From 4a9a9a25bc90535e03c9507514a1f9d9b0cfc5bb Mon Sep 17 00:00:00 2001
From: yunhan0 <yunhn.lee@gmail.com>
Date: Sat, 24 Mar 2018 15:43:06 +1100
Subject: [PATCH] abstract number only text editor

---
 JacktripGui.xcodeproj/project.pbxproj         |  4 ++
 JacktripGui/Base.lproj/Main.storyboard        | 56 +++++++++----------
 .../Controller/JacktripViewController.swift   |  7 ---
 JacktripGui/View/BlankWindow.swift            |  4 +-
 JacktripGui/View/NumberOnlyTextField.swift    | 16 ++++++
 5 files changed, 49 insertions(+), 38 deletions(-)
 create mode 100644 JacktripGui/View/NumberOnlyTextField.swift

diff --git a/JacktripGui.xcodeproj/project.pbxproj b/JacktripGui.xcodeproj/project.pbxproj
index 28753a0..5fcb281 100644
--- a/JacktripGui.xcodeproj/project.pbxproj
+++ b/JacktripGui.xcodeproj/project.pbxproj
@@ -15,6 +15,7 @@
 		37742275205A3BD800793886 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 37742274205A3BD800793886 /* Assets.xcassets */; };
 		37742278205A3BD800793886 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 37742276205A3BD800793886 /* Main.storyboard */; };
 		37C78C532066003100390FD7 /* ServerTableView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 37C78C522066003100390FD7 /* ServerTableView.swift */; };
+		37C78C5520660DB900390FD7 /* NumberOnlyTextField.swift in Sources */ = {isa = PBXBuildFile; fileRef = 37C78C5420660DB900390FD7 /* NumberOnlyTextField.swift */; };
 		37DB0BF42063745C0062376D /* NumberOnlyFormatter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 37DB0BF32063745C0062376D /* NumberOnlyFormatter.swift */; };
 		37DB0BF82064AECC0062376D /* BlankWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 37DB0BF72064AECC0062376D /* BlankWindow.swift */; };
 /* End PBXBuildFile section */
@@ -31,6 +32,7 @@
 		37742279205A3BD800793886 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		3774227A205A3BD800793886 /* JacktripGui.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = JacktripGui.entitlements; sourceTree = "<group>"; };
 		37C78C522066003100390FD7 /* ServerTableView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ServerTableView.swift; sourceTree = "<group>"; };
+		37C78C5420660DB900390FD7 /* NumberOnlyTextField.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NumberOnlyTextField.swift; sourceTree = "<group>"; };
 		37DB0BF32063745C0062376D /* NumberOnlyFormatter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NumberOnlyFormatter.swift; sourceTree = "<group>"; };
 		37DB0BF72064AECC0062376D /* BlankWindow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BlankWindow.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -51,6 +53,7 @@
 			children = (
 				37DB0BF72064AECC0062376D /* BlankWindow.swift */,
 				370B4A662061D9E200DD0ABE /* ProcessTrigger.swift */,
+				37C78C5420660DB900390FD7 /* NumberOnlyTextField.swift */,
 				37DB0BF32063745C0062376D /* NumberOnlyFormatter.swift */,
 				37C78C522066003100390FD7 /* ServerTableView.swift */,
 			);
@@ -185,6 +188,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				37742271205A3BD800793886 /* AppDelegate.swift in Sources */,
+				37C78C5520660DB900390FD7 /* NumberOnlyTextField.swift in Sources */,
 				370B4A632060B9B300DD0ABE /* GlobalConstants.swift in Sources */,
 				37C78C532066003100390FD7 /* ServerTableView.swift in Sources */,
 				370B4A672061D9E200DD0ABE /* ProcessTrigger.swift in Sources */,
diff --git a/JacktripGui/Base.lproj/Main.storyboard b/JacktripGui/Base.lproj/Main.storyboard
index 7d1f341..408d25e 100644
--- a/JacktripGui/Base.lproj/Main.storyboard
+++ b/JacktripGui/Base.lproj/Main.storyboard
@@ -708,14 +708,14 @@
             <objects>
                 <viewController id="XfG-lQ-9wD" customClass="JacktripViewController" customModule="JacktripGui" customModuleProvider="target" sceneMemberID="viewController">
                     <view key="view" wantsLayer="YES" id="m2S-Jp-Qdl">
-                        <rect key="frame" x="0.0" y="0.0" width="755" height="548"/>
+                        <rect key="frame" x="0.0" y="0.0" width="756" height="548"/>
                         <autoresizingMask key="autoresizingMask"/>
                         <subviews>
                             <stackView distribution="fill" orientation="vertical" alignment="trailing" spacing="10" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" detachesHiddenViews="YES" translatesAutoresizingMaskIntoConstraints="NO" id="u6I-yr-vP6">
-                                <rect key="frame" x="30" y="30" width="695" height="498"/>
+                                <rect key="frame" x="30" y="30" width="696" height="498"/>
                                 <subviews>
                                     <stackView distribution="fill" orientation="horizontal" alignment="top" spacing="10" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" detachesHiddenViews="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Agy-eh-hLs">
-                                        <rect key="frame" x="0.0" y="476" width="695" height="22"/>
+                                        <rect key="frame" x="0.0" y="476" width="696" height="22"/>
                                         <subviews>
                                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="P06-CF-zL4">
