fixed cache issue

src/gui/UBCachePropertiesWidget.cpp

@@ -6,6 +6,7 @@
 #include "UBCachePropertiesWidget.h"
 
 #include "core/UBApplication.h"
+#include "core/UBApplicationController.h"
 #include "board/UBBoardController.h"
 #include "domain/UBGraphicsScene.h"
 
@@ -91,7 +92,7 @@ UBCachePropertiesWidget::UBCachePropertiesWidget(QWidget *parent, const char *na
     mpSizeLabel = new QLabel(tr("Size:"), mpProperties);
     mpSizeSlider = new QSlider(Qt::Horizontal, mpProperties);
     mpSizeSlider->setMinimumHeight(20);
-    mpSizeSlider->setMinimum(0);
+    mpSizeSlider->setMinimum(50);
     mpSizeSlider->setMaximum(MAX_SHAPE_WIDTH);
     mpSizeLayout->addWidget(mpSizeLabel, 0);
     mpSizeLayout->addWidget(mpSizeSlider, 1);
@@ -204,6 +205,8 @@ UBCachePropertiesWidget::~UBCachePropertiesWidget()
 
 void UBCachePropertiesWidget::onCloseClicked()
 {
+    if(!mCaches.empty())
+    {
         // Remove the current cache from the list
         mCaches.remove(mCaches.indexOf(mpCurrentCache));
 
@@ -215,6 +218,9 @@ void UBCachePropertiesWidget::onCloseClicked()
         {
             emit cacheListEmpty();
         }
+
+        emit hideTab(name());
+    }
 }
 
 void UBCachePropertiesWidget::updateCacheColor(QColor color)
@@ -269,6 +275,21 @@ void UBCachePropertiesWidget::updateShapeButtons()
 
 void UBCachePropertiesWidget::updateCurrentCache()
 {
+    bool isBoardMode = false;
+    // this widget can work only on Board mode
+    if( UBApplication::applicationController != NULL )
+    {
+        // if app controller is available, and current mode is Board, and no show desktop, than all ok, just process
+        if( UBApplication::applicationController->displayMode() == UBApplicationController::Board && 
+            !UBApplication::applicationController->isShowingDesktop())
+            isBoardMode = true;
+    }
+    // if app controller == null, than we do not know what mode now, so just process
+    else
+        isBoardMode = true;
+
+    if(isBoardMode)
+    {
         // Get the current page cache
         QList<QGraphicsItem*> items = UBApplication::boardController->activeScene()->items();
         foreach(QGraphicsItem* it, items)
@@ -301,8 +322,12 @@ void UBCachePropertiesWidget::updateCurrentCache()
                 return;
             }
         }
+    }
 
-    // If we fall here, that means that this page has no cache
+    // If we fall here, that means:
+    // 1 - that this page has no cache
+    // 2 - we are not in Board mode
+    // 3 - we are in Board mode, but show desktop (as really - Desktop mode)
     emit hideTab(name());
     mpCurrentCache = NULL;
     setDisabled(true);
@@ -320,3 +345,4 @@ void UBCachePropertiesWidget::onCacheEnabled()
 {
     emit showTab(name());
 }
+