split icons to their own files

src/chat_gui/icons/direct.cpp

@@ -0,0 +1,49 @@
+#include "./direct.hpp"
+
+#include <array>
+
+static void drawIconDirectLines(
+	const ImVec2 p0,
+	const ImVec2 p1_o,
+	const ImU32 col,
+	const float thickness
+) {
+#define PLINE(x0, y0, x1, y1) \
+		ImGui::GetWindowDrawList()->AddLine( \
+			{p0.x + p1_o.x*(x0), p0.y + p1_o.y*(y0)}, \
+			{p0.x + p1_o.x*(x1), p0.y + p1_o.y*(y1)}, \
+			col, \
+			thickness \
+		);
+
+		// arrow 1
+		// (3,1) -> (9,7)
+		PLINE(0.3f, 0.1f, 0.9f, 0.7f)
+		// (9,7) -> (9,5)
+		PLINE(0.9f, 0.7f, 0.9f, 0.5f)
+		// (9,7) -> (7,7)
+		PLINE(0.9f, 0.7f, 0.7f, 0.7f)
+
+		// arrow 2
+		// (7,9) -> (1,3)
+		PLINE(0.7f, 0.9f, 0.1f, 0.3f)
+		// (1,3) -> (3,3)
+		PLINE(0.1f, 0.3f, 0.3f, 0.3f)
+		// (1,3) -> (1,5)
+		PLINE(0.1f, 0.3f, 0.1f, 0.5f)
+#undef PLINE
+}
+
+void drawIconDirect(
+	const ImVec2 p0,
+	const ImVec2 p1_o,
+	const ImU32 col_main,
+	const ImU32 col_back
+) {
+	// dark background
+	// the circle looks bad in light mode
+	//ImGui::GetWindowDrawList()->AddCircleFilled({p0.x + p1_o.x*0.5f, p0.y + p1_o.y*0.5f}, p1_o.x*0.5f, col_back);
+	drawIconDirectLines(p0, p1_o, col_back, 4.0f);
+	drawIconDirectLines(p0, p1_o, col_main, 1.5f);
+}
+