zoomedit: Man kann R?ume hinzuf?gen, yeah!

9 files changed, 395 insertions, 142 deletions

diff --git a/draw.c b/draw.c
index 7ce0d7f..cb25a1e 100644
--- a/draw.c
+++ b/draw.c
@@ -31,30 +31,34 @@ static void drawGrid(cairo_t *cr, const RECTANGLE *rect) {
       cairo_move_to(cr, d, rect->y);
       cairo_line_to(cr, d, rect->y+rect->height);
       
-      if(step > 0.5)
-        string = g_strdup_printf("%i", (int)rint(d));
-      else
-        string = g_strdup_printf("%.*f", -(int)floor(log10(step*1.1)), d+step/10);
-      
-      cairo_move_to(cr, d+1/scale, rect->y+11/scale);
-      cairo_show_text(cr, string);
-      
-      g_free(string);
+      if(step > 0.005) {
+        if(step > 0.5)
+          string = g_strdup_printf("%i", (int)d);
+        else
+          string = g_strdup_printf("%.*f", -(int)floor(log10(step*1.1)), d+step/10);
+        
+        cairo_move_to(cr, d+1/scale, rect->y+11/scale);
+        cairo_show_text(cr, string);
+        
+        g_free(string);
+      }
     }
     
     for(d = rect->y - fmod(rect->y, step) - step; d <= rect->y+rect->height; d+=step) {
       cairo_move_to(cr, rect->x, d);
       cairo_line_to(cr, rect->x+rect->width, d);
       
-      if(step > 0.5)
-        string = g_strdup_printf("%i", (int)rint(d));
-      else
-        string = g_strdup_printf("%.*f", -(int)floor(log10(step*1.1)), d+step/10);
-      
-      cairo_move_to(cr, rect->x+3/scale, d+11/scale);
-      cairo_show_text(cr, string);
-      
-      g_free(string);
+      if(step > 0.005) {
+        if(step > 0.5)
+          string = g_strdup_printf("%i", (int)d);
+        else
+          string = g_strdup_printf("%.*f", -(int)floor(log10(step*1.1)), d+step/10);
+        
+        cairo_move_to(cr, rect->x+3/scale, d+11/scale);
+        cairo_show_text(cr, string);
+        
+        g_free(string);
+      }
     }
     
     cairo_stroke(cr);
@@ -63,7 +67,7 @@ static void drawGrid(cairo_t *cr, const RECTANGLE *rect) {
   }
 }
 
-static void polygon2path(cairo_t *cr, const POLYGON *polygon, const RECTANGLE *rect) {
+static void polygon2path(cairo_t *cr, const POLYGON *polygon, const RECTANGLE *rect, gboolean close) {
   int i;
   POLYGON polygon2 = {0, NULL};
   
@@ -83,7 +87,8 @@ static void polygon2path(cairo_t *cr, const POLYGON *polygon, const RECTANGLE *r
     cairo_line_to(cr, polygon2.vertices[i].x, polygon2.vertices[i].y);
   }
   
-  cairo_close_path(cr);
+  if(close)
+    cairo_close_path(cr);
   
   if(rect && polygon2.vertices)
     free(polygon2.vertices);
@@ -93,9 +98,11 @@ gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
   cairo_t *cr;
   VERTEX v1 = {-1, -1}, v2 = {widget->allocation.width+1, widget->allocation.height+1};
   RECTANGLE rect;
+  gboolean vertexOk;
   static GdkPixmap *pixmap = NULL;
   static double lastImageWidth = 0.0, lastImageHeight = 0.0;
   static gint lastWidth = 0.0, lastHeight = 0.0;
+  static int lastEditMode = 0;
   int i;
   
   
@@ -109,8 +116,8 @@ gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
   rect.width = v2.x-v1.x;
   rect.height = v2.y-v1.y;
   
-  if(pixmap == NULL || lastImageWidth != getImageWidth() || lastImageHeight != getImageHeight() ||
-     lastWidth != widget->allocation.width || lastHeight != widget->allocation.height || repaint) 
+  if(pixmap == NULL || fabs(lastImageWidth - getImageWidth()) >= 0.000001 || fabs(lastImageHeight - getImageHeight()) >= 0.000001 ||
+     lastWidth != widget->allocation.width || lastHeight != widget->allocation.height || lastEditMode != getEditMode() || repaint) 
   {
     if(pixmap != NULL)
       g_object_unref(G_OBJECT(pixmap));
@@ -121,15 +128,17 @@ gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
     lastImageHeight = getImageHeight();
     lastWidth = widget->allocation.width;
     lastHeight = widget->allocation.height;
+    lastEditMode = getEditMode();
     repaint = FALSE;
     