                                                 <rect key="frame" x="-2" y="5" width="47" height="17"/>
@@ -733,8 +733,8 @@
                                                     <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
                                                 </textFieldCell>
                                             </textField>
-                                            <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Spn-b9-KJ5">
-                                                <rect key="frame" x="340" y="0.0" width="276" height="22"/>
+                                            <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Spn-b9-KJ5" customClass="NumberOnlyTextField" customModule="JacktripGui" customModuleProvider="target">
+                                                <rect key="frame" x="340" y="0.0" width="277" height="22"/>
                                                 <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" placeholderString="Port" drawsBackground="YES" id="5VD-19-WHq">
                                                     <font key="font" metaFont="system"/>
                                                     <color key="textColor" name="textColor" catalog="System" colorSpace="catalog"/>
@@ -742,7 +742,7 @@
                                                 </textFieldCell>
                                             </textField>
                                             <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="6Ws-de-4yx" customClass="ProcessTrigger" customModule="JacktripGui" customModuleProvider="target">
-                                                <rect key="frame" x="620" y="-6" width="81" height="32"/>
+                                                <rect key="frame" x="621" y="-6" width="81" height="32"/>
                                                 <buttonCell key="cell" type="push" title="Button" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="hZZ-4I-Pc9">
                                                     <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                                     <font key="font" metaFont="system"/>
@@ -769,7 +769,7 @@
                                         </customSpacing>
                                     </stackView>
                                     <stackView distribution="fill" orientation="horizontal" alignment="top" spacing="10" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" detachesHiddenViews="YES" translatesAutoresizingMaskIntoConstraints="NO" id="hJm-Cr-tm3">
-                                        <rect key="frame" x="0.0" y="299" width="695" height="167"/>
+                                        <rect key="frame" x="0.0" y="299" width="696" height="167"/>
                                         <subviews>
                                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="dNv-Fj-6pq">
                                                 <rect key="frame" x="-2" y="150" width="48" height="17"/>
@@ -780,19 +780,19 @@
                                                 </textFieldCell>
                                             </textField>
                                             <scrollView autohidesScrollers="YES" horizontalLineScroll="31" horizontalPageScroll="10" verticalLineScroll="31" verticalPageScroll="10" usesPredominantAxisScrolling="NO" translatesAutoresizingMaskIntoConstraints="NO" id="wQH-CU-Ou4">
-                                                <rect key="frame" x="54" y="0.0" width="641" height="167"/>
+                                                <rect key="frame" x="54" y="0.0" width="642" height="167"/>
                                                 <clipView key="contentView" id="QH7-wG-7hv">
-                                                    <rect key="frame" x="1" y="0.0" width="639" height="166"/>
+                                                    <rect key="frame" x="1" y="0.0" width="640" height="166"/>
                                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                     <subviews>
                                                         <tableView verticalHuggingPriority="750" allowsExpansionToolTips="YES" columnAutoresizingStyle="firstColumnOnly" alternatingRowBackgroundColors="YES" columnSelection="YES" multipleSelection="NO" autosaveColumns="NO" rowHeight="29" headerView="Wga-RL-EBw" viewBased="YES" id="wti-hw-zYU" customClass="ServerTableView" customModule="JacktripGui" customModuleProvider="target">
-                                                            <rect key="frame" x="0.0" y="0.0" width="639" height="143"/>
+                                                            <rect key="frame" x="0.0" y="0.0" width="640" height="143"/>
                                                             <autoresizingMask key="autoresizingMask"/>
                                                             <size key="intercellSpacing" width="3" height="2"/>
                                                             <color key="backgroundColor" name="controlBackgroundColor" catalog="System" colorSpace="catalog"/>
                                                             <color key="gridColor" name="gridColor" catalog="System" colorSpace="catalog"/>
                                                             <tableColumns>
