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/*
* Functions and callbacks for generic SVG view and widget.
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Ralf Stephan <ralf@ark.in-berlin.de>
* Abhishek Sharma
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 2010 authors
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "display/sp-canvas.h"
#include "display/sp-canvas-group.h"
#include "display/canvas-arena.h"
#include "document.h"
#include "svg-view.h"
#include "svg-view-widget.h"
#include "util/units.h"
static void sp_svg_view_widget_dispose(GObject *object);
static void sp_svg_view_widget_size_allocate (GtkWidget *widget, GtkAllocation *allocation);
static void sp_svg_view_widget_size_request (GtkWidget *widget, GtkRequisition *req);
static void sp_svg_view_widget_get_preferred_width(GtkWidget *widget,
gint *minimal_width,
gint *natural_width);
static void sp_svg_view_widget_get_preferred_height(GtkWidget *widget,
gint *minimal_height,
gint *natural_height);
static void sp_svg_view_widget_view_resized (SPViewWidget *vw, Inkscape::UI::View::View *view, gdouble width, gdouble height);
G_DEFINE_TYPE(SPSVGSPViewWidget, sp_svg_view_widget, SP_TYPE_VIEW_WIDGET);
/**
* Callback to initialize SPSVGSPViewWidget vtable.
*/
static void sp_svg_view_widget_class_init(SPSVGSPViewWidgetClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
SPViewWidgetClass *vw_class = SP_VIEW_WIDGET_CLASS (klass);
object_class->dispose = sp_svg_view_widget_dispose;
widget_class->size_allocate = sp_svg_view_widget_size_allocate;
widget_class->get_preferred_width = sp_svg_view_widget_get_preferred_width;
widget_class->get_preferred_height = sp_svg_view_widget_get_preferred_height;
vw_class->view_resized = sp_svg_view_widget_view_resized;
}
/**
* Callback to initialize SPSVGSPViewWidget object.
*/
static void sp_svg_view_widget_init(SPSVGSPViewWidget *vw)
{
SPCanvasItem *parent;
/* Settings */
vw->resize = FALSE;
vw->maxwidth = 400.0;
vw->maxheight = 400.0;
/* ScrolledWindow */
vw->sw = gtk_scrolled_window_new (nullptr, nullptr);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW(vw->sw), GTK_SHADOW_NONE);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (vw->sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_container_add (GTK_CONTAINER (vw), vw->sw);
gtk_widget_show (vw->sw);
/* Canvas */
vw->canvas = SPCanvas::createAA();
auto css_provider = gtk_css_provider_new();
auto style_context = gtk_widget_get_style_context(GTK_WIDGET(vw->canvas));
gtk_css_provider_load_from_data(css_provider,
"SPCanvas {\n"
" background-color: white;\n"
"}\n",
-1, nullptr);
gtk_style_context_add_provider(style_context,
GTK_STYLE_PROVIDER(css_provider),
GTK_STYLE_PROVIDER_PRIORITY_USER);
gtk_container_add (GTK_CONTAINER (vw->sw), vw->canvas);
gtk_widget_show (vw->canvas);
/* View */
parent = sp_canvas_item_new(SP_CANVAS(vw->canvas)->getRoot(), SP_TYPE_CANVAS_GROUP, nullptr);
Inkscape::UI::View::View *view = Inkscape::GC::release(new SPSVGView (SP_CANVAS_GROUP (parent)));
sp_view_widget_set_view (SP_VIEW_WIDGET (vw), view);
}
/*
* Destructor callback for SPSVGSPViewWidget objects.
*/
static void sp_svg_view_widget_dispose(GObject *object)
{
SPSVGSPViewWidget *vw = SP_SVG_VIEW_WIDGET (object);
vw->canvas = nullptr;
if (G_OBJECT_CLASS(sp_svg_view_widget_parent_class)->dispose) {
G_OBJECT_CLASS(sp_svg_view_widget_parent_class)->dispose(object);
}
}
/**
* Callback connected with size_request signal.