+    
     cr = gdk_cairo_create(GDK_DRAWABLE(pixmap));
     
     cairo_translate(cr, getImageWidth()/2-xTranslate, getImageHeight()/2-yTranslate);
     cairo_scale(cr, scale, scale);
     
     cairo_set_line_width(cr, 1.0/scale);
-    cairo_set_line_join(cr, CAIRO_LINE_JOIN_MITER);
+    cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
     
     cairo_set_source_rgb(cr, 0, 0, 0);
     cairo_paint(cr);
@@ -138,7 +147,7 @@ gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
     
     for(i = 0; i < getLevel()->nRooms; i++) {
       if(&getLevel()->rooms[i] != getActiveRoom())
-        polygon2path(cr, &getLevel()->rooms[i].polygon, &rect);
+        polygon2path(cr, &getLevel()->rooms[i].polygon, &rect, TRUE);
     }
     
     cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.3);
@@ -148,13 +157,14 @@ gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
     cairo_stroke(cr);
     
     if(getEditMode() == EDIT_MODE_SELECTED) {
-      polygon2path(cr, &getActiveRoom()->polygon, &rect);
+      polygon2path(cr, &getActiveRoom()->polygon, &rect, TRUE);
       
       cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.2);
       cairo_fill_preserve(cr);
     
       cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.9);
       cairo_set_line_width(cr, 2.0/scale);
+      cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
       cairo_stroke(cr);
     }
     
@@ -163,25 +173,58 @@ gboolean drawTopView(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
   
   gdk_draw_drawable(GDK_DRAWABLE(widget->window), widget->style->fg_gc[GTK_WIDGET_STATE(widget)], GDK_DRAWABLE(pixmap), 0, 0, 0, 0, -1, -1);
   
+  cr = gdk_cairo_create(GDK_DRAWABLE(widget->window));
+  
+  cairo_translate(cr, getImageWidth()/2-xTranslate, getImageHeight()/2-yTranslate);
+  cairo_scale(cr, scale, scale);
+  
+  cairo_set_line_width(cr, 2.0/scale);
+  cairo_set_line_join(cr, CAIRO_LINE_JOIN_MITER);
+  
   if(getHoveredRoom() != NULL && getHoveredRoom() != getActiveRoom() &&
     (getEditMode() == EDIT_MODE_VIEW || getEditMode() == EDIT_MODE_SELECTED))
   {
-    cr = gdk_cairo_create(GDK_DRAWABLE(widget->window));
+    polygon2path(cr, &getHoveredRoom()->polygon, &rect, TRUE);
     
-    cairo_translate(cr, getImageWidth()/2-xTranslate, getImageHeight()/2-yTranslate);
-    cairo_scale(cr, scale, scale);
+    cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.7);
+    cairo_stroke(cr);
+  }
+  else if(getEditMode() == EDIT_MODE_ADD) {
+    polygon2path(cr, &getActiveRoom()->polygon, NULL, FALSE);
     
-    cairo_set_line_width(cr, 2.0/scale);
-    cairo_set_line_join(cr, CAIRO_LINE_JOIN_MITER);
+    if(isPolygonOk(&getActiveRoom()->polygon))
+      cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.2);
+    else
+      cairo_set_source_rgba(cr, 1.0, 0.3, 0.3, 0.2);
+    cairo_fill_preserve(cr);
     
-    polygon2path(cr, &getHoveredRoom()->polygon, &rect);
     
+    if(getActiveRoom()->polygon.nVertices && getHoveredVertex()) {
+      vertexOk = isVertexOk(getHoveredVertex());
+      
+      if(vertexOk)
+        cairo_line_to(cr, getHoveredVertex()->x, getHoveredVertex()->y);
+    }
+    
+    cairo_set_line_width(cr, 2.0/scale);
+    cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
+    cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
     cairo_set_source_rgba(cr, 0.0, 0.7, 1.0, 0.7);
     cairo_stroke(cr);
     
-    cairo_destroy (cr);
+    if(getActiveRoom()->polygon.nVertices && getHoveredVertex() && !vertexOk) {
+      cairo_set_source_rgba(cr, 1.0, 0.3, 0.3, 0.7);
+      
+      i = getActiveRoom()->polygon.nVertices - 1;
+      cairo_move_to(cr, getActiveRoom()->polygon.vertices[i].x, getActiveRoom()->polygon.vertices[i].y);
+      cairo_line_to(cr, getHoveredVertex()->x, getHoveredVertex()->y);
+      
+      cairo_stroke(cr);
+    }
   }
   
