Add CairoUI plugin example, WIP

Signed-off-by: falkTX <falktx@gmail.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/examples/CairoUI/DemoWidgetClickable.cc b/examples/CairoUI/DemoWidgetClickable.cc
new file mode 100644
index 00000000..7f2ecb75
--- /dev/null
+++ b/examples/CairoUI/DemoWidgetClickable.cc
@@ -0,0 +1,74 @@
+//          Copyright Jean Pierre Cimalando 2018.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#include "DemoWidgetClickable.h"
+
+#include "Cairo.hpp"
+#include "Window.hpp"
+
+DemoWidgetClickable::DemoWidgetClickable(Widget *group)
+    : Widget(group)
+{
+}
+
+void DemoWidgetClickable::onDisplay()
+{
+    cairo_t *cr = getParentWindow().getGraphicsContext().cairo;
+
+    Point<int> pt = getAbsolutePos();
+    Size<uint> sz = getSize();
+
+    int x = pt.getX();
+    int y = pt.getY();
+    int w = sz.getWidth();
+    int h = sz.getHeight();
+
+    switch (colorid_) {
+    case 0:
+        cairo_set_source_rgb(cr, 0.75, 0.0, 0.0);
+        break;
+    case 1:
+        cairo_set_source_rgb(cr, 0.0, 0.75, 0.0);
+        break;
+    case 2:
+        cairo_set_source_rgb(cr, 0.0, 0.0, 0.75);
+        break;
+    }
+    cairo_rectangle(cr, x, y, w, h);
+    cairo_fill(cr);
+
+    cairo_set_source_rgb(cr, 0.9, 0.9, 0.9);
+    cairo_new_path(cr);
+    cairo_move_to(cr, x + 0.25 * w, y + 0.25 * h);
+    cairo_line_to(cr, x + 0.75 * w, y + 0.75 * h);
+    cairo_stroke(cr);
+    cairo_new_path(cr);
+    cairo_move_to(cr, x + 0.75 * w, y + 0.25 * h);
+    cairo_line_to(cr, x + 0.25 * w, y + 0.75 * h);
+    cairo_stroke(cr);
+}
+
+bool DemoWidgetClickable::onMouse(const MouseEvent &event)
+{
+    if (event.press) {
+        Point<int> pos = getAbsolutePos();
+        Size<uint> size = getSize();
+
+        int mx = event.pos.getX();
+        int my = event.pos.getY();
+        int px = pos.getX();
+        int py = pos.getY();
+
+        bool inside = mx >= 0 && my >= 0 &&
+            mx < size.getWidth() && my < size.getHeight();
+
+        if (inside) {
+            colorid_ = (colorid_ + 1) % 3;
+            repaint();
+        }
+    }
+
+    return Widget::onMouse(event);
+}