本文整理汇总了C++中SPDesktop::setCurrentLayer方法的典型用法代码示例。如果您正苦于以下问题：C++ SPDesktop::setCurrentLayer方法的具体用法？C++ SPDesktop::setCurrentLayer怎么用？C++ SPDesktop::setCurrentLayer使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SPDesktop的用法示例。
在下文中一共展示了SPDesktop::setCurrentLayer方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: sp_selection_move_screen
static gint
sp_select_context_root_handler(SPEventContext *event_context, GdkEvent *event)
{
SPItem *item = NULL;
SPItem *item_at_point = NULL, *group_at_point = NULL, *item_in_group = NULL;
gint ret = FALSE;
SPDesktop *desktop = event_context->desktop;
SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
Inkscape::SelTrans *seltrans = sc->_seltrans;
Inkscape::Selection *selection = sp_desktop_selection(desktop);
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
// make sure we still have valid objects to move around
if (sc->item && SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))==NULL) {
sp_select_context_abort(event_context);
}
switch (event->type) {
case GDK_2BUTTON_PRESS:
if (event->button.button == 1) {
if (!selection->isEmpty()) {
SPItem *clicked_item = (SPItem *) selection->itemList()->data;
if (SP_IS_GROUP(clicked_item) && !SP_IS_BOX3D(clicked_item)) { // enter group if it's not a 3D box
desktop->setCurrentLayer(reinterpret_cast<SPObject *>(clicked_item));
sp_desktop_selection(desktop)->clear();
sc->dragging = false;
sp_event_context_discard_delayed_snap_event(event_context);
desktop->canvas->end_forced_full_redraws();
} else { // switch tool
Geom::Point const button_pt(event->button.x, event->button.y);
Geom::Point const p(desktop->w2d(button_pt));
tools_switch_by_item (desktop, clicked_item, p);
}
} else {
sp_select_context_up_one_layer(desktop);
}
ret = TRUE;
}
break;
case GDK_BUTTON_PRESS:
if (event->button.button == 1 && !event_context->space_panning) {
// save drag origin
xp = (gint) event->button.x;
yp = (gint) event->button.y;
within_tolerance = true;
Geom::Point const button_pt(event->button.x, event->button.y);
Geom::Point const p(desktop->w2d(button_pt));
if (event->button.state & GDK_MOD1_MASK)
Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
Inkscape::Rubberband::get(desktop)->start(desktop, p);
if (sc->grabbed) {
sp_canvas_item_ungrab(sc->grabbed, event->button.time);
sc->grabbed = NULL;
}
sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK,
NULL, event->button.time);
sc->grabbed = SP_CANVAS_ITEM(desktop->acetate);
// remember what modifiers were on before button press
sc->button_press_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
sc->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
sc->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
sc->moved = FALSE;
rb_escaped = drag_escaped = 0;
ret = TRUE;
} else if (event->button.button == 3) {
// right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
sp_select_context_abort(event_context);
}
break;
case GDK_MOTION_NOTIFY:
tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
Geom::Point const motion_pt(event->motion.x, event->motion.y);
Geom::Point const p(desktop->w2d(motion_pt));
if ( within_tolerance
&& ( abs( (gint) event->motion.x - xp ) < tolerance )
&& ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
break; // do not drag if we're within tolerance from origin
}
// Once the user has moved farther than tolerance from the original location
// (indicating they intend to move the object, not click), then always process the
// motion notify coordinates as given (no snapping back to origin)
within_tolerance = false;
if (sc->button_press_ctrl || (sc->button_press_alt && !sc->button_press_shift && !selection->isEmpty())) {
// if it's not click and ctrl or alt was pressed (the latter with some selection
// but not with shift) we want to drag rather than rubberband
sc->dragging = TRUE;
desktop->setCursor(SP_SELECT_D_CURSOR);
//.........这里部分代码省略.........