+  cairo_destroy (cr);
+  
   return FALSE;
 }
 
@@ -191,7 +234,7 @@ double getScale() {
 }
 
 void setScale(double s) {
-  scale = s;
+  scale = MAX(0.005, MIN(s, 10000));
   repaint = TRUE;
 }
 
diff --git a/edit.c b/edit.c
index bb20d89..0fc01aa 100644
--- a/edit.c
+++ b/edit.c
@@ -1,4 +1,7 @@
 #include "edit.h"
+#include "level.h"
+#include "geometry.h"
+#include <stdlib.h>
 
 
 static int editMode = EDIT_MODE_VIEW;
@@ -6,6 +9,8 @@ static int editMode = EDIT_MODE_VIEW;
 static ROOM *activeRoom = NULL;
 static ROOM *hoveredRoom = NULL;
 
+static VERTEX hoveredVertex;
+static int hasHoveredVertex = 0;
 
 int getEditMode() {
   return editMode;
@@ -18,14 +23,150 @@ ROOM *getActiveRoom() {
 void setActiveRoom(ROOM *room) {
   activeRoom = room;
   
-  if(editMode == EDIT_MODE_VIEW || editMode == EDIT_MODE_SELECTED)
-    editMode = (room == NULL) ? EDIT_MODE_VIEW : EDIT_MODE_SELECTED;
+  if(room == NULL) {
+    editMode = EDIT_MODE_VIEW;
+  }
+  else if(editMode == EDIT_MODE_VIEW) {
+    editMode = EDIT_MODE_SELECTED;
+  }
+}
+
+VERTEX *getHoveredVertex() {
+  if(hasHoveredVertex) return &hoveredVertex;
+  else return NULL;
+}
+
+void setHoveredVertex(VERTEX *v) {
+  int i;
+  LEVEL *l;
+  
+  if(v) {
+    hasHoveredVertex = 1;
+    hoveredVertex = *v;
+    
+    l = getLevel();
+    hoveredRoom = NULL;
+    
+    for(i = 0; i < l->nRooms; i++) {
+      if(vertexInPolygon(v, &l->rooms[i].polygon)) {
+        hoveredRoom = &l->rooms[i];
+        break;
+      }
+    }
+  }
+  else {
+    hasHoveredVertex = 0;
+    hoveredRoom = NULL;
+  }
+}
+
+void startAddMode() {
+  ROOM room = {{0, NULL}, calloc(1, sizeof(unsigned char))};
+  
+  activeRoom = calloc(1, sizeof(ROOM));
+  activeRoom->polygon.nVertices = 0;
+  activeRoom->polygon.vertices = NULL;
+  activeRoom->name = calloc(1, sizeof(unsigned char));
+  
+  editMode = EDIT_MODE_ADD;
+}
+
+void endAddMode() {
+  editMode = activeRoom ? EDIT_MODE_SELECTED : EDIT_MODE_VIEW;
 }
 
 ROOM *getHoveredRoom() {
   return hoveredRoom;
 }
 
-void setHoveredRoom(ROOM *room) {
-  hoveredRoom = room;
+static isLineOk(LINE *l) {
+  LEVEL *lvl = getLevel();
+  LINE l2;
+  int i;
+  
+  
+  if(activeRoom) {
+    for(i = 0; i+2 < activeRoom->polygon.nVertices; i++) {
+      l2.v1 = activeRoom->polygon.vertices[i];
+      l2.v2 = activeRoom->polygon.vertices[i+1];
+      
+      if(lineIntersection(l, &l2, NULL) == INTERSECTION_SEGMENT_SEGMENT) return 0;
+    }
+    
+    if(activeRoom->polygon.nVertices > 1) {
+      l2.v1 = activeRoom->polygon.vertices[activeRoom->polygon.nVertices-2];
+      l2.v2 = activeRoom->polygon.vertices[activeRoom->polygon.nVertices-1];
+      if(vertexOnLine(&l->v2, &l2)) return 0;
+    }
+  }
+  
+  for(i = 0; i < lvl->nRooms; i++) {
+    if(linePolygonIntersection(l, &lvl->rooms[i].polygon))
+      return 0;
+  }
+  
+  return 1;
+}
+
+int isVertexOk(VERTEX *v) {
+  LEVEL *lvl = getLevel();
+  LINE l;
+  int i;
+  
+  for(i = 0; i < lvl->nRooms; i++) {
+    if(vertexInPolygon(v, &lvl->rooms[i].polygon)) return 0;
+  }
+  
+  if(!(getActiveRoom() && getActiveRoom()->polygon.nVertices))
+    return 1;
+  
+  l.v1 = getActiveRoom()->polygon.vertices[getActiveRoom()->polygon.nVertices-1];
+  l.v2 = *v;
+    
+  return isLineOk(&l);
+}
+
+
+
+int isPolygonOk(POLYGON *polygon) {
+  LEVEL *lvl = getLevel();
+  LINE l, l2;
+  int i, j;
+  
+  if(!polygon->nVertices) return 0;
+  
+  for(i = 0; i < lvl->nRooms; i++) {
+    if(!lvl->rooms[i].polygon.nVertices) continue;
+    
+    if(vertexInPolygon(&polygon->vertices[0], &lvl->rooms[i].polygon))
+      return 0;
+    
+    if(vertexInPolygon(&lvl->rooms[i].polygon.vertices[0], polygon))
+      return 0;
+  }
+  
+  if(polygon->nVertices == 1)
+    return 1;
+  
+  for(i = 0; i < polygon->nVertices; i++) {
+    l.v1 = polygon->vertices[i];
+    l.v2 = polygon->vertices[(i+1)%polygon->nVertices];
+    
+    for(j = 0; j < lvl->nRooms; j++) {
+      if(linePolygonIntersection(&l, &lvl->rooms[j].polygon))
+        return 0;
+    }
+    
+    for(j = i+2; j < polygon->nVertices; j++) {
+      if(i == 0 && j == polygon->nVertices-1) continue;
+      
+      l2.v1 = polygon->vertices[j];
+      l2.v2 = polygon->vertices[(j+1)%polygon->nVertices];
+      
+      if(lineIntersection(&l, &l2, NULL) == INTERSECTION_SEGMENT_SEGMENT)
+        return 0;
+    }
+  }
+  
+  return 1;
 }
diff --git a/edit.h b/edit.h
index d3ce2f6..663ba45 100644
--- a/edit.h
+++ b/edit.h
@@ -2,6 +2,7 @@
 #define EDIT_H_
 
