# HG changeset patch
# User Hasan Yavuz ÖZDERYA <hy@ozderya.net>
# Date 2015-04-19 06:57:00
# Node ID e65811fa0522a54c9e15691a3a1febaed2f13bb4
# Parent  8932fd91959c5c93683751c03b9cffeb53926882

added number of channels selection

diff --git a/mainwindow.cpp b/mainwindow.cpp
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -72,6 +72,11 @@ MainWindow::MainWindow(QWidget *parent) 
     QObject::connect(ui->actionClear, SIGNAL(triggered(bool)),
                      this, SLOT(clearPlot()));
 
+    // setup number of channels spinbox
+    QObject::connect(ui->spNumOfChannels,
+                     SELECT<int>::OVERLOAD_OF(&QSpinBox::valueChanged),
+                     this, &MainWindow::onNumOfChannelsChanged);
+
     // setup number format buttons
     numberFormatButtons.addButton(ui->rbUint8,  NumberFormat_uint8);
     numberFormatButtons.addButton(ui->rbUint16, NumberFormat_uint16);
@@ -499,6 +504,35 @@ void MainWindow::onNumOfSamplesChanged(i
     }
 }
 
+void MainWindow::onNumOfChannelsChanged(int value)
+{
+    unsigned int oldNum = this->numOfChannels;
+    this->numOfChannels = value;
+
+    if (numOfChannels > oldNum)
+    {
+        // add new channels
+        for (int i = 0; i < numOfChannels - oldNum; i++)
+        {
+            channelsData.append(DataArray(numOfSamples, 0.0));
+            curves.append(new QwtPlotCurve());
+            curves.last()->setSamples(dataX, channelsData.last());
+            curves.last()->attach(ui->plot);
+        }
+    }
+    else if(numOfChannels < oldNum)
+    {
+        // remove channels
+        for (int i = 0; i < oldNum - numOfChannels; i++)
+        {
+            channelsData.removeLast();
+            auto curve = curves.takeLast();
+            curve->detach();
+            delete curve;
+        }
+    }
+}
+
 void MainWindow::onAutoScaleChecked(bool checked)
 {
     if (checked)
diff --git a/mainwindow.h b/mainwindow.h
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -107,6 +107,7 @@ private slots:
     void onAutoScaleChecked(bool checked);
     void onYScaleChanged();
 
+    void onNumOfChannelsChanged(int value);
     void onNumberFormatButtonToggled(int numberFormatId, bool checked);
     void selectNumberFormat(NumberFormat numberFormatId);
 
diff --git a/mainwindow.ui b/mainwindow.ui
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -344,6 +344,40 @@
        </attribute>
        <layout class="QHBoxLayout" name="horizontalLayout_5">
         <item>
+         <layout class="QFormLayout" name="formLayout_3">
+          <item row="0" column="0">
+           <widget class="QLabel" name="label_4">
+            <property name="text">
+             <string>Number Of Channels:</string>
+            </property>
+           </widget>
+          </item>
+          <item row="0" column="1">
+           <widget class="QSpinBox" name="spNumOfChannels">
+            <property name="minimumSize">
+             <size>
+              <width>60</width>
+              <height>0</height>
+             </size>
+            </property>
+            <property name="minimum">
+             <number>1</number>
+            </property>
+            <property name="maximum">
+             <number>32</number>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+        <item>
+         <widget class="Line" name="line_2">
+          <property name="orientation">
+           <enum>Qt::Vertical</enum>
+          </property>
+         </widget>
+        </item>
+        <item>
          <widget class="QGroupBox" name="groupBox">
           <property name="title">
            <string>Number Format:</string>
@@ -415,9 +449,12 @@
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
+          <property name="sizeType">
+           <enum>QSizePolicy::MinimumExpanding</enum>
+          </property>
           <property name="sizeHint" stdset="0">
            <size>
-            <width>445</width>
+            <width>20</width>
             <height>20</height>
            </size>
           </property>
@@ -557,7 +594,7 @@
      <x>0</x>
      <y>0</y>
      <width>653</width>
-     <height>20</height>
+     <height>23</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">