35 lines
1.8 KiB
CMake
35 lines
1.8 KiB
CMake
# The GTK4 adapter: a GtkGLArea whose own framebuffer the plot is rendered into
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# and driven from GTK's gestures and event controllers. GTK is a C library whose
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# GL widget cannot be subclassed from C++ (`G_DEFINE_TYPE` declares the type's
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# instance and class structs), so the adapter is a factory that builds an instance
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# and wraps it -- the shape the header documents.
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#
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# Unlike GLFW and ImGui -- and like Qt -- this is not a fetched dependency: GTK4
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# is a system SDK, and a project that enables this target is asking for the
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# installed one. Discovery is pkg-config, and a missing GTK4 fails configuration
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# with the fix in the message.
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find_package(PkgConfig QUIET)
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if(PkgConfig_FOUND)
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pkg_check_modules(GTK4_PC QUIET IMPORTED_TARGET gtk4)
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endif()
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if(NOT TARGET PkgConfig::GTK4_PC)
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message(FATAL_ERROR
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"plot: PLOT_BUILD_GTK4 is ON but GTK4 was not found (pkg-config gtk4). Install the "
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"GTK4 development package -- on Arch, gtk4 -- or configure with -DPLOT_BUILD_GTK4=OFF, "
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"or point PKG_CONFIG_PATH at the GTK4 .pc file.")
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endif()
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add_library(plot_gtk4 STATIC gtk_plot_area.cpp gtk_plot_area.hpp gtk_input.hpp)
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add_library(plot::gtk4 ALIAS plot_gtk4)
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# The public include root is `adapters/`, so the headers are reached as
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# <gtk4/gtk_plot_area.hpp> and <gtk4/gtk_input.hpp> -- the toolkit's name first,
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# like every other adapter's.
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target_include_directories(plot_gtk4 PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/..")
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# GTK is PUBLIC, unlike GLFW and ImGui: the adapter's factory hands out a
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# GtkWidget, so a consumer that embeds the area needs GTK's headers and libraries
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# to put it anywhere -- the widget *is* the toolkit's object -- and GTK's include
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# directory is not one the compiler searches by default.
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target_link_libraries(plot_gtk4 PUBLIC plot::core PkgConfig::GTK4_PC)
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plot_apply_warnings(plot_gtk4)
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