Start app rendering.

1 files changed, 127 insertions, 84 deletions

diff --git a/src/bookmouse.cpp b/src/bookmouse.cpp
index 9ba09c4..65184ef 100644
--- a/src/bookmouse.cpp
+++ b/src/bookmouse.cpp
@@ -1,106 +1,149 @@
 #include "bookmouse.hpp"
-#include "main_window.hpp"
+
+#include <SDL_opengl.h>
+#include <fud_array.hpp>
 
 namespace bookmouse {
 
-Bookmouse::Bookmouse()
+Bookmouse::Bookmouse() :
+    m_sdlContext{}, m_mainWindow{m_sdlContext}, m_glContext{m_mainWindow},
+    m_imgui{m_glContext, m_sdlContext, m_mainWindow}
 {
-    m_layout = new QVBoxLayout();
-
-    m_layout->addWidget(&m_pageLeft);
-    m_layout->addWidget(&m_pageRight);
-
-    setLayout(m_layout);
+    /*
+     * Load Fonts
+     *
+     * - If no fonts are loaded, dear imgui will use the default
+     *   font. You can also load multiple fonts and use
+     *   ImGui::PushFont()/PopFont() to select them.
+     * - AddFontFromFileTTF() will return the ImFont* so you can store
+     *   it if you need to select the font among multiple.
+     * - If the file cannot be loaded, the function will return a
+     *   nullptr. Please handle those errors in your application
+     *   (e.g. use an assertion, or display an error and quit).
+     * - The fonts will be rasterized at a given size (w/
+     *   oversampling) and stored into a texture when calling
+     *   ImFontAtlas::Build()/GetTexDataAsXXXX(), which
+     *   ImGui_ImplXXXX_NewFrame below will call.
+     * - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to
+     * - use Freetype for higher quality font rendering.
+     * - Read 'docs/FONTS.md' for more instructions and details.
+     * - Remember that in C/C++ if you want to include a backslash \
+     *   in a string literal you need to write a double backslash \\ !
+     * - Our Emscripten build process allows embedding fonts to be
+     * - accessible at runtime from the "fonts/" folder. See
+     *   Makefile.emscripten for details.
+     * auto imguiIO = m_imgui.getIO();
+     * imguiIO.Fonts->AddFontDefault();
+     * imguiIO.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
+     * imguiIO.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+     * imguiIO.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+     * imguiIO.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+     * ImFont* font = imguiIO.Fonts->AddFontFromFileTTF(
+     *    "c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr,
+     * io.Fonts->GetGlyphRangesJapanese()); IM_ASSERT(font != nullptr);
+     */
 }
 
-void Bookmouse::setArchive(Archive* archive) {
-    if (archive == m_archive) {
-        return;
+int Bookmouse::run()
+{
+    while (m_running) {
+        auto event = pollEvent();
+        static_cast<void>(event);
+
+        constexpr uint32_t delayMillis = 10;
+        if (SDL_GetWindowFlags(m_mainWindow.window()) & SDL_WINDOW_MINIMIZED) {
+            SDL_Delay(delayMillis);
+            continue;
+        }
+        m_imgui.startFrame();
+        updateState();
+        renderFrame();
     }
-    delete(m_archive);
-    m_archive = archive;
-    m_pageNumber = 0;
-    setPages();
+    return 0;
 }
 
-void Bookmouse::next() {
-    auto numPages = m_archive->numPages();
-    size_t increment = 1;
-    if (m_pageLayout != PageLayout::Single) {
-        increment = 2;
-    }
-    if ((m_pageNumber + increment) >= numPages)
-    {
-        return;
+SDL_Event Bookmouse::pollEvent()
+{
+    /*
+     * Poll and handle events (inputs, window resize, etc.)
+     * You can read the io.WantCaptureMouse, io.WantCaptureKeyboard
+     * flags to tell if dear imgui wants to use your inputs.
+     * - When io.WantCaptureMouse is true, do not dispatch mouse input
+     *   data to your main application, or clear/overwrite your copy of
+     *   the mouse data.
+     * - When io.WantCaptureKeyboard is true, do not dispatch keyboard
+     *   input data to your main application, or clear/overwrite your
+     *   copy of the keyboard data.
+     * Generally you may always pass all inputs to dear imgui, and
+     * hide them from your application based on those two flags.
+     */
+    SDL_Event event{};
+    while (SDL_PollEvent(&event)) {
+        static_cast<void>(m_imgui.processEvent(event));
+        if (event.type == SDL_QUIT) {
+            m_running = false;
+        }
+        if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE &&
+            event.window.windowID == SDL_GetWindowID(m_mainWindow.window())) {
+            m_running = false;
+        }
     }
-    m_pageNumber += increment;
-    setPages();
+    return event;
 }
 
