_canvas_view()->set_sensitive_timebar(false);
+
+ // Connect a signal
+ //get_work_area()->signal_user_click().connect(sigc::mem_fun(*this,&studio::StateZoom_Context::on_user_click));
+ get_canvas_view()->work_area->set_cursor(Gdk::CROSSHAIR);
+
+ App::toolbox->refresh();
+}
+
+StateZoom_Context::~StateZoom_Context()
+{
+ // Restore layer clicking
+ get_work_area()->set_allow_layer_clicks(prev_workarea_layer_status_);
+ get_canvas_view()->work_area->reset_cursor();
+
+ // Enable the time bar
+ //get_canvas_view()->set_sensitive_timebar(true);
+
+ // Bring back the tables if they were out before
+ //if(prev_table_status)get_canvas_view()->show_tables();
+
+ // Refresh the work area
+ get_work_area()->queue_draw();
+
+ App::toolbox->refresh();
+
+ get_canvas_view()->get_smach().process_event(EVENT_REFRESH_DUCKS);
+}
+
+Smach::event_result
+StateZoom_Context::event_stop_handler(const Smach::event& /*x*/)
+{
+ throw Smach::egress_exception();
+}
+
+Smach::event_result
+StateZoom_Context::event_refresh_handler(const Smach::event& /*x*/)
+{
+ return Smach::RESULT_ACCEPT;
+}
+
+Smach::event_result
+StateZoom_Context::event_mouse_click_handler(const Smach::event& x)
+{
+ if(x.key==EVENT_WORKAREA_BOX)
+ {
+ const EventBox& event(*reinterpret_cast<const EventBox*>(&x));
+
+ if(event.button==BUTTON_LEFT)
+ {
+ Point tl = get_work_area()->get_window_tl();
+ Point br = get_work_area()->get_window_br();
+ Vector window_span = br - tl, window_middle = (br+tl)/2;
+ Vector box_span = event.p2 - event.p1, box_middle = (event.p1+event.p2)/2;
+ Point newpos;
+ float zoom;
+
+ if(event.modifier & Gdk::CONTROL_MASK) //zoom out...
+ {
+ if (window_span[0] == 0 || window_span[1] == 0) zoom = 1;
+ else zoom = max(abs(box_span[0]/window_span[0]), abs(box_span[1]/window_span[1]));
+
+ // focus_point is -1 times the real position for some reason...
+ // center the window so the old contents fill the drawn box
+ newpos = -((window_middle - box_middle)/zoom + window_middle);
+ }
+ else // zoom in
+ {
+ if (box_span[0] == 0 || box_span[1] == 0) zoom = 1;
+ else zoom = min(abs(window_span[0]/box_span[0]), abs(window_span[1]/box_span[1]));
+
+ // center the window at the center of the box
+ newpos = -(-get_work_area()->get_focus_point() + (box_middle - window_middle));
+ }
+
+ get_work_area()->set_focus_point(newpos);
+ get_work_area()->set_zoom(get_work_area()->get_zoom()*zoom);
+
+ return Smach::RESULT_ACCEPT;
+ }
+ }
+
+ if(x.key==EVENT_WORKAREA_MOUSE_BUTTON_UP)
+ {
+ const EventMouse& event(*reinterpret_cast<const EventMouse*>(&x));
+
+ if(event.button==BUTTON_LEFT)
+ {
+ Point evpos;
+
+ //make the event pos be in the same space...
+ // The weird ass inverted center normalized space...
+ {
+ const Point realcenter = (get_work_area()->get_window_tl() + get_work_area()->get_window_br())/2;
+ evpos = -(event.pos - realcenter) + get_work_area()->get_focus_point();
+ }
+
+ /* Zooming:
+ focus point must zoom about the point evpos...
+
+ trans about an origin not 0:
+ p' = A(p - o) + o
+ */
+
+ Vector v = get_work_area()->get_focus_point() - evpos;
+
+ if(event.modifier & Gdk::CONTROL_MASK) //zoom out...
+ {
+ v*=ZOOMFACTOR;
+ //get_work_area()->zoom_out();
+ get_work_area()->set_focus_point(evpos + v);
+ get_work_area()->set_zoom(get_work_area()->get_zoom()/ZOOMFACTOR);
+ }else //zoom in
+ {
+ v/=ZOOMFACTOR;
+ //get_work_area()->zoom_in();
+ get_work_area()->set_focus_point(evpos + v);
+ get_work_area()->set_zoom(get_work_area()->get_zoom()*ZOOMFACTOR);
+ }
+
+ return Smach::RESULT_ACCEPT;
+ }
+ }
+
+ return Smach::RESULT_OK;
+}
projects / synfig.git / blobdiff