Add Keyboard input and enter support for text editor.

apps/sample-gui/text_editor/TextEditorView.cpp

@@ -25,6 +25,7 @@ void TextEditorView::Initialize()
     label->setMargin(1);
 
     auto textBox = TextBox::Create();
+    textBox->setName("Text Box");
     mTextBox = textBox.get();
 
     auto saveButton = Button::Create();

src/client/TabbedPanelWidget.cpp

@@ -49,6 +49,8 @@ void TabbedPanelWidget::addPanel(WidgetUPtr panel, const std::string& label)
     button->setOnClickFunction(onClick);
 
     mStack->addWidget(std::move(panel));
+    mStack->showChild(rawPanel);
+
     mNavPanel->addWidget(std::move(button));
 }
 

src/core/StringUtils.cpp

@@ -20,6 +20,17 @@ bool StringUtils::IsSpace(char c)
     return std::isspace(c, loc);
 }
 
+std::vector<std::string> StringUtils::toLines(const std::string& input)
+{
+    auto result = std::vector<std::string>{};
+    auto ss = std::stringstream{input};
+    for (std::string line; std::getline(ss, line, '\n');)
+    {
+        result.push_back(line);
+    }
+    return result;
+}
+
 std::string StringUtils::strip(const std::string& input)
 {
     if (input.empty())

src/core/StringUtils.h

@@ -23,5 +23,8 @@ public:
     static std::string ToPaddedString(unsigned numBytes, unsigned entry);
     static std::vector<std::string> split(const std::string& input);
     static std::string strip(const std::string& input);
+
+    static std::vector<std::string> toLines(const std::string& input);
+
     static std::string stripQuotes(const std::string& input);
 };

src/fonts/FontItem.h

@@ -38,6 +38,17 @@ public:
         return mSize;
     }
 
+    bool operator==(const FontItem& rhs) const
+    {
+       return (mSize == rhs.mSize)
+       && (mFaceName == rhs.mFaceName);
+    }
+
+    bool operator!=(const FontItem& rhs) const
+    {
+      return !operator==(rhs);
+    }
+
 private:
     unsigned mSize{16};
     std::string mFaceName;

src/graphics/opengl/OpenGlTextPainter.cpp

@@ -44,7 +44,9 @@ void OpenGlTextPainter::initializeShader()
 
 void OpenGlTextPainter::initializeTextures(const TextData& textData, DrawingContext* context)
 {
-    for (auto c : textData.mContent)
+    for (auto line : textData.mLines)
+    {
+        for (auto c : line)
         {
             if (auto iter = mFontTextures.find(c); iter == mFontTextures.end())
             {
@@ -53,6 +55,7 @@ void OpenGlTextPainter::initializeTextures(const TextData& textData, DrawingCont
                 mFontTextures[c] = std::move(new_texture);
             }
         }
+    }
 }
 
 void OpenGlTextPainter::initializeBuffers()
@@ -104,9 +107,13 @@ void OpenGlTextPainter::paint(SceneText* text, DrawingContext* context)
 
     auto transform = text->getTransform();
 
+    float line_delta = 20;
+    float line_offset = 0;
+    for (auto line : text_data.mLines)
+    {
         float x = transform.getLocation().getX();
-    const float y = height - transform.getLocation().getY();
-    for (auto c :  text_data.mContent)
+        const float y = height - line_offset - transform.getLocation().getY();
+        for (auto c :  line)
         {
             auto texture = mFontTextures[c].get();
 
@@ -136,6 +143,9 @@ void OpenGlTextPainter::paint(SceneText* text, DrawingContext* context)
             x += (texture->getGlyph()->getAdvanceX() >> 6); // bitshift by 6 to get value in pixels (2^6 = 64)
         }
 
+        line_offset += line_delta;
+    }
+
     glBindVertexArray(0);
     glBindTexture(GL_TEXTURE_2D, 0);
 }

src/ui_elements/desktop_elements/Keyboard.cpp

@@ -10,3 +10,13 @@ std::unique_ptr<Keyboard> Keyboard::Create()
     return std::make_unique<Keyboard>();
 }
 
+std::string Keyboard::getKeyString(KeyCode code)
+{
+    return "";
+}
+
+Keyboard::Function Keyboard::getFunction(KeyCode code)
+{
+    return Function::UNSET;
+}
+

src/ui_elements/desktop_elements/Keyboard.h

@@ -6,6 +6,15 @@
 class Keyboard
 {
 public:
+
+    enum class Function
+    {
+        UNSET,
+        ENTER,
+        BACKSPACE,
+        TAB
+    };
+
     using KeyCode = unsigned;
     using KeyState = unsigned;
 