 #include "level.h"
+#include "geometry.h"
 
 #define EDIT_MODE_VIEW     0
 #define EDIT_MODE_SELECTED 1
@@ -13,6 +14,11 @@ ROOM *getActiveRoom();
 void setActiveRoom(ROOM *room);
 
 ROOM *getHoveredRoom();
-void setHoveredRoom(ROOM *room);
+
+VERTEX *getHoveredVertex();
+void setHoveredVertex(VERTEX *v);
+
+int isVertexOk(VERTEX *v);
+int isPolygonOk(POLYGON *polygon);
 
 #endif /*EDIT_H_*/
diff --git a/geometry.c b/geometry.c
index 248f354..2bbd6aa 100644
--- a/geometry.c
+++ b/geometry.c
@@ -4,13 +4,13 @@
 #include <gtk/gtk.h>
 
 
-void addVertex(VERTEX_LIST *list, VERTEX *v) {
+void addVertex(VERTEX_LIST *list, const VERTEX *v) {
   list->nVertices++;
   list->vertices = realloc(list->vertices, list->nVertices*sizeof(VERTEX));
   list->vertices[list->nVertices-1] = *v;
 }
 
-void insertVertex(VERTEX_LIST *list, VERTEX *v, unsigned int n) {
+void insertVertex(VERTEX_LIST *list, const VERTEX *v, unsigned int n) {
   int i;
   
   if(n > list->nVertices)
@@ -44,6 +44,27 @@ double vertexDistance(const VERTEX *v1, const VERTEX *v2) {
   return sqrt(vertexDistanceSquare(v1, v2));
 }
 
+int vertexOnLine(const VERTEX *v, const LINE *l) {
+  if(l->v1.x == l->v2.x && l->v1.y == l->v2.y) {
+    if(l->v1.x == v->x && l->v1.y == v->y) return 1;
+    else return 0;
+  }
+  
+  if(l->v1.x == l->v2.x) {
+    if(l->v1.x != v->x) return 0;
+    else if(v->y >= MIN(l->v1.y, l->v2.y) && v->y <= MAX(l->v1.y, l->v2.y)) return 1;
+    else return 1;
+  }
+  
+  if(l->v1.y == l->v2.y) {
+    if(l->v1.y != v->y) return 0;
+    else if(v->x >= MIN(l->v1.x, l->v2.x) && v->x <= MAX(l->v1.x, l->v2.x)) return 1;
+    else return 1;
+  }
+  if((v->x-l->v1.x)/(l->v2.x-l->v1.x) - (v->y-l->v1.y)/(l->v2.y-l->v1.y) == 0) return 1;
+  else return 0;
+}
+
 int vertexInRect(const VERTEX *v, const RECTANGLE *rect) {
   int ret = EDGE_NONE;
   
@@ -149,7 +170,7 @@ double polygonArea(const POLYGON *p) {
   for(i = 0; i < p->nVertices; i++)
     d += (p->vertices[(i+1)%p->nVertices].x+p->vertices[i].x)*(p->vertices[(i+1)%p->nVertices].y-p->vertices[i].y);
   
