Add GuiMessage, simple message dialog

3 files changed, 172 insertions, 0 deletions

diff --git a/src/gui_gtk.cc b/src/gui_gtk.cc
index 0c251a9..062ac4c 100644
--- a/src/gui_gtk.cc
+++ b/src/gui_gtk.cc
@@ -16,6 +16,7 @@
 #include "gui_listmodel.hh"
 #include "gui_main.hh"
 #include "gui_menu.hh"
+#include "gui_message.hh"
 #include "gui_statusbar.hh"
 #include "gui_textwnd.hh"
 #include "looper.hh"
@@ -1501,6 +1502,69 @@ private:
   bool applied_;
 };
 
+class GtkGuiMessage : public virtual GuiMessage, public GtkGuiWindow {
+public:
+  GtkGuiMessage(Type type, std::string const& title, std::string const& text)
+    : type_(type), title_(title), text_(text), dialog_(nullptr) {
+  }
+
+  ~GtkGuiMessage() override {
+    assert(!dialog_);
+  }
+
+  void set_title(std::string const& title) override {
+    title_ = title;
+    GtkGuiWindow::set_title(title);
+  }
+  std::string const& title() const override {
+    return title_;
+  }
+
+  void* impl() const override {
+    return dialog_;
+  }
+
+  void add_listener(GuiMessage::Listener* listener) override {
+    observers_.insert(listener);
+  }
+
+  void remove_listener(GuiMessage::Listener* listener) override {
+    observers_.erase(listener);
+  }
+
+  void show(GuiWindow* parent) override {
+    if (dialog_) {
+      assert(false);
+      return;
+    }
+    GtkMessageType type = GTK_MESSAGE_OTHER;
+    switch (type_) {
+    case ERROR:
+      type = GTK_MESSAGE_ERROR;
+      break;
+    case OTHER:
+      break;
+    }
+    dialog_ = gtk_message_dialog_new(
+        reinterpret_cast<GtkWindow*>(parent->impl()),
+        GTK_DIALOG_MODAL,
+        type,
+        GTK_BUTTONS_CLOSE,
+        "%s",
+        text_.c_str());
+    gtk_dialog_run(GTK_DIALOG(dialog_));
+    gtk_widget_destroy(dialog_);
+    dialog_ = nullptr;
+  }
+
+protected:
+  Type type_;
+  std::string title_;
+  std::string text_;
+  Observers<GuiMessage::Listener*> observers_;
+  GtkWidget* dialog_;
+};
+
 class GtkGuiTextWindow : public virtual GuiTextWindow, public GtkGuiWindow {
 public:
   GtkGuiTextWindow(std::string const& title, uint32_t width, uint32_t height,
@@ -2140,6 +2204,13 @@ GuiFormApply* GuiFormApply::create(std::string const& title,
 }
 
 // static
+GuiMessage* GuiMessage::create(Type type,
+                               std::string const& title,
+                               std::string const& text) {
+  return new GtkGuiMessage(type, title, text);
+}
+
+// static
 Looper* GuiMain::createLooper() {
   return new GtkLooper();
 }
diff --git a/src/gui_message.hh b/src/gui_message.hh
new file mode 100644
index 0000000..c44cce1
--- /dev/null
+++ b/src/gui_message.hh
@@ -0,0 +1,38 @@
+// -*- mode: c++; c-basic-offset: 2; -*-
+
+#ifndef GUI_MESSAGE_HH
+#define GUI_MESSAGE_HH
+
+#include <string>
+#include <vector>
+
+#include "gui_window.hh"
+
+class GuiMessage : public GuiWindow {
+public:
+  class Listener : public GuiWindow::Listener {
+  public:
+    virtual ~Listener() {}
+
+  protected:
+    Listener() {}
+  };
+
+  enum Type {
+    ERROR,
+    OTHER,
+  };
+
+  static GuiMessage* create(Type type, std::string const& title,
+                            std::string const& text);
+
+  virtual void add_listener(Listener* listener) = 0;
+  virtual void remove_listener(Listener* listener) = 0;
+
+  virtual void show(GuiWindow* parent) = 0;
+
+protected:
+  GuiMessage() {}
+};
+
+#endif  // GUI_MESSAGE_HH
diff --git a/src/gui_qt.cc b/src/gui_qt.cc
index 17eda8f..9ffdfc9 100644
--- a/src/gui_qt.cc
+++ b/src/gui_qt.cc
@@ -46,6 +46,7 @@
 #include "gui_listmodel.hh"
 #include "gui_main.hh"
 #include "gui_menu.hh"
+#include "gui_message.hh"
 #include "gui_statusbar.hh"
 #include "gui_textwnd.hh"
 #include "looper.hh"
@@ -1334,6 +1335,61 @@ private:
   bool applied_;
 };
 
+class QtGuiMessage : public virtual GuiMessage, public QtGuiWindow {
+public:
+  QtGuiMessage(Type type, std::string const& title, std::string const& text)
+    : type_(type), title_(title), text_(text) {
+  }
+
+  void add_listener(GuiMessage::Listener* listener) override {
+    observers_.insert(listener);
+  }
+
+  void remove_listener(GuiMessage::Listener* listener) override {
+    observers_.erase(listener);
+  }
+
+  void set_title(std::string const& title) override {
+    title_ = title;
+  }
+  std::string const& title() const override {
+    return title_;
+  }
+
+  void* impl() const override {
+    return QtGuiWindow::impl();
+  }
+
+  bool showWidget() override {
+    show(QApplication::activeWindow());
+    return true;
+  }
+
+  void show(GuiWindow* parent) override {
+    auto wnd = static_cast<QtGuiWindow*>(parent->impl());
+    show(wnd->widget());
+  }
+
+protected:
+  void show(QWidget* parent) {
+    switch (type_) {
+    case ERROR:
+      QMessageBox::critical(parent, QString::fromStdString(title_),
+                            QString::fromStdString(text_));
+      break;
+    case OTHER:
+      QMessageBox::information(parent, QString::fromStdString(title_),
+                               QString::fromStdString(text_));
+      break;
+    }
+  }
+
+  Type type_;
+  std::string title_;
+  std::string text_;
+  Observers<GuiMessage::Listener*> observers_;
+};
+
 class OptionalCloseWidget : public QWidget {
 public:
   class Delegate {
@@ -1733,6 +1789,13 @@ GuiFormApply* GuiFormApply::create(std::string const& title,
 }
 
 // static
+GuiMessage* GuiMessage::create(Type type,
+                               std::string const& title,
+                               std::string const& text) {
+  return new QtGuiMessage(type, title, text);
+}
+
+// static
 Looper* GuiMain::createLooper() {
   return new QtLooper();
 }