@@ -16,10 +25,10 @@ public:
 
     static std::unique_ptr<Keyboard> Create();
 
-    virtual std::string getKeyString(KeyCode code)
-    {
-        return "";
-    }
+    virtual std::string getKeyString(KeyCode code);
+
+    virtual Function getFunction(KeyCode code);
+
 };
 
 using KeyboardUPtr = std::unique_ptr<Keyboard>;

src/ui_elements/ui_events/KeyboardEvent.cpp

@@ -18,22 +18,37 @@ std::unique_ptr<KeyboardEvent> KeyboardEvent::Create()
     return std::make_unique<KeyboardEvent>();
 }
 
-void KeyboardEvent::SetKeyString(const std::string& key)
+void KeyboardEvent::setKeyString(const std::string& key)
 {
     mKeyString = key;
 }
 
-std::string KeyboardEvent::GetKeyString() const
+std::string KeyboardEvent::getKeyString() const
 {
     return mKeyString;
 }
 
-void KeyboardEvent::SetAction(Action action)
+void KeyboardEvent::setAction(Action action)
 {
     mAction = action;
 }
 
-KeyboardEvent::Action KeyboardEvent::GetAction() const
+KeyboardEvent::Action KeyboardEvent::getAction() const
 {
     return mAction;
 }
+
+bool KeyboardEvent::isFunctionKey() const
+{
+    return mFunction != Keyboard::Function::UNSET;
+}
+
+Keyboard::Function KeyboardEvent::getFunction() const
+{
+    return mFunction;
+}
+
+void KeyboardEvent::setFunction(Keyboard::Function function)
+{
+    mFunction = function;
+}

src/ui_elements/ui_events/KeyboardEvent.h

@@ -4,6 +4,7 @@
 #include <string>
 
 #include "UiEvent.h"
+#include "Keyboard.h"
 
 class KeyboardEvent : public UiEvent
 {
@@ -14,11 +15,6 @@ public:
         Released
     };
 
-private:
-
-    Action mAction;
-    std::string mKeyString;
-
 public:
 
     KeyboardEvent();
@@ -27,13 +23,25 @@ public:
 
     static std::unique_ptr<KeyboardEvent> Create();
 
-    void SetKeyString(const std::string& key);
+    void setKeyString(const std::string& key);
 
-    std::string GetKeyString() const;
+    std::string getKeyString() const;
 
-    void SetAction(Action action);
+    void setAction(Action action);
 
-    Action GetAction() const;
+    Action getAction() const;
+
+    bool isFunctionKey() const;
+
+    Keyboard::Function getFunction() const;
+
+    void setFunction(Keyboard::Function function);
+
+private:
+
+    Keyboard::Function mFunction{Keyboard::Function::UNSET};
+    Action mAction;
+    std::string mKeyString;
 
 };
 using KeyboardEventUPtr = std::unique_ptr<KeyboardEvent>;

src/ui_elements/widgets/Button.cpp

@@ -75,12 +75,16 @@ void Button::updateLabel(const PaintEvent* event)
         mTextNode = TextNode::Create(mLabel, middle);
         mTextNode->setName(mName + "_TextNode");
         mTextNode->setContent(mLabel);
+        mTextNode->setWidth(mSize.mWidth);
+        mTextNode->setHeight(mSize.mHeight);
         mRootNode->addChild(mTextNode.get());
     }
 
     if (mTransformDirty)
     {
         mTextNode->setLocation(middle);
+        mTextNode->setWidth(mSize.mWidth);
+        mTextNode->setHeight(mSize.mHeight);
     }
 
     if (mMaterialDirty)

src/ui_elements/widgets/Label.cpp

@@ -44,6 +44,8 @@ void Label::updateLabel(const PaintEvent* event)
     if (!mTextNode)
     {
         mTextNode = TextNode::Create(mLabel, middle);
+        mTextNode->setWidth(mSize.mWidth);
+        mTextNode->setHeight(mSize.mHeight);
         mRootNode->addChild(mTextNode.get());
     }
 
