implement open file dialog for linux

linux/CMakeLists.txt

@@ -27,6 +27,7 @@ add_executable(panopainter
 	../libs/poly2tri/poly2tri/sweep/sweep_context.cc
 	../libs/poly2tri/poly2tri/sweep/sweep.cc
 	../libs/fmt/src/format.cc
+	../libs/tinyfiledialogs/tinyfiledialogs.c
 	../src/pch.cpp
 	../src/util.cpp
 	../src/rtt.cpp
@@ -115,6 +116,7 @@ target_include_directories(panopainter PRIVATE
 	../libs/hash-library
 	../libs/fmt/include
 	../libs/glad/include
+	../libs/tinyfiledialogs
 )
 
 target_link_libraries(panopainter glfw curl GL dl X11 pthread)

linux/src/main.cpp

@@ -70,13 +70,13 @@ int main(int argc, char** args)
         return 1;
     }
 
-    glfwSetCursorPosCallback(wnd, [](GLFWwindow* w, double x, double y){
+    glfwSetCursorPosCallback(wnd, [](GLFWwindow* wnd, double x, double y){
         g_cursor_pos = glm::vec2(x, y);
         app.ui_task_async([=]{
             app.mouse_move(x, y, 1.f, kEventSource::Mouse, false);
         });
     });
-    glfwSetMouseButtonCallback(wnd, [](GLFWwindow* w, int button, int action, int mods){
+    glfwSetMouseButtonCallback(wnd, [](GLFWwindow* wnd, int button, int action, int mods){
         app.ui_task_async([=]{
             if (action == GLFW_PRESS)
                 app.mouse_down(button, g_cursor_pos.x, g_cursor_pos.y, 1.f, kEventSource::Mouse, false);
@@ -95,6 +95,11 @@ int main(int argc, char** args)
                 glfwSetWindowShouldClose(app.glfw_window, GLFW_FALSE);
         });
     });
+    glfwSetWindowRefreshCallback(wnd, [](GLFWwindow* wnd){
+        app.ui_task_async([=]{
+            app.redraw = true;
+        }, true);
+    });
 
     glfwMakeContextCurrent(wnd);
     if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))

src/app_events.cpp

@@ -14,6 +14,9 @@ std::string win32_open_dir();
 void win32_show_cursor(bool visible);
 bool win32_clipboard_set_text(const std::string & s);
 std::string win32_clipboard_get_text();
+#elif __APPLE__
+#else
+#include <tinyfiledialogs.h>
 #endif
 
 
@@ -190,6 +193,9 @@ void App::pick_file(std::vector<std::string> types, std::function<void (std::str
     std::string path = win32_open_file(filter.c_str());
     if (!path.empty())
         callback(path);
+#else
+    if (auto p = tinyfd_openFileDialog("Open File", "", 0, nullptr, nullptr, false))
+        callback(p);
 #endif
 }