-  return d/2;
+  return fabs(d/2);
 }
 
 int lineIntersection(const LINE *la, const LINE *lb, VERTEX *v) {
@@ -176,22 +197,25 @@ int lineIntersection(const LINE *la, const LINE *lb, VERTEX *v) {
     switched = 1;
   }
   
-  double ma = (ya2-ya1)/(xa2-xa1);
-  double mb = (yb2-yb1)/(xb2-xb1);
-  double ba = ya1 - ma*xa1;
-  double bb = yb1 - mb*xb1;
-  
-  if(ma == mb) return (ba == bb) ? INTERSECTION_IDENTICAL : INTERSECTION_NONE; 
+  if(xa1 == xa2 && xb1 == xb2)
+    return (xa1 == xb1) ? INTERSECTION_IDENTICAL : INTERSECTION_NONE;
   
-  if(isinf(ma)) {
+  if(xa1 == xa2) {
     v->x = xa1;
     v->y = yb1;
   }
-  else if(isinf(mb)) {
+  else if(xb1 == xb2) {
     v->x = xb1;
     v->y = ya1;
   }
   else {
+    double ma = (ya2-ya1)/(xa2-xa1);
+    double mb = (yb2-yb1)/(xb2-xb1);
+    double ba = ya1 - ma*xa1;
+    double bb = yb1 - mb*xb1;
+    
+    if(ma == mb) return (ba == bb) ? INTERSECTION_IDENTICAL : INTERSECTION_NONE;
+    
     v->x = (bb-ba)/(ma-mb);
     v->y = ma*v->x + ba;
   }
diff --git a/geometry.h b/geometry.h
index c32b3ea..a272b2c 100644
--- a/geometry.h
+++ b/geometry.h
@@ -39,13 +39,14 @@ typedef struct _VERTEX_LIST {
 } VERTEX_LIST, POLYGON;
 
 
-void addVertex(VERTEX_LIST *list, VERTEX *v);
-void insertVertex(VERTEX_LIST *list, VERTEX *v, unsigned int n);
+void addVertex(VERTEX_LIST *list, const VERTEX *v);
+void insertVertex(VERTEX_LIST *list, const VERTEX *v, unsigned int n);
 void deleteVertex(VERTEX_LIST *list, unsigned int n);
 
 double vertexDistanceSquare(const VERTEX *v1, const VERTEX *v2);
 double vertexDistance(const VERTEX *v1, const VERTEX *v2);
 
+int vertexOnLine(const VERTEX *v, const LINE *l);
 int vertexInRect(const VERTEX *v, const RECTANGLE *rect);
 gboolean vertexInPolygon(const VERTEX *v, const POLYGON *p);
 
diff --git a/level.c b/level.c
index 7c6aaa9..e78dfb7 100644
--- a/level.c
+++ b/level.c
@@ -13,7 +13,7 @@ void setLevel(LEVEL *l) {
   level = l;
 }
 
-void addRoom(LEVEL *lvl, ROOM *room) {
+void addRoom(LEVEL *lvl, const ROOM *room) {
   lvl->nRooms++;
   lvl->rooms = realloc(lvl->rooms, lvl->nRooms*sizeof(ROOM));
   lvl->rooms[lvl->nRooms-1] = *room;
diff --git a/level.h b/level.h
index aa51ea1..e647509 100644
--- a/level.h
+++ b/level.h
@@ -17,7 +17,7 @@ typedef struct _LEVEL {
 LEVEL *getLevel();
 void setLevel(LEVEL *l);
 
-void addRoom(LEVEL *lvl, ROOM *room);
+void addRoom(LEVEL *lvl, const ROOM *room);
 void deleteRoom(LEVEL *lvl, unsigned int n);
 
 void freeLevel(LEVEL *lvl);
diff --git a/window.c b/window.c
index d0cb531..38cf0cc 100644
--- a/window.c
+++ b/window.c
@@ -8,10 +8,10 @@
 #include <string.h>
 
 
-static GtkWidget *drawingArea = NULL, *sidebar = NULL;
+static GtkWidget *drawingArea = NULL, *sidebarView = NULL, *sidebarAdd = NULL;
 static GtkAdjustment *hAdjustment = NULL, *vAdjustment = NULL;
 