@@ -55,6 +57,8 @@ void Label::updateLabel(const PaintEvent* event)
     if (mTransformDirty)
     {
         mTextNode->setLocation(middle);
+        mTextNode->setWidth(mSize.mWidth);
+        mTextNode->setHeight(mSize.mHeight);
     }
 
     if (mContentDirty)

src/ui_elements/widgets/TextBox.cpp

@@ -13,7 +13,7 @@ TextBox::TextBox()
       mCaps(false)
 {
     mBackgroundColor = Color(250, 250, 250);
-    mPadding = {10, 0, 10, 0};
+    mPadding = {20, 0, 20, 0};
 }
 
 std::unique_ptr<TextBox> TextBox::Create()
@@ -40,72 +40,28 @@ void TextBox::appendContent(const std::string& text)
 
 bool TextBox::onMyKeyboardEvent(const KeyboardEvent* event)
 {
-    if(!event) return false;
+    if(!event or !mVisible) return false;
 
-    const auto keyString = event->GetKeyString();
-    if (keyString == "KEY_RETURN")
+    if(event->isFunctionKey())
+    {
+        if (event->getFunction() == Keyboard::Function::ENTER)
         {
             appendContent("\n");
         }
-    else if (keyString == "KEY_BACK")
+        else if(event->getFunction() == Keyboard::Function::BACKSPACE)
         {
             mContent = mContent.substr(0, mContent.size()-1);
+            mContentDirty = true;
         }
-    else if (keyString == "KEY_SPACE")
-    {
-        appendContent(" ");
-    }
-    else if (keyString == "KEY_CAPS")
-    {
-        mCaps = !mCaps;
-    }
-    else
-    {
-        if (mCaps && !keyString.empty())
-        {
-            const char c = std::toupper(keyString[0]);
-            appendContent(std::string(&c));
     }
     else
     {
+        const auto keyString = event->getKeyString();
         appendContent(keyString);
     }
-    }
     return true;
 }
 
-/*
-void TextBox::onPaintEvent(const PaintEvent* event)
-{
-    mMyLayers.clear();
-    addBackground(event);
-
-    double offset = 0;
-    if(!mContent.empty())
-    {
-        std::stringstream stream(mContent);
-        std::string segment;
-        std::vector<std::string> seglist;
-        while(std::getline(stream, segment, '\n'))
-        {
-           seglist.push_back(segment);
-        }
-        for(const auto& line : seglist)
-        {
-            auto loc = DiscretePoint(mLocation.GetX() + mPadding.mLeft,
-                    mLocation.GetY() + mPadding.mTop + unsigned(offset));
-            auto textLayer = VisualLayer::Create();
-            auto textElement = TextNode::Create(line, loc);
-            textElement->setFillColor(mBackgroundColor);
-            textLayer->setTextNode(std::move(textElement));
-            mMyLayers.push_back(std::move(textLayer));
-            offset += 20;
-        }
-    }
-    addMyLayers();
-}
-*/
-
 bool TextBox::isDirty() const
 {
     return Widget::isDirty() || mContentDirty;
@@ -119,12 +75,13 @@ void TextBox::doPaint(const PaintEvent* event)
 
 void TextBox::updateLabel(const PaintEvent* event)
 {
-    unsigned fontOffset = unsigned(mContent.size()) * 4;
-    auto middle = DiscretePoint(mLocation.GetX() + mSize.mWidth/2 - fontOffset, mLocation.GetY() + mSize.mHeight/2 + 4);
+    auto loc = DiscretePoint(mLocation.GetX() + mPadding.mLeft, mLocation.GetY() + mPadding.mTop + unsigned(0));
 
     if (!mTextNode)
     {
-        mTextNode = TextNode::Create(mContent, middle);
+        mTextNode = TextNode::Create(mContent, loc);
+        mTextNode->setWidth(mSize.mWidth);
+        mTextNode->setHeight(mSize.mHeight);
         mRootNode->addChild(mTextNode.get());
     }
 
@@ -133,6 +90,13 @@ void TextBox::updateLabel(const PaintEvent* event)
         mTextNode->setFillColor(mBackgroundColor);
     }
 
+    if (mTransformDirty)
+    {
+        mTextNode->setLocation(loc);
+        mTextNode->setWidth(mSize.mWidth);
+        mTextNode->setHeight(mSize.mHeight);
+    }
+
     if (mContentDirty)
     {
         mTextNode->setContent(mContent);

src/ui_elements/widgets/Widget.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "DiscretePoint.h"
+#include "FontItem.h"
 #include "Color.h"
 