*/
static void sp_svg_view_widget_size_request(GtkWidget *widget, GtkRequisition *req)
{
SPSVGSPViewWidget *vw = SP_SVG_VIEW_WIDGET (widget);
Inkscape::UI::View::View *v = SP_VIEW_WIDGET_VIEW (widget);
if (GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_width &&
GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_height) {
gint width_min, height_min, width_nat, height_nat;
GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_width(widget, &width_min, &width_nat);
GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->get_preferred_height(widget, &height_min, &height_nat);
req->width=width_min;
req->height=height_min;
}
if (v->doc()) {
SPSVGView *svgv;
GtkPolicyType hpol, vpol;
gdouble width, height;
svgv = static_cast<SPSVGView*> (v);
width = (v->doc())->getWidth().value("px") * svgv->_hscale;
height = (v->doc())->getHeight().value("px") * svgv->_vscale;
if (width <= vw->maxwidth) {
hpol = GTK_POLICY_NEVER;
req->width = (gint) (width + 0.5);
} else {
hpol = GTK_POLICY_AUTOMATIC;
req->width = (gint) (vw->maxwidth + 0.5);
}
if (height <= vw->maxheight) {
vpol = GTK_POLICY_NEVER;
req->height = (gint) (height + 8.0);
} else {
vpol = GTK_POLICY_AUTOMATIC;
req->height = (gint) (vw->maxheight + 2.0);
}
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (vw->sw), hpol, vpol);
}
}
static void sp_svg_view_widget_get_preferred_width(GtkWidget *widget, gint *minimal_width, gint *natural_width)
{
GtkRequisition requisition;
sp_svg_view_widget_size_request(widget, &requisition);
*minimal_width = *natural_width = requisition.width;
}
static void sp_svg_view_widget_get_preferred_height(GtkWidget *widget, gint *minimal_height, gint *natural_height)
{
GtkRequisition requisition;
sp_svg_view_widget_size_request(widget, &requisition);
*minimal_height = *natural_height = requisition.height;
}
/**
* Callback connected with size_allocate signal.
*/
static void sp_svg_view_widget_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
{
SPSVGSPViewWidget *svgvw = SP_SVG_VIEW_WIDGET (widget);
if (GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->size_allocate) {
GTK_WIDGET_CLASS(sp_svg_view_widget_parent_class)->size_allocate(widget, allocation);
}
if (!svgvw->resize) {
static_cast<SPSVGView*>(SP_VIEW_WIDGET_VIEW (svgvw))->setRescale (TRUE, TRUE,
(gdouble) allocation->width - 1.0, (gdouble) allocation->height - 1.0);
}
}
/**
* Callback connected with view_resized signal.
*/
static void sp_svg_view_widget_view_resized(SPViewWidget *vw, Inkscape::UI::View::View */*view*/, gdouble width, gdouble height)
{
SPSVGSPViewWidget *svgvw = SP_SVG_VIEW_WIDGET (vw);
if (svgvw->resize) {
gtk_widget_set_size_request (svgvw->canvas, (int)width, (int)height);
gtk_widget_queue_resize (GTK_WIDGET (vw));
}
}
GtkWidget *sp_svg_view_widget_new(SPDocument *doc)
{
GtkWidget *widget;
g_return_val_if_fail (doc != nullptr, NULL);
widget = (GtkWidget*)g_object_new (SP_TYPE_SVG_VIEW_WIDGET, nullptr);
reinterpret_cast<SPSVGView*>(SP_VIEW_WIDGET_VIEW (widget))->setDocument (doc);
return widget;
}
void SPSVGSPViewWidget::setResize(bool resize, gdouble width, gdouble height)
{
g_return_if_fail( !resize || (width > 0.0) );
g_return_if_fail( !resize || (height > 0.0) );
this->resize = resize;
this->maxwidth = width;
this->maxheight = height;
if ( resize ) {
gtk_widget_queue_resize( GTK_WIDGET(this) );
}
}
/*
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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