feat: Add apply button for server configuration form.

shadowsocks-csharp/Data/ja.txt

@@ -61,6 +61,7 @@ Remarks=付記
 Timeout(Sec)=タイムアウト (秒)
 OK=OK
 Cancel=キャンセル
+Apply=適用
 New server=新規サーバー
 Move &Up=上に移動 (&U)
 Move D&own=下に移動 (&O)

shadowsocks-csharp/Data/zh_CN.txt

@@ -62,6 +62,7 @@ Remarks=备注
 Timeout(Sec)=超时(秒)
 OK=确定
 Cancel=取消
+Apply=应用
 New server=未配置的服务器
 Move &Up=上移(&U)
 Move D&own=下移(&O)

shadowsocks-csharp/Data/zh_TW.txt

@@ -61,6 +61,7 @@ Remarks=註解
 Timeout(Sec)=逾時 (秒)
 OK=確定
 Cancel=取消
+Apply=應用
 New server=新伺服器
 Move &Up=上移 (&U)
 Move D&own=下移 (&O)

shadowsocks-csharp/View/ConfigForm.Designer.cs

@@ -53,6 +53,7 @@
             this.panel2 = new System.Windows.Forms.Panel();
             this.OKButton = new System.Windows.Forms.Button();
             this.MyCancelButton = new System.Windows.Forms.Button();
+            this.ApplyButton = new System.Windows.Forms.Button();
             this.DeleteButton = new System.Windows.Forms.Button();
             this.AddButton = new System.Windows.Forms.Button();
             this.ServerGroupBox = new System.Windows.Forms.GroupBox();
@@ -230,7 +231,7 @@
             // 
             // EncryptionSelect
             // 
-            this.EncryptionSelect.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            this.EncryptionSelect.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
             | System.Windows.Forms.AnchorStyles.Right)));
             this.EncryptionSelect.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
             this.EncryptionSelect.FormattingEnabled = true;
@@ -303,7 +304,7 @@
             // 
             // ShowPasswdCheckBox
             // 
-            this.ShowPasswdCheckBox.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            this.ShowPasswdCheckBox.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
             | System.Windows.Forms.AnchorStyles.Left)));
             this.ShowPasswdCheckBox.AutoSize = true;
             this.ShowPasswdCheckBox.Location = new System.Drawing.Point(113, 87);
@@ -386,7 +387,7 @@
             this.MyCancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
             this.MyCancelButton.Dock = System.Windows.Forms.DockStyle.Right;
             this.MyCancelButton.Location = new System.Drawing.Point(84, 3);
-            this.MyCancelButton.Margin = new System.Windows.Forms.Padding(3, 3, 0, 0);
+            this.MyCancelButton.Margin = new System.Windows.Forms.Padding(3, 3, 3, 0);
             this.MyCancelButton.Name = "MyCancelButton";
             this.MyCancelButton.Size = new System.Drawing.Size(75, 23);
             this.MyCancelButton.TabIndex = 18;
@@ -394,6 +395,19 @@
             this.MyCancelButton.UseVisualStyleBackColor = true;
             this.MyCancelButton.Click += new System.EventHandler(this.CancelButton_Click);
             // 
+            // ApplyButton
+            // 
+            this.ApplyButton.Enabled = false;
+            this.ApplyButton.Dock = System.Windows.Forms.DockStyle.Right;
+            this.ApplyButton.Location = new System.Drawing.Point(165, 3);
+            this.ApplyButton.Margin = new System.Windows.Forms.Padding(3, 3, 0, 0);
+            this.ApplyButton.Name = "ApplyButton";
+            this.ApplyButton.Size = new System.Drawing.Size(75, 23);
+            this.ApplyButton.TabIndex = 19;
+            this.ApplyButton.Text = "Apply";
+            this.ApplyButton.UseVisualStyleBackColor = true;
+            this.ApplyButton.Click += new System.EventHandler(this.ApplyButton_Click);
+            // 
             // DeleteButton
             // 
             this.DeleteButton.Dock = System.Windows.Forms.DockStyle.Right;
@@ -510,7 +524,7 @@
             // 
             // tableLayoutPanel5
             // 
-            this.tableLayoutPanel5.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            this.tableLayoutPanel5.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
             | System.Windows.Forms.AnchorStyles.Left)));
             this.tableLayoutPanel5.AutoSize = true;
             this.tableLayoutPanel5.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
@@ -567,19 +581,21 @@
             // 
             this.tableLayoutPanel3.AutoSize = true;
             this.tableLayoutPanel3.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
-            this.tableLayoutPanel3.ColumnCount = 2;
+            this.tableLayoutPanel3.ColumnCount = 3;
+            this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 20F));
             this.tableLayoutPanel3.Controls.Add(this.MyCancelButton, 1, 0);
             this.tableLayoutPanel3.Controls.Add(this.OKButton, 0, 0);
+            this.tableLayoutPanel3.Controls.Add(this.ApplyButton, 2, 0);
             this.tableLayoutPanel3.Dock = System.Windows.Forms.DockStyle.Right;
-            this.tableLayoutPanel3.Location = new System.Drawing.Point(309, 397);
+            this.tableLayoutPanel3.Location = new System.Drawing.Point(309, 316);
             this.tableLayoutPanel3.Margin = new System.Windows.Forms.Padding(3, 3, 0, 3);
             this.tableLayoutPanel3.Name = "tableLayoutPanel3";
             this.tableLayoutPanel3.RowCount = 1;
             this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle());
-            this.tableLayoutPanel3.Size = new System.Drawing.Size(159, 26);
+            this.tableLayoutPanel3.Size = new System.Drawing.Size(240, 26);
             this.tableLayoutPanel3.TabIndex = 8;
             // 
             // tableLayoutPanel4
@@ -664,6 +680,7 @@
         private System.Windows.Forms.Panel panel2;
         private System.Windows.Forms.Button OKButton;
         private System.Windows.Forms.Button MyCancelButton;
+        private System.Windows.Forms.Button ApplyButton;
         private System.Windows.Forms.Button DeleteButton;
         private System.Windows.Forms.Button AddButton;
         private System.Windows.Forms.GroupBox ServerGroupBox;

