Fleshed out some of DialogOverlay -- we can set a title and a message, and have the overlay automatically resize itself based on content. Supports line breaking for the message.

src/musikbox/CMakeLists.txt

@@ -31,6 +31,7 @@ set (BOX_SRCS
 	./cursespp/App.cpp
 	./cursespp/Checkbox.cpp
 	./cursespp/Colors.cpp
+	./cursespp/DialogOverlay.cpp
 	./cursespp/LayoutBase.cpp
 	./cursespp/LayoutStack.cpp
 	./cursespp/ListWindow.cpp

src/musikbox/cursespp/App.cpp

@@ -259,12 +259,9 @@ void App::CheckShowOverlay() {
         if (top) {
             top->Layout();
             top->Show();
+            top->BringToTop();
         }
     }
-
-    if (top) {
-        top->BringToTop();
-    }
 }
 
 void App::ChangeLayout(ILayoutPtr newLayout) {

src/musikbox/cursespp/DialogOverlay.cpp

@@ -0,0 +1,119 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2007-2016 musikcube team
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//    * Redistributions of source code must retain the above copyright notice,
+//      this list of conditions and the following disclaimer.
+//
+//    * Redistributions in binary form must reproduce the above copyright
+//      notice, this list of conditions and the following disclaimer in the
+//      documentation and/or other materials provided with the distribution.
+//
+//    * Neither the name of the author nor the names of other contributors may
+//      be used to endorse or promote products derived from this software
+//      without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#include "DialogOverlay.h"
+#include "Colors.h"
+#include "Screen.h"
+#include "Text.h"
+
+using namespace cursespp;
+
+#define HORIZONTAL_PADDING 4
+#define VERTICAL_PADDING 2
+
+DialogOverlay::DialogOverlay() {
+    this->SetContentColor(CURSESPP_OVERLAY_BACKGROUND);
+    this->width = this->height = 0;
+}
+
+void DialogOverlay::Layout() { 
+    this->RecalculateSize();
+
+    this->MoveAndResize(
+        HORIZONTAL_PADDING, 
+        VERTICAL_PADDING, 
+        this->width,
+        this->height);
+
+    this->Redraw();
+}
+
+DialogOverlay& DialogOverlay::SetTitle(const std::string& title) {
+    this->title = title;
+    this->RecalculateSize();
+    this->Repaint();
+    return *this;
+}
+
+DialogOverlay& DialogOverlay::SetMessage(const std::string& message) {
+    this->message = message;
+    this->width = 0; /* implicitly triggers a new BreakLines() */
+    this->RecalculateSize();
+    this->Repaint();
+    return *this;
+}
+
+void DialogOverlay::OnVisibilityChanged(bool visible) {
+    if (visible) {
+        this->Redraw();
+    }
+}
+
+void DialogOverlay::RecalculateSize() {
+    int lastWidth = this->width;
+    this->width = std::max(0, Screen::GetWidth() - (HORIZONTAL_PADDING * 2));
+    
+    if (lastWidth != this->width) {
+        /* the "-2" is for left and right padding */
+        messageLines = text::BreakLines(this->message, this->width - 2);
+    }
+
+    this->height = 1; /* top padding */
+    this->height += (this->title.size()) ? 2 : 0;
+    this->height += (this->messageLines.size()) ? messageLines.size() + 1 : 0;
+    this->height += 1; /* shortcuts */
+}
+
+void DialogOverlay::Redraw() {
+    WINDOW* c = this->GetContent();
+
+    const int currentX = 1;
+    int currentY = 1;
+
+    if (this->title.size()) {
+        wmove(c, currentY, currentX);
+        wattron(c, A_BOLD);
+        wprintw(c, text::Ellipsize(this->title, this->width - 2).c_str());
+        wattroff(c, A_BOLD);
+        currentY += 2;
+    }
+
+    if (this->message.size()) {
+        for (size_t i = 0; i < messageLines.size(); i++) {
+            wmove(c, currentY, currentX);
+            wprintw(c, this->messageLines.at(i).c_str());
+            ++currentY;
+        }
+    }
+}

src/musikbox/cursespp/DialogOverlay.h

@@ -0,0 +1,65 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2007-2016 musikcube team
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//    * Redistributions of source code must retain the above copyright notice,
+//      this list of conditions and the following disclaimer.
+//
+//    * Redistributions in binary form must reproduce the above copyright
+//      notice, this list of conditions and the following disclaimer in the
+//      documentation and/or other materials provided with the distribution.
+//
+//    * Neither the name of the author nor the names of other contributors may
+//      be used to endorse or promote products derived from this software
+//      without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "LayoutBase.h"
+#include "TextLabel.h"
+#include <vector>
+
+namespace cursespp {
+    class DialogOverlay :
+        public LayoutBase,
+        public std::enable_shared_from_this<DialogOverlay>
+    {
+        public:
+            DialogOverlay();
+            virtual void Layout();
+
+            DialogOverlay& SetTitle(const std::string& title);
+            DialogOverlay& SetMessage(const std::string& message);
+
+        protected:
+            virtual void OnVisibilityChanged(bool visible);
+
+        private:
+            void Redraw();
+            void RecalculateSize();
+
+            std::string title;
+            std::string message;
+            std::vector<std::string> messageLines;
+            int width, height;
+    };
+}

src/musikbox/cursespp/Overlays.cpp

@@ -33,30 +33,20 @@
 //////////////////////////////////////////////////////////////////////////////
 
 #include "Overlays.h"
-#include "LayoutBase.h"
+#include "DialogOverlay.h"
 #include "Colors.h"
 #include "Screen.h"
 
-#include <iostream>
-
 using namespace cursespp;
 
 static ILayoutPtr none;
 
-class OverlayLayout :
-    public LayoutBase,
-    public std::enable_shared_from_this<OverlayLayout>
-{
-    virtual void Layout() { 
-        this->MoveAndResize(2, 0, Screen::GetWidth() - 4, 8);
-    }
-};
-
-std::shared_ptr<LayoutBase> temp;
+std::shared_ptr<DialogOverlay> temp;
 
 Overlays::Overlays() {
-    temp.reset(new OverlayLayout());
-    temp->SetContentColor(CURSESPP_OVERLAY_BACKGROUND);
+    temp.reset(new DialogOverlay());
+    temp->SetTitle("musikbox")
+        .SetMessage("welcome to musikbox! welcome to musikbox! welcome to musikbox! welcome to musikbox!\n\ntesting line breaks");
 }
 
 ILayoutPtr Overlays::Top() {

src/musikbox/cursespp/Text.cpp

@@ -232,11 +232,14 @@ namespace cursespp {
 
         std::vector<std::string> BreakLines(const std::string& line, size_t width) {
             std::vector<std::string> result;
-            std::vector<std::string> split;
 
-            boost::algorithm::split(split, line, boost::is_any_of("\n"));
-            for (size_t i = 0; i < split.size(); i++) {
-                privateBreakLines(split.at(i), width, result);
+            if (width > 0) {
+                std::vector<std::string> split;
+                boost::algorithm::split(split, line, boost::is_any_of("\n"));
+
+                for (size_t i = 0; i < split.size(); i++) {
+                    privateBreakLines(split.at(i), width, result);
+                }
             }
 
             return result;