Add a Qt Widgets frontend to xC

This is very much a work in progress, though functional.

Qt Widgets are basically non-working on Android,
though Qt Quick requires a radically different approach.

README.adoc

@@ -33,9 +33,9 @@ including link:xC.adoc#_key_bindings[keyboard shortcuts].
 
 image::xP.webp[align="center"]
 
-xA, xW, xM
+xA, xT, xW, xM
-----------
+--------------
-The native frontends for 'xC'.  Using them is not recommended.
+Other frontends for 'xC'.  Using them is not recommended.
 
 xD
 --

liberty

@@ -1 +1 @@
-Subproject commit 492815c8fc38ad6e333b2f1c5094a329e3076155
+Subproject commit 149938cc445f99b1aa40c490014aad72cf698dec

xT/CMakeLists.txt

@@ -0,0 +1,99 @@
+# As per Qt 6.8 documentation, at least 3.16 is necessary
+cmake_minimum_required (VERSION 3.21.1)
+
+file (READ ../xK-version project_version)
+configure_file (../xK-version xK-version.tag COPYONLY)
+string (STRIP "${project_version}" project_version)
+
+# This is an entirely separate CMake project.
+project (xT VERSION "${project_version}"
+	DESCRIPTION "Qt frontend for xC" LANGUAGES CXX)
+
+set (CMAKE_CXX_STANDARD 17)
+set (CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package (Qt6 REQUIRED COMPONENTS Widgets Network Multimedia)
+qt_standard_project_setup ()
+
+add_compile_options ("$<$<CXX_COMPILER_ID:MSVC>:/utf-8>")
+add_compile_options ("$<$<CXX_COMPILER_ID:GNU>:-Wall;-Wextra>")
+add_compile_options ("$<$<CXX_COMPILER_ID:Clang>:-Wall;-Wextra>")
+
+set (project_config "${PROJECT_BINARY_DIR}/config.h")
+configure_file ("${PROJECT_SOURCE_DIR}/config.h.in" "${project_config}")
+include_directories ("${PROJECT_SOURCE_DIR}" "${PROJECT_BINARY_DIR}")
+
+# Produce a beep sample
+find_program (sox_EXECUTABLE sox REQUIRED)
+set (beep "${PROJECT_BINARY_DIR}/beep.wav")
+add_custom_command (OUTPUT "${beep}"
+	COMMAND ${sox_EXECUTABLE} -b 16 -Dr 44100 -n "${beep}"
+		synth 0.1 0 25 triangle 800 vol 0.5 fade t 0 -0 0.005 pad 0 0.05
+	COMMENT "Generating a beep sample" VERBATIM)
+set_property (SOURCE "${beep}" APPEND PROPERTY QT_RESOURCE_ALIAS beep.wav)
+
+# Rasterize SVG icons
+set (root "${PROJECT_SOURCE_DIR}/..")
+set (CMAKE_MODULE_PATH "${root}/liberty/cmake")
+include (IconUtils)
+
+# It might generally be better to use QtSvg, though it is an extra dependency.
+# The icon_to_png macro is not intended to be used like this.
+foreach (icon xT xT-highlighted)
+	icon_to_png (${icon} "${PROJECT_SOURCE_DIR}/${icon}.svg"
+		48 "${PROJECT_BINARY_DIR}/resources" icon_png)
+	set_property (SOURCE "${icon_png}"
+		APPEND PROPERTY QT_RESOURCE_ALIAS "${icon}.png")
+	list (APPEND icon_rsrc_list "${icon_png}")
+endforeach ()
+
+# The largest size is mainly for an appropriately sized Windows icon
+set (icon_base "${PROJECT_BINARY_DIR}/icons")
+set (icon_png_list)
+foreach (icon_size 16 32 48 256)
+	icon_to_png (xT "${PROJECT_SOURCE_DIR}/xT.svg"
+		${icon_size} "${icon_base}" icon_png)
+	list (APPEND icon_png_list "${icon_png}")
+endforeach ()
+add_custom_target (icons ALL DEPENDS ${icon_png_list})
+if (WIN32)
+	list (REMOVE_ITEM icon_png_list "${icon_png}")
+	set (icon_ico "${PROJECT_BINARY_DIR}/xT.ico")
+	icon_for_win32 ("${icon_ico}" "${icon_png_list}" "${icon_png}")
+
+	set (resource_file "${PROJECT_BINARY_DIR}/xT.rc")
+	list (APPEND project_sources "${resource_file}")
+	add_custom_command (OUTPUT "${resource_file}"
+		COMMAND ${CMAKE_COMMAND} -E echo "1 ICON \"xT.ico\""
+			> ${resource_file} VERBATIM)
+	set_property (SOURCE "${resource_file}"
+		APPEND PROPERTY OBJECT_DEPENDS ${icon_ico})
+endif ()
+
+# Build the main executable and link it
+find_program (awk_EXECUTABLE awk ${find_program_REQUIRE})
+add_custom_command (OUTPUT xC-proto.cpp
+	COMMAND ${CMAKE_COMMAND} -E env LC_ALL=C ${awk_EXECUTABLE}
+		-f ${root}/liberty/tools/lxdrgen.awk
+		-f ${root}/liberty/tools/lxdrgen-cpp.awk
+		-v PrefixCamel=Relay
+		${root}/xC.lxdr > xC-proto.cpp
+	DEPENDS
+		${root}/liberty/tools/lxdrgen.awk
+		${root}/liberty/tools/lxdrgen-cpp.awk
+		${root}/xC.lxdr
+	COMMENT "Generating xC relay protocol code" VERBATIM)
+add_custom_target (xC-proto DEPENDS ${PROJECT_BINARY_DIR}/xC-proto.cpp)
+
+list (APPEND project_sources "${root}/liberty/tools/lxdrgen-cpp-qt.cpp")
+qt_add_executable (xT xT.cpp ${project_config} ${project_sources})
+add_dependencies (xT xC-proto)
+qt_add_resources (xT "rsrc" PREFIX / FILES "${beep}" ${icon_rsrc_list})
+target_link_libraries (xT PRIVATE Qt6::Widgets Qt6::Network Qt6::Multimedia)
+set_target_properties (xT PROPERTIES WIN32_EXECUTABLE ON MACOSX_BUNDLE ON)
+
+# At least with MinGW, this is a fully independent portable executable
+# TODO(p): Figure this out once it builds.
+install (TARGETS xT DESTINATION .)
+set (CPACK_GENERATOR ZIP)
+include (CPack)

