# HG changeset patch
# User Hasan Yavuz ÖZDERYA <hy@ozderya.net>
# Date 2015-03-08 17:15:46
# Node ID 90fb38350cfde10b665c9e3935732c5486a7e7d1
# Parent  799dda1bc58478eefddea6a7653850e7fbf09a75

implemented plot axis limit controls

diff --git a/mainwindow.cpp b/mainwindow.cpp
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -2,7 +2,8 @@
 #include "ui_mainwindow.h"
 #include <QSerialPortInfo>
 #include <QtDebug>
-
+#include <qwt_plot.h>
+#include <limits.h>
 #include "utils.h"
 
 MainWindow::MainWindow(QWidget *parent) :
@@ -35,6 +36,15 @@ MainWindow::MainWindow(QWidget *parent) 
     QObject::connect(ui->spNumOfSamples, SELECT<int>::OVERLOAD_OF(&QSpinBox::valueChanged),
                      this, &MainWindow::onNumOfSamplesChanged);
 
+    QObject::connect(ui->cbAutoScale, &QCheckBox::toggled,
+                     this, &MainWindow::onAutoScaleChecked);
+
+    QObject::connect(ui->spYmin, SIGNAL(valueChanged(double)),
+                     this, SLOT(onYScaleChanged()));
+
+    QObject::connect(ui->spYmax, SIGNAL(valueChanged(double)),
+                     this, SLOT(onYScaleChanged()));
+
     // init port signals
     QObject::connect(&(this->serialPort), SIGNAL(error(QSerialPort::SerialPortError)),
                      this, SLOT(onPortError(QSerialPort::SerialPortError)));
@@ -43,6 +53,13 @@ MainWindow::MainWindow(QWidget *parent) 
     loadBaudRateList();
     ui->cbBaudRate->setCurrentIndex(ui->cbBaudRate->findText("9600"));
 
+    // set limits for axis limit boxes
+    ui->spYmin->setRange(std::numeric_limits<double>::min(),
+                         std::numeric_limits<double>::max());
+
+    ui->spYmax->setRange(std::numeric_limits<double>::min(),
+                         std::numeric_limits<double>::max());
+
     // init plot
     numOfSamples = ui->spNumOfSamples->value();
     dataArray.resize(numOfSamples);
@@ -232,3 +249,31 @@ void MainWindow::onNumOfSamplesChanged(i
         }
     }
 }
+
+void MainWindow::onAutoScaleChecked(bool checked)
+{
+    if (checked)
+    {
+        ui->plot->setAxisAutoScale(QwtPlot::yLeft);
+        ui->lYmin->setEnabled(false);
+        ui->lYmax->setEnabled(false);
+        ui->spYmin->setEnabled(false);
+        ui->spYmax->setEnabled(false);
+    }
+    else
+    {
+        ui->lYmin->setEnabled(true);
+        ui->lYmax->setEnabled(true);
+        ui->spYmin->setEnabled(true);
+        ui->spYmax->setEnabled(true);
+
+        ui->plot->setAxisScale(QwtPlot::yLeft, ui->spYmin->value(),
+                               ui->spYmax->value());
+    }
+}
+
+void MainWindow::onYScaleChanged()
+{
+    ui->plot->setAxisScale(QwtPlot::yLeft, ui->spYmin->value(),
+                           ui->spYmax->value());
+}
diff --git a/mainwindow.h b/mainwindow.h
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -41,6 +41,8 @@ private slots:
     void onPortError(QSerialPort::SerialPortError error);
 
     void onNumOfSamplesChanged(int value);
+    void onAutoScaleChecked(bool checked);
+    void onYScaleChanged();
 
 signals:
     void portToggled(bool open);
diff --git a/mainwindow.ui b/mainwindow.ui
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -440,13 +440,19 @@
           <property name="fieldGrowthPolicy">
            <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
           </property>
-          <item row="2" column="1">
-           <widget class="QDoubleSpinBox" name="spYmax"/>
-          </item>
-          <item row="1" column="1">
+          <item row="3" column="1">
            <widget class="QDoubleSpinBox" name="spYmin">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="maximumSize">
+             <size>
+              <width>75</width>
+              <height>16777215</height>
+             </size>
+            </property>
             <property name="value">
-             <double>1.000000000000000</double>
+             <double>0.000000000000000</double>
             </property>
            </widget>
           </item>
@@ -474,19 +480,48 @@
            </widget>
           </item>
           <item row="1" column="0">
-           <widget class="QCheckBox" name="cbYmin">
+           <widget class="QCheckBox" name="cbAutoScale">
+            <property name="text">
+             <string>Auto Scale Y Axis</string>
+            </property>
+            <property name="checked">
+             <bool>true</bool>
+            </property>
+           </widget>
+          </item>
+          <item row="3" column="0">
+           <widget class="QLabel" name="lYmin">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
             <property name="text">
              <string>Ymin</string>
             </property>
            </widget>
           </item>
           <item row="2" column="0">
-           <widget class="QCheckBox" name="cbYMax">
+           <widget class="QLabel" name="lYmax">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
             <property name="text">
              <string>Ymax</string>
             </property>
            </widget>
           </item>
+          <item row="2" column="1">
+           <widget class="QDoubleSpinBox" name="spYmax">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+            <property name="maximumSize">
+             <size>
+              <width>75</width>
+              <height>16777215</height>
+             </size>
+            </property>
+           </widget>
+          </item>
          </layout>
         </item>
        </layout>
@@ -501,7 +536,7 @@
      <x>0</x>
      <y>0</y>
      <width>653</width>
-     <height>20</height>
+     <height>23</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">