-static GtkWidget *entryName, *labelArea = NULL, *labelPerimeter = NULL;
+static GtkWidget *entryName, *labelArea = NULL, *labelPerimeter = NULL, *buttonAdd = NULL, *buttonAddDo = NULL;
 
 
 static gboolean deleteEvent(GtkWidget *widget, GdkEvent  *event, gpointer data) {
@@ -32,27 +32,30 @@ static gboolean scrollEvent(GtkWidget *widget, GdkEventScroll *event, gpointer u
 
 static gboolean buttonEvent(GtkWidget *widget, GdkEventButton *event, gpointer user_data) {
   VERTEX v = {event->x, event->y};
-  int i;
   
   switch(event->type) {
     case GDK_BUTTON_PRESS:
       switch(event->button) {
         case 1:
-          viewToImage(&v);
-          
-          setActiveRoom(NULL);
-          
-          for(i = 0; i < getLevel()->nRooms; i++) {
-            if(vertexInPolygon(&v, &getLevel()->rooms[i].polygon)) {
-              setActiveRoom(&getLevel()->rooms[i]);
+          switch(getEditMode()) {
+            case EDIT_MODE_VIEW:
+            case EDIT_MODE_SELECTED:
+              setActiveRoom(getHoveredRoom());
+              
+              updateSidebar();
+              
+              redraw();
               
               break;
-            }
+            case EDIT_MODE_ADD:
+              viewToImage(&v);
+              
+              if(isVertexOk(&v)) {
+                addVertex(&getActiveRoom()->polygon, &v);
+                updateSidebar();
+              }
           }
           
-          updateSidebar();
-          
-          redraw();
           gtk_widget_queue_draw(drawingArea);
       }
   }
@@ -61,64 +64,40 @@ static gboolean buttonEvent(GtkWidget *widget, GdkEventButton *event, gpointer u
 }
 
 gboolean crossingNotifyEvent(GtkWidget *widget, GdkEventCrossing *event, gpointer user_data) {
-  int i;
   VERTEX v;
   
   
-  setHoveredRoom(NULL);
-  
-  if(event->type == GDK_ENTER_NOTIFY) {
-    v.x = event->x;
-    v.y = event->y;
-    
-    viewToImage(&v);
-  
+  switch(event->type) {
+    case GDK_ENTER_NOTIFY:
+      v.x = event->x;
+      v.y = event->y;
+      
+      viewToImage(&v);
     
-    for(i = 0; i < getLevel()->nRooms; i++) {
-      if(vertexInPolygon(&v, &getLevel()->rooms[i].polygon)) {
-        setHoveredRoom(&getLevel()->rooms[i]);
-        
-        break;
-      }
-    }
+      setHoveredVertex(&v);
+      
+      break;
+    case GDK_LEAVE_NOTIFY:
+      setHoveredVertex(NULL);
   }
   
+  
   gtk_widget_queue_draw(drawingArea);
 }
 
 gboolean motionNotifyEvent(GtkWidget *widget, GdkEventMotion *event, gpointer user_data) {
-  int i;
-  static VERTEX v, v_last = {0, 0};
-  LINE line;
-  gboolean changed = FALSE;
+  VERTEX v;
+  ROOM *last = getHoveredRoom();
   
   v.x = event->x;
   v.y = event->y;
   
   viewToImage(&v);
   
-  line.v1 = v_last;
-  line.v2 = v;
+  setHoveredVertex(&v);
   
-  for(i = 0; i < getLevel()->nRooms; i++) {
-    if(linePolygonIntersection(&line, &getLevel()->rooms[i].polygon)) {
-      if(vertexInPolygon(&v, &getLevel()->rooms[i].polygon)) {
-        setHoveredRoom(&getLevel()->rooms[i]);
-        changed = TRUE;
-        
-        break;
-      }
-      else {
-        setHoveredRoom(NULL);
-        changed = TRUE;
-      }
-    }
-  }
-  
-  if(changed)
+  if(getHoveredRoom() != last || getEditMode() == EDIT_MODE_ADD)
     gtk_widget_queue_draw(drawingArea);
-  
-  v_last = v;
 }
 
 static void destroy(GtkWidget *widget, gpointer data) {
@@ -182,31 +161,56 @@ static void sidebarNameChanged(GtkEditable *editable, gpointer user_data) {
   getActiveRoom()->name = strdup(gtk_entry_get_text(GTK_ENTRY(entryName)));
 }
 
+static void sidebarButtonClicked(GtkButton *button, gpointer user_data) {
+  if(button == GTK_BUTTON(buttonAdd)) {
+    startAddMode();
+    updateSidebar();
+    
+    gtk_widget_queue_draw(drawingArea);
+  }
+  else if(button == GTK_BUTTON(buttonAddDo)) {
+    if(getActiveRoom() &&getActiveRoom()->polygon.nVertices > 2 && isPolygonOk(&getActiveRoom()->polygon)) {
+      addRoom(getLevel(), getActiveRoom());
+      setActiveRoom(&getLevel()->rooms[getLevel()->nRooms-1]);
+    }
+    
+    endAddMode();
+    updateSidebar();
+    
+    gtk_widget_queue_draw(drawingArea);
+  }
+}
+
 static GtkWidget* createSidebar() {
-  GtkWidget *widget, *labelRoomInfo, *labelName, *tableRoomData, *labelAreaLabel, *labelPerimeterLabel;
+  GtkWidget *sidebar, *labelRoomInfo, *labelName;
+  GtkWidget *tableRoomData, *labelAreaLabel, *labelPerimeterLabel;
   