-                                                                <tableColumn identifier="port" width="501" minWidth="40" maxWidth="1000" id="ahB-Gt-Uc8">
+                                                                <tableColumn identifier="port" width="502" minWidth="40" maxWidth="1000" id="ahB-Gt-Uc8">
                                                                     <tableHeaderCell key="headerCell" lineBreakMode="truncatingTail" borderStyle="border" title="Port">
                                                                         <font key="font" metaFont="smallSystem"/>
                                                                         <color key="textColor" name="headerTextColor" catalog="System" colorSpace="catalog"/>
@@ -806,11 +806,11 @@
                                                                     <tableColumnResizingMask key="resizingMask" resizeWithTable="YES" userResizable="YES"/>
                                                                     <prototypeCellViews>
                                                                         <tableCellView id="cSk-T9-fjW">
-                                                                            <rect key="frame" x="1" y="1" width="501" height="17"/>
+                                                                            <rect key="frame" x="1" y="1" width="502" height="17"/>
                                                                             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                                             <subviews>
                                                                                 <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="pjY-AH-0VA">
-                                                                                    <rect key="frame" x="0.0" y="0.0" width="501" height="17"/>
+                                                                                    <rect key="frame" x="0.0" y="0.0" width="502" height="17"/>
                                                                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
                                                                                     <textFieldCell key="cell" lineBreakMode="truncatingTail" sendsActionOnEndEditing="YES" identifier="port" title="Table View Cell" id="7nk-Fd-EP3">
                                                                                         <font key="font" metaFont="system"/>
@@ -839,7 +839,7 @@
                                                                     <tableColumnResizingMask key="resizingMask" resizeWithTable="YES" userResizable="YES"/>
                                                                     <prototypeCellViews>
                                                                         <button identifier="operation" verticalHuggingPriority="750" id="Nlp-vL-vmx" customClass="ProcessTrigger" customModule="JacktripGui" customModuleProvider="target">
-                                                                            <rect key="frame" x="505" y="1" width="132" height="32"/>
+                                                                            <rect key="frame" x="506" y="1" width="132" height="32"/>
                                                                             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                                                             <buttonCell key="cell" type="push" title="Button" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="y0r-Uv-Emz">
                                                                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
@@ -864,7 +864,7 @@
                                                     <autoresizingMask key="autoresizingMask"/>
                                                 </scroller>
                                                 <tableHeaderView key="headerView" id="Wga-RL-EBw">
-                                                    <rect key="frame" x="0.0" y="0.0" width="639" height="23"/>
+                                                    <rect key="frame" x="0.0" y="0.0" width="640" height="23"/>
                                                     <autoresizingMask key="autoresizingMask"/>
                                                 </tableHeaderView>
                                             </scrollView>
@@ -879,7 +879,7 @@
                                         </customSpacing>
                                     </stackView>
                                     <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="10" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" detachesHiddenViews="YES" translatesAutoresizingMaskIntoConstraints="NO" id="mEC-RD-6OS">
-                                        <rect key="frame" x="0.0" y="208" width="695" height="81"/>
+                                        <rect key="frame" x="0.0" y="208" width="696" height="81"/>
                                         <subviews>
                                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="zjl-mW-43j">
                                                 <rect key="frame" x="-2" y="64" width="109" height="17"/>
@@ -900,7 +900,7 @@