 #include <memory>
@@ -149,6 +150,8 @@ protected:
 
     std::string mName;
     std::vector<TransformNode*> mPendingChildNodes;
+
+    FontItem mDefaultFont;
 };
 
 using WidgetUPtr = std::unique_ptr<Widget>;

src/visual_elements/SceneText.cpp

@@ -15,11 +15,11 @@ const TextData& SceneText::getTextData() const
     return mTextData;
 }
 
-void SceneText::setContent(const std::string& content)
+void SceneText::setTextData(const TextData& data)
 {
-    if (mTextData.mContent != content)
+    if (mTextData != data)
     {
         mTextGeometryIsDirty = true;
-        mTextData.mContent = content;
+        mTextData = data;
     }
 }

src/visual_elements/SceneText.h

@@ -12,7 +12,7 @@ public:
 
     const TextData& getTextData() const;
 
-    void setContent(const std::string& content);
+    void setTextData(const TextData& content);
 
 private:
     bool mTextGeometryIsDirty{true};

src/visual_elements/TextData.h

@@ -3,10 +3,27 @@
 #include "Color.h"
 #include "FontItem.h"
 
+#include <vector>
+
 class TextData
 {
+public:
+    bool operator==(const TextData& rhs) const
+    {
+       return (mContent == rhs.mContent)
+       && (mLines == rhs.mLines)
+       && (mFont == rhs.mFont);
+    }
+
+    bool operator!=(const TextData& rhs) const
+    {
+      return !operator==(rhs);
+    }
+
+
 public:
     TextData() = default;
     std::string mContent;
+    std::vector<std::string> mLines;
     FontItem mFont;
 };

src/visual_elements/TextNode.cpp

@@ -5,17 +5,20 @@
 #include "IFontEngine.h"
 #include "MeshPrimitives.h"
 #include "FontItem.h"
+#include "FontGlyph.h"
 
 #include "SceneText.h"
 
 #include "Color.h"
 
+#include "StringUtils.h"
+
 #include <iostream>
 
 TextNode::TextNode(const std::string& content, const DiscretePoint& loc)
     :   MaterialNode(loc)
 {
-    mContent= content;
+    mTextData.mContent= content;
 }
 
 TextNode::~TextNode()
@@ -35,18 +38,82 @@ std::string TextNode::getFontLabel() const
 
 std::string TextNode::getContent() const
 {
-    return mContent;
+    return mTextData.mContent;
+}
+
+unsigned TextNode::getWidth() const
+{
+    return mWidth;
+}
+
+unsigned TextNode::getHeight() const
+{
+    return mHeight;
+}
+
+void TextNode::setWidth(unsigned width)
+{
+    if (mWidth != width)
+    {
+        mTransformIsDirty = true;
+        mWidth = width;
+    }
+}
+
+void TextNode::setHeight(unsigned height)
+{
+    if (mHeight != height)
+    {
+        mTransformIsDirty = true;
+        mHeight = height;
+    }
 }
 
 void TextNode::setContent(const std::string& content)
 {
-    if (mContent != content)
+    if (mTextData.mContent != content)
     {
-        mContent = content;
+        mTextData.mContent = content;
         mContentIsDirty = true;
     }
 }
 
+void TextNode::updateLines(FontsManager* fontsManager)
+{
+    auto original_count = mTextData.mLines.size();
+    std::vector<std::string> lines = StringUtils::toLines(mTextData.mContent);
+    std::vector<std::string> output_lines;
+    for (auto line : lines)
+    {
+        double running_width{0};
+        std::string working_line;
+        for (auto c : line)
+        {
+            auto glyph_advance = fontsManager->getGlyph(mTextData.mFont.getFaceName(), mTextData.mFont.getSize(), c)->getAdvanceX();
+            if (false)
+            //if (running_width + glyph_advance > mWidth)
+            {
+                output_lines.push_back(working_line);
+                working_line = c;
+                running_width = glyph_advance;
+            }
+            else
+            {
+                working_line += c;
+                running_width += glyph_advance;
+            }
+        }
+        output_lines.push_back(working_line);
+        running_width = 0;
+    }
+    mTextData.mLines = output_lines;
+
+    if (original_count != mTextData.mLines.size())
+    {
+        mLinesAreDirty = true;
+    }
+}
+
 void TextNode::update(FontsManager* fontsManager)
 {
     if (!mSceneItem)
@@ -55,10 +122,16 @@ void TextNode::update(FontsManager* fontsManager)
         mSceneItem->setName(mName + "_SceneText");
     }
 