-  widget = gtk_vbox_new(FALSE, 0);
+  sidebar = gtk_hbox_new(FALSE, 0);
+  
+  // View sidebar
+  sidebarView = gtk_vbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(sidebar), sidebarView, FALSE, FALSE, 5);
   
   labelRoomInfo = gtk_label_new(NULL);
   gtk_label_set_markup(GTK_LABEL(labelRoomInfo), "<b>Room info:</b>");
   gtk_misc_set_alignment(GTK_MISC(labelRoomInfo), 0.0, 0.5);
-  gtk_box_pack_start(GTK_BOX(widget), labelRoomInfo, FALSE, FALSE, 5);
+  gtk_box_pack_start(GTK_BOX(sidebarView), labelRoomInfo, FALSE, FALSE, 5);
   
-  gtk_box_pack_start(GTK_BOX(widget), gtk_hseparator_new(), FALSE, FALSE, 5);
+  gtk_box_pack_start(GTK_BOX(sidebarView), gtk_hseparator_new(), FALSE, FALSE, 5);
   
   labelName = gtk_label_new("Name:");
   gtk_misc_set_alignment(GTK_MISC(labelName), 0.0, 0.5);
-  gtk_box_pack_start(GTK_BOX(widget), labelName, FALSE, FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(sidebarView), labelName, FALSE, FALSE, 0);
   
   entryName = gtk_entry_new();
   gtk_widget_set_sensitive(entryName, FALSE);
   g_signal_connect(G_OBJECT(entryName), "changed", G_CALLBACK(sidebarNameChanged), NULL);
-  gtk_box_pack_start(GTK_BOX(widget), entryName, FALSE, FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(sidebarView), entryName, FALSE, FALSE, 0);
       
   tableRoomData = gtk_table_new(2, 2, FALSE);
   gtk_table_set_row_spacings(GTK_TABLE(tableRoomData), 5);
   gtk_table_set_col_spacings(GTK_TABLE(tableRoomData), 10);
-  gtk_box_pack_start(GTK_BOX(widget), tableRoomData, FALSE, FALSE, 5);
+  gtk_box_pack_start(GTK_BOX(sidebarView), tableRoomData, FALSE, FALSE, 5);
   
   labelAreaLabel = gtk_label_new("Room area:");
   gtk_misc_set_alignment(GTK_MISC(labelAreaLabel), 0.0, 0.5);
@@ -224,11 +228,28 @@ static GtkWidget* createSidebar() {
   gtk_misc_set_alignment(GTK_MISC(labelPerimeter), 1.0, 0.5);
   gtk_table_attach_defaults(GTK_TABLE(tableRoomData), labelPerimeter, 1, 2, 1, 2);
   
-  return widget;
+  buttonAdd = gtk_button_new_with_label("Add room");
+  g_signal_connect(G_OBJECT(buttonAdd), "clicked", G_CALLBACK(sidebarButtonClicked), NULL);
+  gtk_box_pack_end(GTK_BOX(sidebarView), buttonAdd, FALSE, FALSE, 0);
+  
+  // Add sidebar
+  sidebarAdd = gtk_vbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(sidebar), sidebarAdd, FALSE, FALSE, 5);
+  
+  labelRoomInfo = gtk_label_new(NULL);
+  gtk_label_set_markup(GTK_LABEL(labelRoomInfo), "<b>Add room</b>");
+  gtk_misc_set_alignment(GTK_MISC(labelRoomInfo), 0.0, 0.5);
+  gtk_box_pack_start(GTK_BOX(sidebarAdd), labelRoomInfo, FALSE, FALSE, 5);
+  
+  buttonAddDo = gtk_button_new_with_label("Add room");
+  g_signal_connect(G_OBJECT(buttonAddDo), "clicked", G_CALLBACK(sidebarButtonClicked), NULL);
+  gtk_box_pack_end(GTK_BOX(sidebarAdd), buttonAddDo, FALSE, FALSE, 0);
+  
+  return sidebar;
 }
 
 GtkWidget* createMainWindow() {
-  GtkWidget *window, *vbox, *hPaned, *table, *vScroll, *hScroll;
+  GtkWidget *window, *hPaned, *vbox, *table, *vScroll, *hScroll, *sidebar;
   GdkColor color = {0, 0, 0, 0};
   