                                                             <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                                                         </textFieldCell>
                                                     </textField>
-                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="pRp-We-x25">
+                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="pRp-We-x25" customClass="NumberOnlyTextField" customModule="JacktripGui" customModuleProvider="target">
                                                         <rect key="frame" x="106" y="0.0" width="194" height="22"/>
                                                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" placeholderString="default 2" drawsBackground="YES" id="g64-PS-sFB">
                                                             <font key="font" metaFont="system"/>
@@ -916,7 +916,7 @@
                                                             <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                                                         </textFieldCell>
                                                     </textField>
-                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Ok0-sF-ajW">
+                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Ok0-sF-ajW" customClass="NumberOnlyTextField" customModule="JacktripGui" customModuleProvider="target">
                                                         <rect key="frame" x="480" y="0.0" width="194" height="22"/>
                                                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" placeholderString="default 4" drawsBackground="YES" id="lBe-G0-nmn">
                                                             <font key="font" metaFont="system"/>
@@ -952,7 +952,7 @@
                                                             <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                                                         </textFieldCell>
                                                     </textField>
-                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="5ML-3W-N4w">
+                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="5ML-3W-N4w" customClass="NumberOnlyTextField" customModule="JacktripGui" customModuleProvider="target">
                                                         <rect key="frame" x="106" y="0.0" width="194" height="22"/>
                                                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" placeholderString="defalut 1" drawsBackground="YES" id="KmZ-Bd-e06">
                                                             <font key="font" metaFont="system"/>
@@ -968,7 +968,7 @@
                                                             <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                                                         </textFieldCell>
                                                     </textField>
-                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="8kj-0W-G0E">
+                                                    <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="8kj-0W-G0E" customClass="NumberOnlyTextField" customModule="JacktripGui" customModuleProvider="target">
                                                         <rect key="frame" x="480" y="0.0" width="194" height="22"/>
                                                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" placeholderString="default 16" drawsBackground="YES" id="vj2-Vb-Wcx">
                                                             <font key="font" metaFont="system"/>
@@ -1011,7 +1011,7 @@
                                         </customSpacing>
                                     </stackView>
                                     <stackView distribution="fill" orientation="horizontal" alignment="top" spacing="10" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" detachesHiddenViews="YES" translatesAutoresizingMaskIntoConstraints="NO" id="ZmC-qM-7P2">
-                                        <rect key="frame" x="0.0" y="31" width="695" height="167"/>
+                                        <rect key="frame" x="0.0" y="31" width="696" height="167"/>
                                         <subviews>
                                             <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="10f-Z1-ouj">
                                                 <rect key="frame" x="-2" y="150" width="48" height="17"/>
@@ -1022,17 +1022,17 @@
                                                 </textFieldCell>
                                             </textField>
                                             <scrollView horizontalLineScroll="10" horizontalPageScroll="10" verticalLineScroll="10" verticalPageScroll="10" hasHorizontalScroller="NO" usesPredominantAxisScrolling="NO" translatesAutoresizingMaskIntoConstraints="NO" id="eDE-x3-kbB">
-                                                <rect key="frame" x="54" y="0.0" width="641" height="167"/>
+                                                <rect key="frame" x="54" y="0.0" width="642" height="167"/>
                                                 <clipView key="contentView" id="BaL-ne-nL9">
