Extract imgui demo class into a file

src/debug_imgui_demo.cpp

@@ -0,0 +1,143 @@
+#include "debug_imgui_demo.h"
+
+#include <imgui/imgui.h>
+
+#include "cata_imgui.h"
+#include "ui_manager.h"
+#include "input_context.h"
+#include "translations.h"
+
+
+debug_imgui_demo_ui::debug_imgui_demo_ui() :
+    cataimgui::window( _( "ImGui Demo Screen" ) )
+{
+
+    // char *text = "Some long text that will wrap around nicely. </color> <color_green><color_red>Some red text in the </color>middle.</color>  Some long text that will <color_light_blue_yellow>wrap around nicely.";
+    std::string text =
+        "Some long text that will wrap around nicely.  <color_red>Some red text in the middle.</color>  Some long text that will wrap around nicely.";
+    stuff = std::make_shared<cataimgui::Paragraph>();
+    stuff->append_colored_text( text, c_white );
+
+}
+cataimgui::bounds debug_imgui_demo_ui::get_bounds()
+{
+    // return { 0.0f, 0.0f, 0.0f, 0.0f };
+    return { -1.f, -1.f, ImGui::GetMainViewport()->Size.x, ImGui::GetMainViewport()->Size.y };
+}
+
+static void draw_lorem( const std::shared_ptr<cataimgui::Paragraph> &stuff )
+{
+
+#ifdef TUI
+    ImGui::SetNextWindowPos( { 0, 0 }, ImGuiCond_Once );
+    ImGui::SetNextWindowSize( { 60, 40 }, ImGuiCond_Once );
+#else
+    ImGui::SetNextWindowSize( { 620, 900 }, ImGuiCond_Once );
+#endif
+    if( ImGui::Begin( "test" ) ) {
+#ifdef TUI
+        static float wrap_width = 50.0f;
+        ImGui::SliderFloat( "Wrap width", &wrap_width, 1, 60, "%.0f" );
+        float marker_size = 0.0f;
+#else
+        static float wrap_width = 200.0f;
+        ImGui::SliderFloat( "Wrap width", &wrap_width, -20, 600, "%.0f" );
+        float marker_size = ImGui::GetTextLineHeight();
+#endif
+
+#define WRAP_START()                                                           \
+    ImDrawList *draw_list = ImGui::GetWindowDrawList();                        \
+    ImVec2 pos = ImGui::GetCursorScreenPos();                                  \
+    ImVec2 marker_min = ImVec2(pos.x + wrap_width, pos.y);                     \
+    ImVec2 marker_max =                                                        \
+            ImVec2(pos.x + wrap_width + marker_size, pos.y + marker_size);         \
+    ImGui::PushTextWrapPos(ImGui::GetCursorPos().x + wrap_width);
+
+#define WRAP_END()                                                             \
+    draw_list->AddRectFilled(marker_min, marker_max,                           \
+                             IM_COL32(255, 0, 255, 255));                      \
+    ImGui::PopTextWrapPos();
+
+        // three sentences in a nicely–wrapped paragraph
+        if( ImGui::CollapsingHeader( "Plain wrapped text" ) ) {
+            WRAP_START();
+            ImGui::TextWrapped( "%s",
+                                "Some long text that will wrap around nicely.  Some red text in the middle.  Some long text that will wrap around nicely." );
+            WRAP_END();
+            ImGui::NewLine();
+        }
+
+        if( ImGui::CollapsingHeader( "Styled Paragraph" ) ) {
+            WRAP_START();
+            cataimgui::TextStyled( stuff, wrap_width );
+            WRAP_END();
+            ImGui::NewLine();
+        }
+
+        if( ImGui::CollapsingHeader( "Unstyled Paragraph" ) ) {
+            WRAP_START();
+            cataimgui::TextUnstyled( stuff, wrap_width );
+            WRAP_END();
+            ImGui::NewLine();
+        }
+
+        if( ImGui::CollapsingHeader( "Styled Paragraph, no allocations" ) ) {
+            WRAP_START();
+            cataimgui::TextParagraph( c_white, "Some long text that will wrap around nicely.", wrap_width );
+            cataimgui::TextParagraph( c_red, "  Some red text in the middle.", wrap_width );
+            cataimgui::TextParagraph( c_white, "  Some long text that will wrap around nicely.", wrap_width );
+            ImGui::NewLine();
+            WRAP_END();
+            ImGui::NewLine();
+        }
+
+        if( ImGui::CollapsingHeader( "Naive attempt" ) ) {
+            WRAP_START();
+            // same three sentences, but the color breaks the wrapping
+            ImGui::TextUnformatted( "Some long text that will wrap around nicely." );
+            ImGui::SameLine();
+            ImGui::TextColored( c_red, "%s", "Some red text in the middle." );
+            ImGui::SameLine();
+            ImGui::TextUnformatted( "Some long text that will wrap around nicely." );
+            WRAP_END();
+        }
+    }
+    ImGui::End();
+}
+
+void debug_imgui_demo_ui::draw_controls()
+{
+#ifndef TUI
+    ImGui::ShowDemoWindow();
+#endif
+    draw_lorem( stuff );
+}
+
+void debug_imgui_demo_ui::init()
+{
+    // The demo makes it's own screen.  Don't get in the way
+    force_to_back = true;
+}
+
+void debug_imgui_demo_ui::run()
+{
+    init();
+
+    input_context ctxt( "HELP_KEYBINDINGS" );
+    ctxt.register_action( "QUIT" );
+    ctxt.register_action( "SELECT" );
+    ctxt.register_action( "MOUSE_MOVE" );
+    ctxt.register_action( "ANY_INPUT" );
+    ctxt.register_action( "HELP_KEYBINDINGS" );
+    std::string action;
+
+    ui_manager::redraw();
+
+    while( is_open ) {
+        ui_manager::redraw();
+        action = ctxt.handle_input( 5 );
+        if( action == "QUIT" ) {
+            break;
+        }
+    }
+}