-    if (mContentIsDirty)
+    if (mTransformIsDirty || mContentIsDirty)
     {
-        dynamic_cast<SceneText*>(mSceneItem.get())->setContent(mContent);
+        updateLines(fontsManager);
+    }
+
+    if (mContentIsDirty || mLinesAreDirty)
+    {
+        dynamic_cast<SceneText*>(mSceneItem.get())->setTextData(mTextData);
         mContentIsDirty = false;
+        mLinesAreDirty = false;
     }
 
     if (mTransformIsDirty)

src/visual_elements/TextNode.h

@@ -20,12 +20,25 @@ public:
     std::string getContent() const;
     std::string getFontLabel() const;
 
+    unsigned getWidth() const;
+    unsigned getHeight() const;
+
+    void setWidth(unsigned width);
+    void setHeight(unsigned height);
+
     void setContent(const std::string& content);
 
     void update(FontsManager* fontsManager) override;
 private:
-    std::string mContent;
+
+    void updateLines(FontsManager* fontsManager);
+
+    TextData mTextData;
     bool mContentIsDirty{true};
+    bool mLinesAreDirty{true};
+
+    unsigned mWidth{1};
+    unsigned mHeight{1};
 };
 
 using TextNodetr = std::unique_ptr<TextNode>;

src/windows/ui_interfaces/x11/XcbEventInterface.cpp

@@ -16,16 +16,32 @@ std::unique_ptr<XcbEventInterface> XcbEventInterface::Create()
 std::unique_ptr<KeyboardEvent> XcbEventInterface::ConvertKeyPress(xcb_key_press_event_t* event, Keyboard* keyboard) const
 {
     auto ui_event = KeyboardEvent::Create();
-    ui_event->SetAction(KeyboardEvent::Action::Pressed);
-    ui_event->SetKeyString(keyboard->getKeyString(event->detail));
+    ui_event->setAction(KeyboardEvent::Action::Pressed);
+
+    if (auto function = keyboard->getFunction(event->detail); function != Keyboard::Function::UNSET)
+    {
+        ui_event->setFunction(function);
+    }
+    else
+    {
+        ui_event->setKeyString(keyboard->getKeyString(event->detail));
+    }
     return ui_event;
 }
 
 std::unique_ptr<KeyboardEvent> XcbEventInterface::ConvertKeyRelease(xcb_key_press_event_t* event, Keyboard* keyboard) const
 {
     auto ui_event = KeyboardEvent::Create();
-    ui_event->SetAction(KeyboardEvent::Action::Released);
-    ui_event->SetKeyString(keyboard->getKeyString(event->detail));
+    ui_event->setAction(KeyboardEvent::Action::Released);
+
+    if (auto function = keyboard->getFunction(event->detail); function != Keyboard::Function::UNSET)
+    {
+        ui_event->setFunction(function);
+    }
+    else
+    {
+        ui_event->setKeyString(keyboard->getKeyString(event->detail));
+    }
     return ui_event;
 }
 

src/windows/ui_interfaces/x11/XcbExtensionInterface.h

@@ -8,7 +8,6 @@
 class XcbExtensionInterface
 {
 public:
-
     void initialize(xcb_connection_t* connection);
 
     bool isXkBEvent(unsigned responseType) const;

src/windows/ui_interfaces/x11/XcbKeyboard.cpp

@@ -34,6 +34,25 @@ void XcbKeyboard::updateState(xcb_xkb_state_notify_event_t *state)
                                       state->lockedGroup);
 }
 
+Keyboard::Function XcbKeyboard::getFunction(Keyboard::KeyCode code)
+{
+    if (!mXkbState)
+    {
+        getKeyMap();
+    }
+
+    xkb_keysym_t sym = xkb_state_key_get_one_sym(mXkbState, code);
+    if (sym == XKB_KEY_Return)
+    {
+        return Keyboard::Function::ENTER;
+    }
+    else if(sym == XKB_KEY_BackSpace)
+    {
+        return Keyboard::Function::BACKSPACE;
+    }
+    return Keyboard::Function::UNSET;
+}
+
 std::string XcbKeyboard::getKeyString(KeyCode keyCode)
 {
     if (!mXkbState)

src/windows/ui_interfaces/x11/XcbKeyboard.h

@@ -15,6 +15,8 @@ public:
 
     std::string getKeyString(KeyCode keyCode) override;
 
+    Function getFunction(KeyCode code) override;
+
     void updateState(xcb_xkb_state_notify_event_t *state);
 
 private: