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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glibmm/i18n.h>
#include "sp-item.h"
#include "desktop.h"
#include "message-context.h"
#include "message-stack.h"
#include "context-fns.h"
#include "snap.h"
#include "desktop-affine.h"
#include "event-context.h"
#include "sp-namedview.h"
/* FIXME: could probably use a template here */
/**
* Check to see if the current layer is both unhidden and unlocked. If not,
* set a message about it on the given context.
*
* \param desktop Desktop.
* \param message Message context to put messages on.
* \return true if the current layer is both unhidden and unlocked, otherwise false.
*/
bool Inkscape::have_viable_layer(SPDesktop *desktop, MessageContext *message)
{
SPItem const *layer = SP_ITEM(desktop->currentLayer());
if ( !layer || desktop->itemIsHidden(layer) ) {
message->flash(Inkscape::ERROR_MESSAGE,
_("<b>Current layer is hidden</b>. Unhide it to be able to draw on it."));
return false;
}
if ( !layer || layer->isLocked() ) {
message->flash(Inkscape::ERROR_MESSAGE,
_("<b>Current layer is locked</b>. Unlock it to be able to draw on it."));
return false;
}
return true;
}
/**
* Check to see if the current layer is both unhidden and unlocked. If not,
* set a message about it on the given context.
*
* \param desktop Desktop.
* \param message Message context to put messages on.
* \return true if the current layer is both unhidden and unlocked, otherwise false.
*/
bool Inkscape::have_viable_layer(SPDesktop *desktop, MessageStack *message)
{
SPItem const *layer = SP_ITEM(desktop->currentLayer());
if ( !layer || desktop->itemIsHidden(layer) ) {
message->flash(Inkscape::WARNING_MESSAGE,
_("<b>Current layer is hidden</b>. Unhide it to be able to draw on it."));
return false;
}
if ( !layer || layer->isLocked() ) {
message->flash(Inkscape::WARNING_MESSAGE,
_("<b>Current layer is locked</b>. Unlock it to be able to draw on it."));
return false;
}
return true;
}
NR::Rect Inkscape::snap_rectangular_box(SPDesktop const *desktop, SPItem *item,
NR::Point const &pt, NR::Point const ¢er, int state)
{
NR::Point p[2];
bool const shift = state & GDK_SHIFT_MASK;
bool const control = state & GDK_CONTROL_MASK;
SnapManager const &m = desktop->namedview->snap_manager;
if (control) {
/* Control is down: we are constrained to producing integer-ratio rectangles */
/* Vector from the centre of the box to the point we are dragging to */
NR::Point delta = pt - center;
/* Round it so that we have an integer-ratio box */
if (fabs(delta[NR::X]) > fabs(delta[NR::Y]) && (delta[NR::Y] != 0.0)) {
delta[NR::X] = floor(delta[NR::X] / delta[NR::Y] + 0.5) * delta[NR::Y];
} else if (delta[NR::X] != 0.0) {
delta[NR::Y] = floor(delta[NR::Y] / delta[NR::X] + 0.5) * delta[NR::X];
}
/* p[1] is the dragged point with the integer-ratio constraint */
p[1] = center + delta;
if (shift) {
/* Shift is down, so our origin is the centre point rather than the corner
** point; this means that corner-point movements are bound to each other.
*/
/* p[0] is the opposite corner of our box */
p[0] = center - delta;
Inkscape::SnappedPoint s[2];
/* Try to snap p[0] (the opposite corner) along the constraint vector */
s[0] = m.constrainedSnap(Inkscape::Snapper::SNAP_POINT, p[0],
Inkscape::Snapper::ConstraintLine(p[0] - p[1]), item);
/* Try to snap p[1] (the dragged corner) along the constraint vector */
s[1] = m.constrainedSnap(Inkscape::Snapper::SNAP_POINT, p[1],
Inkscape::Snapper::ConstraintLine(p[1] - p[0]), item);
/* Choose the best snap and update points accordingly */
if (s[0].getDistance() < s[1].getDistance()) {
p[0] = s[0].getPoint();
p[1] = 2 * center - s[0].getPoint();
} else {
p[0] = 2 * center - s[1].getPoint();
p[1] = s[1].getPoint();
}
} else {
/* Our origin is the opposite corner. Snap the drag point along the constraint vector */
p[0] = center;
p[1] = m.constrainedSnap(Inkscape::Snapper::SNAP_POINT, p[1],
Inkscape::Snapper::ConstraintLine(p[1] - p[0]), item).getPoint();
}
} else if (shift) {
/* Shift is down, so our origin is the centre point rather than the corner point;
** this means that corner-point movements are bound to each other.
*/
p[1] = pt;
p[0] = 2 * center - p[1];
Inkscape::SnappedPoint s[2];
s[0] = m.freeSnap(Inkscape::Snapper::SNAP_POINT, p[0], item);
s[1] = m.freeSnap(Inkscape::Snapper::SNAP_POINT, p[1], item);
if (s[0].getDistance() < s[1].getDistance()) {
p[0] = s[0].getPoint();
p[1] = 2 * center - s[0].getPoint();
} else {
p[0] = 2 * center - s[1].getPoint();
p[1] = s[1].getPoint();
}
} else {
/* There's no constraint on the corner point, so just snap it to anything */
p[0] = center;
p[1] = m.freeSnap(Inkscape::Snapper::SNAP_POINT, pt, item).getPoint();
}
p[0] = sp_desktop_dt2root_xy_point(desktop, p[0]);
p[1] = sp_desktop_dt2root_xy_point(desktop, p[1]);
return NR::Rect(NR::Point(MIN(p[0][NR::X], p[1][NR::X]), MIN(p[0][NR::Y], p[1][NR::Y])),
NR::Point(MAX(p[0][NR::X], p[1][NR::X]), MAX(p[0][NR::Y], p[1][NR::Y])));
}
NR::Point Inkscape::setup_for_drag_start(SPDesktop *desktop, SPEventContext* ec, GdkEvent *ev)
{
ec->xp = static_cast<gint>(ev->button.x);
ec->yp = static_cast<gint>(ev->button.y);
ec->within_tolerance = true;
NR::Point const p(ev->button.x, ev->button.y);
ec->item_to_select = sp_event_context_find_item(desktop, p, ev->button.state & GDK_MOD1_MASK, TRUE);
return ec->desktop->w2d(p);
}
/*
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:encoding=utf-8:textwidth=99 :
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