src/debug_imgui_demo.h

@@ -0,0 +1,24 @@
+#pragma once
+#ifndef CATA_SRC_DEBUG_IMGUI_DEMO_H
+#define CATA_SRC_DEBUG_IMGUI_DEMO_H
+
+#include "cata_imgui.h"
+
+class debug_imgui_demo_ui : public cataimgui::window
+{
+    public:
+        debug_imgui_demo_ui();
+        void init();
+        void run();
+
+    protected:
+        void draw_controls() override;
+        cataimgui::bounds get_bounds() override;
+        void on_resized() override {
+            init();
+        };
+    private:
+        std::shared_ptr<cataimgui::Paragraph> stuff;
+};
+
+#endif // CATA_SRC_DEBUG_IMGUI_DEMO_H

src/debug_menu.cpp

@@ -48,6 +48,7 @@
 #include "creature_tracker.h"
 #include "cursesdef.h"
 #include "debug.h"
+#include "debug_imgui_demo.h"
 #include "dialogue.h"
 #include "dialogue_chatbin.h"
 #include "dialogue_helpers.h"
@@ -3777,63 +3778,11 @@ static void wind_speed()
     }
 }
 
-class demo_ui : public cataimgui::window
-{
-    public:
-        demo_ui();
-        void init();
-        void run();
-
-    protected:
-        void draw_controls() override;
-        cataimgui::bounds get_bounds() override;
-        void on_resized() override {
-            init();
-        };
-};
-demo_ui::demo_ui() : cataimgui::window( _( "ImGui Demo Screen" ) ) {}
-cataimgui::bounds demo_ui::get_bounds()
-{
-    return { 0.0f, 0.0f, 0.0f, 0.0f };
-}
-void demo_ui::draw_controls()
-{
-#ifndef TUI
-    ImGui::ShowDemoWindow();
-#endif
-}
-void demo_ui::init()
-{
-    // The demo makes it's own screen.  Don't get in the way
-    force_to_back = true;
-}
-
-void demo_ui::run()
-{
-    init();
-
-    input_context ctxt( "HELP_KEYBINDINGS" );
-    ctxt.register_action( "QUIT" );
-    ctxt.register_action( "SELECT" );
-    ctxt.register_action( "MOUSE_MOVE" );
-    ctxt.register_action( "ANY_INPUT" );
-    ctxt.register_action( "HELP_KEYBINDINGS" );
-    std::string action;
-
-    ui_manager::redraw();
 
-    while( is_open ) {
-        ui_manager::redraw();
-        action = ctxt.handle_input( 5 );
-        if( action == "QUIT" ) {
-            break;
-        }
-    }
-}
 
 static void run_imgui_demo()
 {
-    demo_ui demo;
+    debug_imgui_demo_ui demo;
     demo.run();
 }