-                                                    <rect key="frame" x="1" y="1" width="639" height="165"/>
+                                                    <rect key="frame" x="1" y="1" width="640" height="165"/>
                                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                     <subviews>
                                                         <textView editable="NO" importsGraphics="NO" verticallyResizable="YES" usesFontPanel="YES" findStyle="panel" continuousSpellChecking="YES" allowsUndo="YES" usesRuler="YES" allowsNonContiguousLayout="YES" quoteSubstitution="YES" dashSubstitution="YES" spellingCorrection="YES" smartInsertDelete="YES" id="8Ua-5y-uhL">
-                                                            <rect key="frame" x="0.0" y="0.0" width="639" height="165"/>
+                                                            <rect key="frame" x="0.0" y="0.0" width="640" height="165"/>
                                                             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                             <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                                                            <size key="minSize" width="639" height="165"/>
-                                                            <size key="maxSize" width="639" height="10000000"/>
+                                                            <size key="minSize" width="640" height="165"/>
+                                                            <size key="maxSize" width="640" height="10000000"/>
                                                             <color key="insertionPointColor" white="0.0" alpha="1" colorSpace="calibratedWhite"/>
                                                         </textView>
                                                     </subviews>
@@ -1043,7 +1043,7 @@
                                                     <autoresizingMask key="autoresizingMask"/>
                                                 </scroller>
                                                 <scroller key="verticalScroller" verticalHuggingPriority="750" doubleValue="1" horizontal="NO" id="Imv-66-hMK">
-                                                    <rect key="frame" x="624" y="1" width="16" height="165"/>
+                                                    <rect key="frame" x="625" y="1" width="16" height="165"/>
                                                     <autoresizingMask key="autoresizingMask"/>
                                                 </scroller>
                                             </scrollView>
@@ -1058,7 +1058,7 @@
                                         </customSpacing>
                                     </stackView>
                                     <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="KJF-sf-fLf">
-                                        <rect key="frame" x="631" y="-7" width="70" height="32"/>
+                                        <rect key="frame" x="632" y="-7" width="70" height="32"/>
                                         <buttonCell key="cell" type="push" title="clear" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="TyI-0k-Yvp">
                                             <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                             <font key="font" metaFont="system"/>
diff --git a/JacktripGui/Controller/JacktripViewController.swift b/JacktripGui/Controller/JacktripViewController.swift
index d6d44f8..b4b0f55 100644
--- a/JacktripGui/Controller/JacktripViewController.swift
+++ b/JacktripGui/Controller/JacktripViewController.swift
@@ -50,13 +50,6 @@ class JacktripViewController: NSViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         NotificationCenter.default.addObserver(self, selector: #selector(JacktripViewController.updateLog), name: NSNotification.Name(rawValue: ProcessPipeNotificationKey), object: nil)
-        
-        // Some textfields only allow number input
-        port.formatter          = NumberOnlyFormatter()
-        numchannels.formatter   = NumberOnlyFormatter()
-        queue.formatter         = NumberOnlyFormatter()
-        redundancy.formatter    = NumberOnlyFormatter()
-        bitres.formatter        = NumberOnlyFormatter()
     }
     
     override var representedObject: Any? {
diff --git a/JacktripGui/View/BlankWindow.swift b/JacktripGui/View/BlankWindow.swift
index cffd058..358ea51 100644
--- a/JacktripGui/View/BlankWindow.swift
+++ b/JacktripGui/View/BlankWindow.swift
@@ -12,6 +12,4 @@ import Cocoa
  * Resolve: Unknown Window class (null) in Interface Builder file, creating generic Window instead
  * Issue happens only in version below 10.13
  */
-class BlankWindow: NSWindow {
-
-}
+class BlankWindow: NSWindow {}
diff --git a/JacktripGui/View/NumberOnlyTextField.swift b/JacktripGui/View/NumberOnlyTextField.swift
new file mode 100644
index 0000000..e12769c
--- /dev/null
+++ b/JacktripGui/View/NumberOnlyTextField.swift
@@ -0,0 +1,16 @@
+//
+//  NumberOnlyTextField.swift
+//  JacktripGui
+//
+//  Created by Yunhan Li on 24/3/18.
+//  Copyright © 2018 NSI Lab. All rights reserved.
+//
+
+import Cocoa
+
+class NumberOnlyTextField: NSTextField {
+    required init?(coder: NSCoder) {
+        super.init(coder: coder)
+        self.formatter = NumberOnlyFormatter()
+    }
+}