Add XML files for reading and writing

1 files changed, 109 insertions, 18 deletions

diff --git a/interactioncanvas.cpp b/interactioncanvas.cpp
index 80a4317..3236be1 100644
--- a/interactioncanvas.cpp
+++ b/interactioncanvas.cpp
@@ -1,7 +1,7 @@
 #include "interactioncanvas.h"
 
 InteractionCanvas::InteractionCanvas(QWidget *parent)
-    :QLabel(parent)
+    : QLabel(parent)
 {
     setFocusPolicy(Qt::StrongFocus);
     setMouseTracking(true);
@@ -9,19 +9,27 @@ InteractionCanvas::InteractionCanvas(QWidget *parent)
     m_SelectedLine = NULL;
 }
 
-InteractionCanvas::~InteractionCanvas()
+void InteractionCanvas::clearLines()
 {
-    for(int i = 0; i < m_Lines.size(); i++)
+    for (int i = 0; i < m_Lines.size(); i++)
     {
         delete m_Lines[i];
-        m_Lines.removeAt(i);
     }
-    if(m_NewLine)
+
+    m_Lines.clear();
+}
+
+InteractionCanvas::~InteractionCanvas()
+{
+    clearLines();
+
+    if (m_NewLine)
     {
         delete m_NewLine;
         m_NewLine = NULL;
     }
-    if(m_SelectedLine)
+
+    if (m_SelectedLine)
     {
         delete m_SelectedLine;
         m_SelectedLine = NULL;
@@ -66,22 +74,100 @@ void InteractionCanvas::addPolygon()
     changeSelectedLine(tmpLine);
 }
 
+void InteractionCanvas::read(QFile *file)
+{
+    m_fileName.setContent(file, false);
+
+    QDomElement root = m_fileName.documentElement();
+
+    if (root.tagName() == "geometric_objects")
+    {
+        QDomElement child = root.firstChildElement();
+
+        Line *line = NULL;
+
+        clearLines();
+
+        while (!child.isNull())
+        {
+            line = NULL;
+
+            if (child.tagName() == "Line")
+            {
+                line = new Line();
+            }
+
+            if (child.tagName() == "Rectangle")
+            {
+                line = new Rectangle();
+            }
+
+            if (child.tagName() == "Ellipse")
+            {
+                line = new Ellipse();
+            }
+
+            if (child.tagName() == "Polygon")
+            {
+                line = new Polygon();
+            }
+
+            if (line != NULL)
+            {
+                line->fromDomElement(child);
+                line->setSelected(false);
+                m_Lines.append(line);
+            }
+
+            child = child.nextSiblingElement();
+        }
+    }
+}
+
+void InteractionCanvas::write(QFile *file)
+{
+    const int IndentSize = 4;
+
+    m_fileName.clear();
+
+    QDomElement root = m_fileName.createElement("geometric_objects");
+
+    m_fileName.appendChild(root);
+
+    QListIterator<Line *> childs(m_Lines);
+
+    Line *child = NULL;
+
+    while (childs.hasNext())
+    {
+        child = childs.next();
+
+        root.appendChild(child->toDomElement(&m_fileName));
+    }
+
+    QTextStream out(file);
+    m_fileName.save(out, IndentSize);
+}
+
 void InteractionCanvas::mouseMoveEvent(QMouseEvent *mouseEvent)
 {
     qDebug() << "InteractionCanvas:" << mouseEvent->pos();
 
     if (mouseEvent->buttons() == Qt::LeftButton)
     {
-        if(m_SelectedLine)
+        if (m_SelectedLine)
         {
             m_SelectedLine->move(m_LastMousePosition, mouseEvent->pos());
         }
-        if(m_NewLine)
+
+        if (m_NewLine)
         {
             m_NewLine->setP2(mouseEvent->pos());
         }
+
         update();
     }
+
     m_LastMousePosition = mouseEvent->pos();
 }
 
@@ -92,7 +178,7 @@ void InteractionCanvas::mousePressEvent(QMouseEvent *mouseEvent)
 
     if (mouseEvent->button() == Qt::LeftButton)
     {
-        if(!m_SelectedLine)
+        if (!m_SelectedLine)
         {
             m_MousePressPoint = mouseEvent->pos();
             m_LastMousePosition = m_MousePressPoint;
@@ -105,14 +191,16 @@ void InteractionCanvas::mousePressEvent(QMouseEvent *mouseEvent)
     if (mouseEvent->button() ==  Qt::RightButton)
     {
         changeSelectedLine(NULL);
-        for(int i = 0; i < m_Lines.size() && !m_SelectedLine; i++)
+
+        for (int i = 0; i < m_Lines.size() && !m_SelectedLine; i++)
         {
-            if(m_Lines[i]->isHit(mouseEvent->pos()))
+            if (m_Lines[i]->isHit(mouseEvent->pos()))
             {
                 changeSelectedLine(m_Lines[i]);
             }
         }
     }
+
     update();
 }
 
@@ -122,7 +210,7 @@ void InteractionCanvas::mouseReleaseEvent(QMouseEvent *mouseEvent)
 
     if (mouseEvent->button() == Qt::LeftButton)
     {
-        if(m_NewLine)
+        if (m_NewLine)
         {
             m_MouseReleasePoint = mouseEvent->pos();
             m_NewLine->setP2(m_MouseReleasePoint);
@@ -140,12 +228,14 @@ void InteractionCanvas::keyPressEvent(QKeyEvent *keyEvent)
     qDebug() << "InteractionCanvas: Key: pressed:" << keyEvent->key() << "(" <<
              keyEvent->text() << ")" << (keyEvent->isAutoRepeat() ? "druck" : "");
 
-    if(!m_Lines.isEmpty() && keyEvent->key() == Qt::Key_Z && keyEvent->modifiers() == Qt::ControlModifier)
+    if (!m_Lines.isEmpty() && keyEvent->key() == Qt::Key_Z &&
+        keyEvent->modifiers() == Qt::ControlModifier)
     {
-        if(m_SelectedLine == m_Lines.last())
+        if (m_SelectedLine == m_Lines.last())
         {
             m_SelectedLine = NULL;
         }
+
         delete m_Lines.last();
         m_Lines.removeLast();
         update();
@@ -155,7 +245,7 @@ void InteractionCanvas::keyPressEvent(QKeyEvent *keyEvent)
 void InteractionCanvas::keyReleaseEvent(QKeyEvent *keyEvent)
 {
     qDebug() << "InteractionCanvas: Key: released:" << keyEvent->key() << "(" <<
-                keyEvent->text() << ")" << (keyEvent->isAutoRepeat() ? "druck" : "");
+             keyEvent->text() << ")" << (keyEvent->isAutoRepeat() ? "druck" : "");
 }
 
 /**
@@ -165,12 +255,13 @@ void InteractionCanvas::keyReleaseEvent(QKeyEvent *keyEvent)
  */
 void InteractionCanvas::changeSelectedLine(Line *newSelectedLine)
 {
-    if(m_SelectedLine)
+    if (m_SelectedLine)
     {
         m_SelectedLine->setSelected(false);
         m_SelectedLine = NULL;
     }
-    if(newSelectedLine)
+
+    if (newSelectedLine)
     {
         m_SelectedLine = newSelectedLine;
         m_SelectedLine->setSelected(true);
@@ -185,7 +276,7 @@ void InteractionCanvas::addNewLine(Line *newLine)
         m_NewLine = NULL;
     }
 
-    if(newLine)
+    if (newLine)
     {
         m_NewLine = new Line();
     }