init

lib/actions/rs_preview.cpp

@@ -0,0 +1,190 @@
+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
+** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
+**
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file gpl-2.0.txt included in the
+** packaging of this file.
+**
+** This program 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.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+**
+** This copyright notice MUST APPEAR in all copies of the script!
+**
+**********************************************************************/
+
+#include "rs_preview.h"
+#include "rs_entitycontainer.h"
+#include "rs_line.h"
+#include "rs_graphicview.h"
+#include "rs_information.h"
+#include "rs_settings.h"
+
+/**
+ * Constructor.
+ */
+RS_Preview::RS_Preview(RS_EntityContainer* parent)
+		: RS_EntityContainer(parent, true) {
+
+    RS_SETTINGS->beginGroup("/Appearance");
+    maxEntities = RS_SETTINGS->readNumEntry("/MaxPreview", 100);
+    RS_SETTINGS->endGroup();
+}
+
+/**
+ * Adds an entity to this preview and removes any attributes / layer
+ * connections before that.
+ */
+void RS_Preview::addEntity(RS_Entity* entity) {
+	if (!entity || entity->isUndone()) {
+        return;
+    }
+
+    // only border preview for complex entities:
+    //if ((entity->count() > maxEntities-count()) &&
+
+    bool addBorder = false;
+
+    if (entity->rtti()==RS2::EntityImage || entity->rtti()==RS2::EntityHatch ||
+                entity->rtti()==RS2::EntityInsert) {
+
+        addBorder = true;
+    } else {
+        if (entity->isContainer() && entity->rtti()!=RS2::EntitySpline) {
+            if (entity->countDeep() > maxEntities-countDeep()) {
+                addBorder = true;
+            }
+        }
+    }
+
+    if (addBorder) {
+        RS_Vector min = entity->getMin();
+        RS_Vector max = entity->getMax();
+
+        RS_Line* l1 =
+			new RS_Line(this, {min.x, min.y}, {max.x, min.y});
+        RS_Line* l2 =
+			new RS_Line(this, {max.x, min.y}, {max.x, max.y});
+        RS_Line* l3 =
+			new RS_Line(this, {max.x, max.y}, {min.x, max.y});
+        RS_Line* l4 =
+			new RS_Line(this, {min.x, max.y}, {min.x, min.y});
+
+        RS_EntityContainer::addEntity(l1);
+        RS_EntityContainer::addEntity(l2);
+        RS_EntityContainer::addEntity(l3);
+        RS_EntityContainer::addEntity(l4);
+
+        delete entity;
+        entity = nullptr;
+    } else {
+        entity->setLayer(nullptr);
+        entity->setSelected(false);
+        entity->reparent(this);
+                // Don't set this pen, let drawing routines decide entity->setPenToActive();
+        RS_EntityContainer::addEntity(entity);
+    }
+}
+
+/**
+ * Clones the given entity and adds the clone to the preview.
+ */
+void RS_Preview::addCloneOf(RS_Entity* entity) {
+    if (!entity) {
+        return;
+    }
+
+    RS_Entity* clone = entity->clone();
+    clone->reparent(this);
+    addEntity(clone);
+}
+
+/**
+ * Adds all entities from 'container' to the preview (unselected).
+ */
+void RS_Preview::addAllFrom(RS_EntityContainer& container) {
+	int c=0;
+	for(auto e: container){
+
+        if (c<maxEntities) {
+            RS_Entity* clone = e->clone();
+            clone->setSelected(false);
+            clone->reparent(this);
+
+            c+=clone->countDeep();
+            addEntity(clone);
+            // clone might be nullptr after this point
+        }
+    }
+}
+
+/**
+ * Adds all selected entities from 'container' to the preview (unselected).
+ */
+void RS_Preview::addSelectionFrom(RS_EntityContainer& container) {
+	int c=0;
+	for(auto e: container){
+
+        if (e->isSelected() && c<maxEntities) {
+            RS_Entity* clone = e->clone();
+            clone->setSelected(false);
+            clone->reparent(this);
+
+            c+=clone->countDeep();
+            addEntity(clone);
+            // clone might be nullptr after this point
+        }
+    }
+}
+
+/**
+ * Adds all entities in the given range and those which have endpoints
+ * in the given range to the preview.
+ */
+void RS_Preview::addStretchablesFrom(RS_EntityContainer& container,
+                                     const RS_Vector& v1, const RS_Vector& v2) {
+    int c=0;
+
+	for(auto e: container){
+
+        if (e->isVisible() &&
+                e->rtti()!=RS2::EntityHatch &&
+                ((e->isInWindow(v1, v2)) ||
+                 e->hasEndpointsWithinWindow(v1, v2)) &&
+
+                c<maxEntities) {
+
+            RS_Entity* clone = e->clone();
+            //clone->setSelected(false);
+            clone->reparent(this);
+
+            c+=clone->countDeep();
+            addEntity(clone);
+            // clone might be nullptr after this point
+        }
+    }
+}
+
+void RS_Preview::draw(RS_Painter* painter, RS_GraphicView* view,
+                              double& patternOffset) {
+
+    if (!(painter && view)) {
+        return;
+    }
+
+    foreach (auto e, entities)
+    {
+        e->draw(painter, view, patternOffset);
+    }
+}