Add gtk98

Gtkmm3/gtk98_curves/meson.build

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+#A Simple Project Test
+project('gtk98', 'cpp',
+        default_options : ['c_std=c17', 'cpp_std=c++17'])
+
+#Initalize variants
+# gnome=import('gnome')
+
+#Compile Resource 
+# gresources = gnome.compile_resources(
+#     'resources', 'res/gtk91.resource.xml',
+#     source_dir: 'res',
+#     c_name: 'resources'
+# )
+
+#The Gtkmm Library as a dependency
+gtkdep = dependency('gtkmm-3.0')
+
+#Additional include dirs
+dir_include = include_directories('..')
+
+#Use Different Build Opinions in windows and Linux
+if host_machine.system() == 'windows'
+    win=import('windows')
+    icon_res=win.compile_resources('../icon.rc')
+    executable('gtk98', icon_res, 'src/main.cc', 'src/MyArea.cc', dependencies : gtkdep,
+				win_subsystem : 'windows', include_directories : dir_include)
+else
+    executable('gtk98', 'src/main.cc', 'src/MyArea.cc', dependencies : gtkdep,
+                include_directories : dir_include)
+endif

Gtkmm3/gtk98_curves/src/MyArea.cc

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+#include "MyArea.hh"
+
+bool MyArea::on_draw(const Cairo::RefPtr<Cairo::Context> &cr)
+{
+    Gtk::Allocation allocation = get_allocation();
+    const int width = allocation.get_width();
+    const int height = allocation.get_height();
+
+    double x0 = 0.1, y0 = 0.5, // start point
+        x1 = 0.4, y1 = 0.9,    // control point #1
+        x2 = 0.6, y2 = 0.1,    // control point #2
+        x3 = 0.9, y3 = 0.5;    // end point
+
+    // scale to unit square (0 to 1 width and height)
+    cr->scale(width, height);
+
+    cr->set_line_width(0.05);
+    // draw curve
+    cr->move_to(x0, y0);
+    cr->curve_to(x1, y1, x2, y2, x3, y3);
+    cr->stroke();
+    // show control points
+    cr->set_source_rgba(1, 0.2, 0.2, 0.6);
+    cr->move_to(x0, y0);
+    cr->line_to(x1, y1);
+    cr->move_to(x2, y2);
+    cr->line_to(x3, y3);
+    cr->stroke();
+
+    return true;
+}

Gtkmm3/gtk98_curves/src/MyArea.hh

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+#pragma once
+
+#include <gtkmm/drawingarea.h>
+
+class MyArea : public Gtk::DrawingArea{
+protected:
+    //Override default signal handler:
+    bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr) override;
+};

Gtkmm3/gtk98_curves/src/main.cc

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+#include <gtkmm/application.h>
+#include <gtkmm/window.h>
+#include "MyArea.hh"
+
+int main(int argc,char **argv){
+    auto app=Gtk::Application::create(argc,argv,"org.gtk.daleclack");
+    //Create a window
+    Gtk::Window window;
+    MyArea area1;
+    window.add(area1);
+    window.show_all();
+
+    return app->run(window);
+}