xT/config.h.in

@@ -0,0 +1,7 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define PROJECT_NAME        "${PROJECT_NAME}"
+#define PROJECT_VERSION     "${project_version}"
+
+#endif  // ! CONFIG_H

xT/xT-highlighted.svg

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg version="1.1" width="48" height="48" viewBox="0 0 48 48"
+   xmlns="http://www.w3.org/2000/svg">
+
+  <defs>
+    <radialGradient id="green-x">
+      <stop stop-color="hsl(66, 100%, 80%)" offset="0" />
+      <stop stop-color="hsl(66, 100%, 50%)" offset="1" />
+    </radialGradient>
+    <radialGradient id="orange">
+      <stop stop-color="hsl(36, 100%, 60%)" offset="0" />
+      <stop stop-color="hsl(23, 100%, 60%)" offset="1" />
+    </radialGradient>
+    <filter id="shadow" x="-50%" y="-50%" width="200%" height="200%">
+      <feDropShadow dx="0" dy="0" stdDeviation="0.05"
+         flood-color="rgba(0, 0, 0, .5)" />
+    </filter>
+  </defs>
+
+  <!-- XXX: librsvg screws up shadows on rotated objects. -->
+  <g filter="url(#shadow)" transform="translate(24 3) scale(16)">
+    <path fill="url(#orange)" stroke="hsl(36, 100%, 20%)" stroke-width="0.1"
+       d="M-.8 0 H.8 V.5 H.25 V2.625 H-.25 V.5 H-.8 Z" />
+  </g>
+  <g filter="url(#shadow)" transform="translate(24 28) rotate(-45) scale(16)">
+    <path fill="url(#green-x)" stroke="hsl(66, 100%, 20%)" stroke-width="0.1"
+       d="M-.25 -1 H.25 V-.25 H1 V.25 H.25 V1 H-.25 V.25 H-1 V-.25 H-.25 Z" />
+  </g>
+</svg>

xT/xT.desktop

@@ -0,0 +1,8 @@
+[Desktop Entry]
+Type=Application
+Name=xT
+GenericName=IRC Client
+Icon=xT
+Exec=xT
+StartupNotify=false
+Categories=Network;Chat;IRCClient;

xT/xT.svg

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg version="1.1" width="48" height="48" viewBox="0 0 48 48"
+   xmlns="http://www.w3.org/2000/svg">
+
+  <defs>
+    <radialGradient id="grey-x">
+      <stop stop-color="hsl(66, 0%, 90%)" offset="0" />
+      <stop stop-color="hsl(66, 0%, 80%)" offset="1" />
+    </radialGradient>
+    <radialGradient id="orange">
+      <stop stop-color="hsl(36, 100%, 60%)" offset="0" />
+      <stop stop-color="hsl(23, 100%, 60%)" offset="1" />
+    </radialGradient>
+    <filter id="shadow" x="-50%" y="-50%" width="200%" height="200%">
+      <feDropShadow dx="0" dy="0" stdDeviation="0.05"
+         flood-color="rgba(0, 0, 0, .5)" />
+    </filter>
+  </defs>
+
+  <!-- XXX: librsvg screws up shadows on rotated objects. -->
+  <g filter="url(#shadow)" transform="translate(24 28) rotate(-45) scale(16)">
+    <path fill="url(#grey-x)" stroke="hsl(66, 0%, 30%)" stroke-width="0.1"
+       d="M-.25 -1 H.25 V-.25 H1 V.25 H.25 V1 H-.25 V.25 H-1 V-.25 H-.25 Z" />
+  </g>
+  <g filter="url(#shadow)" transform="translate(24 3) scale(16)">
+    <path fill="url(#orange)" stroke="hsl(36, 100%, 20%)" stroke-width="0.1"
+       d="M-.8 0 H.8 V.5 H.25 V2.625 H-.25 V.5 H-.8 Z" />
+  </g>
+</svg>