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/** \file
* Functions and callbacks for generic SVG view and widget
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Ralf Stephan <ralf@ark.in-berlin.de>
* Jon A. Cruz <jon@joncruz.org>
* Abhishek Sharma
*
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <2geom/transforms.h>
#include "display/canvas-arena.h"
#include "display/drawing-group.h"
#include "document.h"
#include "sp-item.h"
#include "svg-view.h"
#include "sp-root.h"
/**
* Constructs new SPSVGView object and returns pointer to it.
*/
SPSVGView::SPSVGView (SPCanvasGroup *parent)
{
_hscale = 1.0;
_vscale = 1.0;
_rescale = FALSE;
_keepaspect = FALSE;
_width = 0.0;
_height = 0.0;
_dkey = 0;
_drawing = 0;
_parent = parent;
}
SPSVGView::~SPSVGView()
{
if (doc() && _drawing)
{
doc()->getRoot()->invoke_hide(_dkey);
_drawing = NULL;
}
}
/**
* Rescales SPSVGView to given proportions.
*/
void
SPSVGView::setScale (gdouble hscale, gdouble vscale)
{
if (!_rescale && ((hscale != _hscale) || (vscale != _vscale))) {
_hscale = hscale;
_vscale = vscale;
doRescale (true);
}
}
/**
* Rescales SPSVGView and keeps aspect ratio.
*/
void
SPSVGView::setRescale
(bool rescale, bool keepaspect, gdouble width, gdouble height)
{
g_return_if_fail (!rescale || (width >= 0.0));
g_return_if_fail (!rescale || (height >= 0.0));
_rescale = rescale;
_keepaspect = keepaspect;
_width = width;
_height = height;
doRescale (true);
}
/**
* Helper function that sets rescale ratio and emits resize event.
*/
void
SPSVGView::doRescale (bool event)
{
if (!doc()) return;
if (doc()->getWidth () < 1e-9) return;
if (doc()->getHeight () < 1e-9) return;
if (_rescale) {
_hscale = _width / doc()->getWidth ();
_vscale = _height / doc()->getHeight ();
if (_keepaspect) {
if (_hscale > _vscale) {
_hscale = _vscale;
} else {
_vscale = _hscale;
}
}
}
if (_drawing) {
sp_canvas_item_affine_absolute (_drawing, Geom::Scale(_hscale, _vscale));
}
if (event) {
emitResized (doc()->getWidth () * _hscale,
doc()->getHeight () * _vscale);
}
}
void
SPSVGView::mouseover()
{
GdkCursor *cursor = gdk_cursor_new(GDK_HAND2);
gdk_window_set_cursor(GTK_WIDGET(SP_CANVAS_ITEM(_drawing)->canvas)->window, cursor);
gdk_cursor_unref(cursor);
}
void
SPSVGView::mouseout()
{
gdk_window_set_cursor(GTK_WIDGET(SP_CANVAS_ITEM(_drawing)->canvas)->window, NULL);
}
//----------------------------------------------------------------
/**
* Callback connected with arena_event.
*/
/// \todo fixme.
static gint
arena_handler (SPCanvasArena */*arena*/, Inkscape::DrawingItem *ai, GdkEvent *event, SPSVGView *svgview)
{
static gdouble x, y;
static gboolean active = FALSE;
SPEvent spev;
SPItem *spitem = (ai) ? (SPItem*) ai->data() : 0;
switch (event->type) {
case GDK_BUTTON_PRESS:
if (event->button.button == 1) {
active = TRUE;
x = event->button.x;
y = event->button.y;
}
break;
case GDK_BUTTON_RELEASE:
if (event->button.button == 1) {
if (active && (event->button.x == x) &&
(event->button.y == y)) {
spev.type = SP_EVENT_ACTIVATE;
if ( spitem != 0 )
{
spitem->emitEvent (spev);
}
}
}
active = FALSE;
break;
case GDK_MOTION_NOTIFY:
active = FALSE;
break;
case GDK_ENTER_NOTIFY:
spev.type = SP_EVENT_MOUSEOVER;
spev.data = svgview;
if ( spitem != 0 )
{
spitem->emitEvent (spev);
}
break;
case GDK_LEAVE_NOTIFY:
spev.type = SP_EVENT_MOUSEOUT;
spev.data = svgview;
if ( spitem != 0 )
{
spitem->emitEvent (spev);
}
break;
default:
break;
}
return TRUE;
}
/**
* Callback connected with set_document signal.
*/
void
SPSVGView::setDocument (SPDocument *document)
{
if (doc()) {
doc()->getRoot()->invoke_hide(_dkey);
}
if (!_drawing) {
_drawing = sp_canvas_item_new (_parent, SP_TYPE_CANVAS_ARENA, NULL);
g_signal_connect (G_OBJECT (_drawing), "arena_event", G_CALLBACK (arena_handler), this);
}
View::setDocument (document);
if (document) {
Inkscape::DrawingItem *ai = document->getRoot()->invoke_show(
SP_CANVAS_ARENA (_drawing)->drawing,
_dkey,
SP_ITEM_SHOW_DISPLAY);
if (ai) {
SP_CANVAS_ARENA (_drawing)->drawing.root()->prependChild(ai);
}
doRescale (!_rescale);
}
}
/**
* Callback connected with document_resized signal.
*/
void
SPSVGView::onDocumentResized (gdouble width, gdouble height)
{
setScale (width, height);
doRescale (!_rescale);
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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