shadowsocks-csharp/View/ConfigForm.cs

@@ -1,15 +1,9 @@
 using System;
-using System.Collections.Generic;
-using System.ComponentModel;
 using System.Drawing;
-using System.Text;
 using System.Windows.Forms;
-using System.Diagnostics;
-using Microsoft.Win32;
 using Shadowsocks.Controller;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
-using System.Threading.Tasks;
 
 namespace Shadowsocks.View
 {
@@ -32,6 +26,7 @@ namespace Shadowsocks.View
             this.PerformLayout();
 
             UpdateTexts();
+            SetupValueChangedListeners();
             this.Icon = Icon.FromHandle(Resources.ssw128.GetHicon());
 
             this.controller = controller;
@@ -62,16 +57,37 @@ namespace Shadowsocks.View
             ServerGroupBox.Text = I18N.GetString("Server");
             OKButton.Text = I18N.GetString("OK");
             MyCancelButton.Text = I18N.GetString("Cancel");
+            ApplyButton.Text = I18N.GetString("Apply");
             MoveUpButton.Text = I18N.GetString("Move &Up");
             MoveDownButton.Text = I18N.GetString("Move D&own");
             this.Text = I18N.GetString("Edit Servers");
         }
 
+        private void SetupValueChangedListeners()
+        {
+            IPTextBox.TextChanged += ConfigValueChanged;
+            ProxyPortTextBox.TextChanged += ConfigValueChanged;
+            PasswordTextBox.TextChanged += ConfigValueChanged;
+            EncryptionSelect.SelectedIndexChanged += ConfigValueChanged;
+            PluginTextBox.TextChanged += ConfigValueChanged;
+            PluginArgumentsTextBox.TextChanged += ConfigValueChanged;
+            PluginOptionsTextBox.TextChanged += ConfigValueChanged;
+            RemarksTextBox.TextChanged += ConfigValueChanged;
+            TimeoutTextBox.TextChanged += ConfigValueChanged;
+            PortableModeCheckBox.CheckedChanged += ConfigValueChanged;
+            ServerPortTextBox.TextChanged += ConfigValueChanged;
+        }
+
         private void controller_ConfigChanged(object sender, EventArgs e)
         {
             LoadCurrentConfiguration();
         }
 
+        private void ConfigValueChanged(object sender, EventArgs e)
+        {
+            ApplyButton.Enabled = true;
+        }
+
         private bool ValidateAndSaveSelectedServerDetails()
         {
             try
@@ -186,6 +202,7 @@ namespace Shadowsocks.View
             LoadSelectedServerDetails();
             ProxyPortTextBox.Text = _modifiedConfiguration.localPort.ToString();
             PortableModeCheckBox.Checked = _modifiedConfiguration.portableMode;
+            ApplyButton.Enabled = false;
         }
 
         private bool SaveValidConfiguration()
@@ -308,6 +325,11 @@ namespace Shadowsocks.View
             this.Close();
         }
 
+        private void ApplyButton_Click(object sender, EventArgs e)
+        {
+            SaveValidConfiguration();
+        }
+
         private void ConfigForm_Shown(object sender, EventArgs e)
         {
             IPTextBox.Focus();