add dialog example.

WebApplication/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_library(WebApplication
     WebApplication.h WebApplication.cpp
     Hello.h Hello.cpp
+    Dialog.h Dialog.cpp
     Session.h Session.cpp
     User.h User.cpp
 )

WebApplication/Dialog.cpp

@@ -0,0 +1,95 @@
+#include "Dialog.h"
+#include <Wt/WMessageBox.h>
+#include <Wt/WPushButton.h>
+
+Dialog::Dialog() {
+
+    Wt::WContainerWidget *textdiv = addWidget(std::make_unique<Wt::WContainerWidget>());
+    textdiv->setStyleClass("text");
+
+    Wt::WContainerWidget *buttons = addWidget(std::make_unique<Wt::WContainerWidget>());
+    buttons->setStyleClass("buttons");
+
+    Wt::WPushButton *button = buttons->addWidget(std::make_unique<Wt::WPushButton>("One liner"));
+    button->clicked().connect(this, &Dialog::messageBox1);
+
+    button = buttons->addWidget(std::make_unique<Wt::WPushButton>("Comfortable?"));
+    button->clicked().connect(this, &Dialog::messageBox2);
+
+    button = buttons->addWidget(std::make_unique<Wt::WPushButton>("Havoc!"));
+    button->clicked().connect(this, &Dialog::messageBox3);
+
+    button = buttons->addWidget(std::make_unique<Wt::WPushButton>("Discard"));
+    button->clicked().connect(this, &Dialog::messageBox4);
+
+    textdiv = addWidget(std::make_unique<Wt::WContainerWidget>());
+    textdiv->setStyleClass("text");
+    m_status = textdiv->addWidget(std::make_unique<Wt::WText>("Go ahead..."));
+}
+
+void Dialog::setStatus(const Wt::WString &result) {
+    m_status->setText(result);
+}
+
+void Dialog::messageBox1() {
+    Wt::WMessageBox::show("信息", "这是一个对话框示例。", Wt::StandardButton::Ok);
+    setStatus("Ok'ed");
+}
+
+void Dialog::messageBox2() {
+    m_messageBox = std::make_unique<Wt::WMessageBox>("Question", "Are you getting comfortable ?", Wt::Icon::Question,
+                                                     Wt::StandardButton::Yes | Wt::StandardButton::No |
+                                                         Wt::StandardButton::Cancel);
+
+    m_messageBox->buttonClicked().connect(this, &Dialog::messageBoxDone);
+
+    m_messageBox->animateShow(
+        Wt::WAnimation(Wt::AnimationEffect::Pop | Wt::AnimationEffect::Fade, Wt::TimingFunction::Linear, 250));
+}
+
+void Dialog::messageBox3() {
+    Wt::StandardButton result = Wt::WMessageBox::show("Confirm", "About to wreak havoc... Continue ?",
+                                                      Wt::StandardButton::Ok | Wt::StandardButton::Cancel,
+                                                      Wt::WAnimation(Wt::AnimationEffect::SlideInFromTop));
+    if (result == Wt::StandardButton::Ok)
+        setStatus("Wreaking havoc.");
+    else
+        setStatus("Cancelled!");
+}
+
+void Dialog::messageBox4() {
+    m_messageBox = std::make_unique<Wt::WMessageBox>("Warning!",
+                                                     "Are you sure you want to continue?\n"
+                                                     "You have unsaved changes.",
+                                                     Wt::Icon::None, Wt::StandardButton::None);
+
+    m_messageBox->addButton("Discard Modifications", Wt::StandardButton::Ok);
+    Wt::WPushButton *continueButton = m_messageBox->addButton("Cancel", Wt::StandardButton::Cancel);
+    m_messageBox->setDefaultButton(continueButton);
+
+    m_messageBox->buttonClicked().connect(this, &Dialog::messageBoxDone);
+
+    m_messageBox->setOffsets(0, Wt::Side::Bottom);
+    m_messageBox->animateShow(Wt::WAnimation(Wt::AnimationEffect::SlideInFromBottom | Wt::AnimationEffect::Fade,
+                                             Wt::TimingFunction::Linear, 250));
+}
+
+void Dialog::messageBoxDone(Wt::StandardButton result) {
+    switch (result) {
+    case Wt::StandardButton::Ok:
+        setStatus("Ok'ed");
+        break;
+    case Wt::StandardButton::Cancel:
+        setStatus("Cancelled!");
+        break;
+    case Wt::StandardButton::Yes:
+        setStatus("Me too!");
+        break;
+    case Wt::StandardButton::No:
+        setStatus("Me neither!");
+        break;
+    default:
+        setStatus("Unknown result?");
+    }
+    m_messageBox.reset();
+}

WebApplication/Dialog.h

@@ -0,0 +1,22 @@
+#ifndef __DIALOG_H__
+#define __DIALOG_H__
+
+#include <Wt/WContainerWidget.h>
+
+class Dialog : public Wt::WContainerWidget {
+public:
+    Dialog();
+
+protected:
+    void setStatus(const Wt::WString &result);
+    void messageBox1();
+    void messageBox2();
+    void messageBox3();
+  void messageBox4();
+    void messageBoxDone(Wt::StandardButton result);
+
+private:
+    Wt::WText *m_status = nullptr;
+    std::unique_ptr<Wt::WMessageBox> m_messageBox;
+};
+#endif // __DIALOG_H__

WebApplication/Hello.cpp

@@ -1,5 +1,6 @@
 #include "Hello.h"
 #include "BoostLog.h"
+#include "Dialog.h"
 #include "Session.h"
 #include <Wt/Auth/AuthService.h>
 #include <Wt/Auth/AuthWidget.h>
@@ -61,6 +62,8 @@ Hello::Hello(const Wt::WEnvironment &env, bool embedded) : Wt::WApplication(env)
     authWidget->setRegistrationEnabled(true);
     authWidget->processEnvironment();
     top->addWidget(std::move(authWidget));
+
+    top->addWidget(std::make_unique<Dialog>());
 }
 
 Hello::~Hello() {