-void Bookmouse::back() {
-    auto numPages = m_archive->numPages();
-    size_t decrement = 1;
-    if (m_pageLayout != PageLayout::Single) {
-        decrement = 2;
-    }
-    if (m_pageNumber < decrement)
-    {
-        m_pageNumber = 0;
-        decrement = 0;
+void Bookmouse::updateState()
+{
+    bool my_tool_active{true};
+    ImGui::Begin("My First Tool", &my_tool_active, ImGuiWindowFlags_MenuBar);
+    if (ImGui::BeginMenuBar()) {
+        if (ImGui::BeginMenu("File")) {
+            if (ImGui::MenuItem("Open..", "Ctrl+O")) { /* Do stuff */
+            }
+            if (ImGui::MenuItem("Save", "Ctrl+S")) { /* Do stuff */
+            }
+            if (ImGui::MenuItem("Close", "Ctrl+W")) {
+                my_tool_active = false;
+            }
+            ImGui::EndMenu();
+        }
+        ImGui::EndMenuBar();
     }
-    m_pageNumber -= decrement;
-    setPages();
-}
 
-void Bookmouse::setPages() {
-    m_pageLeft.setPixmap(QPixmap());
-    m_pageRight.setPixmap(QPixmap());
+    // Edit a color stored as 4 floats
+    fud::Array<float, 4> my_color{};
+    ImGui::ColorEdit4("Color", my_color.data());
 
-    switch (m_pageLayout)
-    {
-    case PageLayout::Dual:
-        return setPagesDual();
-    case PageLayout::Manga:
-        return setPagesManga();
-    case PageLayout::Single:
-    default:
-        return setPagesNormal();
+    // Generate samples and plot them
+    float samples[100];
+    for (int idx = 0; idx < 100; idx++) {
+        auto num = static_cast<float>(idx);
+        auto time = static_cast<float>(ImGui::GetTime());
+        samples[idx] = sinf(num * 0.2f + time * 1.5f);
     }
+    ImGui::PlotLines("Samples", samples, 100);
+
+    // Display contents in a scrolling region
+    ImGui::TextColored(ImVec4(1, 1, 0, 1), "Important Stuff");
+    ImGui::BeginChild("Scrolling");
+    for (int n = 0; n < 50; n++)
+        ImGui::Text("%04d: Some text", n);
+    ImGui::EndChild();
+    ImGui::End();
 }
 
-void Bookmouse::setPagesNormal() {
-    auto page1 = m_archive->getPage(m_pageNumber);
-    auto& label1 = m_pageLeft;
-
-    if (page1.isOkay()) {
-        label1.setPixmap(QPixmap::fromImage(page1.getOkay()));
-    }
-}
-
-void Bookmouse::setPagesDual() {
-    auto& label1 = m_pageLeft;
-    auto& label2 = m_pageRight;
-    setPages(label1, label2);
-}
-
-void Bookmouse::setPagesManga() {
-    auto& label1 = m_pageRight;
-    auto& label2 = m_pageLeft;
-    setPages(label1, label2);
-}
-
-void Bookmouse::setPages(QLabel& label1, QLabel& label2) {
-    auto page1 = m_archive->getPage(m_pageNumber);
-    auto page2 = m_archive->getPage(m_pageNumber + 1);
-
-    if (page1.isOkay()) {
-        label1.setPixmap(QPixmap::fromImage(page1.getOkay()));
-    }
-
-
-    if (page2.isOkay()) {
-        label2.setPixmap(QPixmap::fromImage(page1.getOkay()));
-    }
+void Bookmouse::renderFrame()
+{
+    ImGui::Render();
+    const auto& imguiIO = m_imgui.getIO();
+    glViewport(0, 0, static_cast<int>(imguiIO.DisplaySize.x), static_cast<int>(imguiIO.DisplaySize.y));
+    ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
+    glClearColor(
+        clear_color.x * clear_color.w,
+        clear_color.y * clear_color.w,
+        clear_color.z * clear_color.w,
+        clear_color.w);
+    glClear(GL_COLOR_BUFFER_BIT);
+    m_imgui.render();
 }
 
 } // namespace bookmouse