   
@@ -262,7 +283,6 @@ GtkWidget* createMainWindow() {
   g_signal_connect(G_OBJECT(drawingArea), "motion-notify-event", G_CALLBACK(motionNotifyEvent), NULL);
   g_signal_connect(G_OBJECT(drawingArea), "scroll-event", G_CALLBACK(scrollEvent), NULL);
   gtk_widget_add_events(drawingArea, GDK_SCROLL_MASK | GDK_POINTER_MOTION_MASK | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);
-  gtk_widget_set_double_buffered(drawingArea, FALSE);
   gtk_table_attach(GTK_TABLE(table), drawingArea, 0, 1, 0, 1, GTK_FILL|GTK_EXPAND|GTK_SHRINK, GTK_FILL|GTK_EXPAND|GTK_SHRINK, 0, 0);
   
   hAdjustment = GTK_ADJUSTMENT(gtk_adjustment_new(0, 0, 0, 10, 100, 100));
@@ -279,6 +299,7 @@ GtkWidget* createMainWindow() {
   gtk_paned_pack2(GTK_PANED(hPaned), sidebar, FALSE, TRUE);
   
   gtk_widget_show_all(vbox);
+  gtk_widget_hide(sidebarAdd);
   
   return window;
 }
@@ -286,25 +307,43 @@ GtkWidget* createMainWindow() {
 void updateSidebar() {
   gchar *string;
   
-  
-  if(getActiveRoom()) {
-    gtk_entry_set_text(GTK_ENTRY(entryName), getActiveRoom()->name);
-    gtk_widget_set_sensitive(entryName, TRUE);
-    
-    string = g_strdup_printf("%.2f", polygonArea(&getActiveRoom()->polygon));
-    gtk_label_set_text(GTK_LABEL(labelArea), string);
-    g_free(string);
-    
-    string = g_strdup_printf("%.2f", polygonPerimeter(&getActiveRoom()->polygon));
-    gtk_label_set_text(GTK_LABEL(labelPerimeter), string);
-    g_free(string);
-  }
-  else {
-    gtk_entry_set_text(GTK_ENTRY(entryName), "");
-    gtk_widget_set_sensitive(entryName, FALSE);
-    
-    gtk_label_set_text(GTK_LABEL(labelArea), NULL);
-    gtk_label_set_text(GTK_LABEL(labelPerimeter), NULL);
+  switch(getEditMode()) {
+    case EDIT_MODE_VIEW:
+    case EDIT_MODE_SELECTED:
+      gtk_widget_hide(sidebarAdd);
+      gtk_widget_show(sidebarView);
+      
+      if(getActiveRoom()) {
+        gtk_entry_set_text(GTK_ENTRY(entryName), getActiveRoom()->name);
+        gtk_widget_set_sensitive(entryName, TRUE);
+        
+        string = g_strdup_printf("%.2f", polygonArea(&getActiveRoom()->polygon));
+        gtk_label_set_text(GTK_LABEL(labelArea), string);
+        g_free(string);
+        
+        string = g_strdup_printf("%.2f", polygonPerimeter(&getActiveRoom()->polygon));
+        gtk_label_set_text(GTK_LABEL(labelPerimeter), string);
+        g_free(string);
+      }
+      else {
+        gtk_entry_set_text(GTK_ENTRY(entryName), "");
+        gtk_widget_set_sensitive(entryName, FALSE);
+        
+        gtk_label_set_text(GTK_LABEL(labelArea), NULL);
+        gtk_label_set_text(GTK_LABEL(labelPerimeter), NULL);
+      }
+      
+      break;
+    case EDIT_MODE_ADD:
+      gtk_widget_hide(sidebarView);
+      gtk_widget_show(sidebarAdd);
+      
+      if(getActiveRoom()) {
+        if(getActiveRoom()->polygon.nVertices > 2 && isPolygonOk(&getActiveRoom()->polygon))
+          gtk_widget_set_sensitive(buttonAddDo, TRUE);
+        else
+          gtk_widget_set_sensitive(buttonAddDo, FALSE);
+      }
   }
 }
 
diff --git a/zoomedit.c b/zoomedit.c
index 0d90aa3..5cce048 100644
--- a/zoomedit.c
+++ b/zoomedit.c
@@ -5,22 +5,21 @@
 
 
 int main(int argc, char *argv[]) {
-  VERTEX vertices[4] = {{0,-1}, {1,0}, {0,1}, {-1,0}};
-  ROOM room = {{sizeof(vertices)/sizeof(vertices[0]), vertices}, calloc(1, sizeof(unsigned char))};
-  LEVEL lvl = {1, &room};
+  LEVEL *lvl = calloc(1, sizeof(LEVEL));
   GtkWidget *window;
   
+  
+  setLevel(lvl);
+  
   gtk_init(&argc, &argv);
   
   window = createMainWindow();
   
-  setLevel(&lvl);
-  
   gtk_widget_show(window);
   
   gtk_main();
   
-  free(room.name);
+  freeLevel(lvl);
   
   return 0;
 }