Add file dialog

.gitmodules

@@ -18,3 +18,6 @@
 [submodule "deps/imgui/ImGuizmo"]
 	path = deps/imgui/ImGuizmo
 	url = https://github.com/nmwsharp/ImGuizmo.git
+[submodule "deps/imgui/ImGuiFileDialog"]
+	path = deps/imgui/ImGuiFileDialog
+	url = https://github.com/aiekick/ImGuiFileDialog.git

deps/CMakeLists.txt

@@ -22,6 +22,11 @@ if(NOT TARGET glm::glm)
   set_target_properties(glm PROPERTIES LINKER_LANGUAGE CXX)
 endif()
 
+## IconFontCppHeaders
+if(NOT TARGET IconFontCppHeaders)
+  add_subdirectory(IconFontCppHeaders)
+endif()
+
 ## Imgui
 if(NOT TARGET imgui)
   add_subdirectory(imgui)
@@ -41,8 +46,3 @@ endif()
 if(NOT TARGET stb)
   add_subdirectory(stb)
 endif()
-
-## IconFontCppHeaders
-if(NOT TARGET IconFontCppHeaders)
-  add_subdirectory(IconFontCppHeaders)
-endif()

deps/imgui/CMakeLists.txt

@@ -36,6 +36,11 @@ list(APPEND SRCS
         ImGuizmo/ImGuizmo.cpp
     )
 
+# ImGuiFileDialog sources
+list(APPEND SRCS
+        ImGuiFileDialog/ImGuiFileDialog.cpp
+    )
+
 
 # Add per-backend sources
 if("${POLYSCOPE_BACKEND_OPENGL3_GLFW}")
@@ -63,6 +68,10 @@ endif()
 add_library(imgui ${SRCS})
 target_compile_features(imgui PUBLIC cxx_std_11)
 set_target_properties(imgui PROPERTIES POSITION_INDEPENDENT_CODE TRUE)
+target_include_directories(imgui PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/config")
+target_include_directories(imgui PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/ImGuiFileDialog/")
+target_link_libraries(imgui PUBLIC IconFontCppHeaders)
+target_compile_definitions(imgui PUBLIC CUSTOM_IMGUIFILEDIALOG_CONFIG="polyscope_imgui_file_dialog_config.h")
 
 # Per-backend settings
 if("${POLYSCOPE_BACKEND_OPENGL3_GLFW}")

deps/imgui/config/polyscope_imgui_file_dialog_config.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "IconFontCppHeaders/IconsLucide.h"
+#include "ImGuiFileDialogConfig.h"
+
+#define USE_PLACES_FEATURE
+#define PLACES_PANE_DEFAULT_SHOWN false
+#define USE_PLACES_BOOKMARKS
+#define USE_PLACES_DEVICES
+
+#define dirEntryString ICON_LC_FOLDER " "
+#define linkEntryString ICON_LC_FILE_SYMLINK " "
+#define fileEntryString ICON_LC_FILE " "
+
+#define createDirButtonString ICON_LC_FOLDER_PLUS
+#define resetButtonString ICON_LC_REFRESH_CW
+#define editPathButtonString ICON_LC_PENCIL
+
+#define addPlaceButtonString ICON_LC_BOOKMARK_PLUS
+#define removePlaceButtonString ICON_LC_BOOKMARK_MINUS
+#define validatePlaceButtonString ICON_LC_CHECK
+#define editPlaceButtonString ICON_LC_PENCIL

examples/demo-app/demo_app.cpp

@@ -19,6 +19,10 @@
 #include "polyscope/volume_grid.h"
 #include "polyscope/volume_mesh.h"
 
+#include "IconFontCppHeaders/IconsLucide.h"
+#include "ImGuiFileDialog.h"
+
+#include <cstdio>
 #include <iostream>
 #include <set>
 #include <unordered_set>
@@ -868,6 +872,15 @@ void processFile(std::string filename) {
   }
 }
 
+enum class DemoFileDialogAction { None, OpenMesh, Save };
+
+DemoFileDialogAction demoFileDialogAction = DemoFileDialogAction::None;
+char demoSelectedFileDialogPath[4096] = "";
+
+void setDemoSelectedFileDialogPath(const std::string& path) {
+  std::snprintf(demoSelectedFileDialogPath, sizeof(demoSelectedFileDialogPath), "%s", path.c_str());
+}
+
 
 void callback() {
   static int numPoints = 2000;
@@ -880,6 +893,52 @@ void callback() {
   ImGui::InputInt("num points", &numPoints);
   ImGui::InputFloat("param value", &param);
 
+  ImGui::SetNextItemOpen(true, ImGuiCond_Once);
+  if (ImGui::TreeNode("File dialogs")) {
+    ImGui::SetNextItemWidth(-FLT_MIN);
+    ImGui::InputText("Selected path", demoSelectedFileDialogPath, sizeof(demoSelectedFileDialogPath),
+                     ImGuiInputTextFlags_ReadOnly);
+
+    if (ImGui::Button(ICON_LC_FOLDER_OPEN " Open mesh file")) {
+      IGFD::FileDialogConfig config;
+      config.flags = ImGuiFileDialogFlags_Modal;
+      ImGuiFileDialog::Instance()->OpenDialog("DemoFileDialog", ICON_LC_FOLDER_OPEN " Open a mesh",
+                                              "Mesh files{.obj,.ply,.mesh},All files{.*}", config);
+      demoFileDialogAction = DemoFileDialogAction::OpenMesh;
+    }
+
+    if (ImGui::Button(ICON_LC_SAVE " Save file")) {
+      IGFD::FileDialogConfig config;
+      config.fileName = "output.obj";
+      config.flags = ImGuiFileDialogFlags_Modal | ImGuiFileDialogFlags_ConfirmOverwrite;
+      ImGuiFileDialog::Instance()->OpenDialog("DemoFileDialog", ICON_LC_SAVE " Choose an output file", ".obj", config);
+      demoFileDialogAction = DemoFileDialogAction::Save;
+    }
+    ImGui::TreePop();
+  }
+
+  if (demoFileDialogAction != DemoFileDialogAction::None) {
+    const ImVec2 viewportSize = ImGui::GetMainViewport()->WorkSize;
+    const ImVec2 minDialogSize(viewportSize.x * 0.5f, viewportSize.y * 0.5f);
+    const ImVec2 maxDialogSize(viewportSize.x * 0.9f, viewportSize.y * 0.9f);
+    if (ImGuiFileDialog::Instance()->Display("DemoFileDialog", ImGuiWindowFlags_NoCollapse, minDialogSize,
+                                             maxDialogSize)) {
+      if (ImGuiFileDialog::Instance()->IsOk()) {
+        if (demoFileDialogAction == DemoFileDialogAction::OpenMesh) {
+          const std::string path = ImGuiFileDialog::Instance()->GetFilePathName();
+          setDemoSelectedFileDialogPath(path);
+          processFile(path);
+        } else {
+          const std::string path = ImGuiFileDialog::Instance()->GetFilePathName();
+          setDemoSelectedFileDialogPath(path);
+          std::cout << "Selected output file: " << path << std::endl;
+        }
+      }
+      ImGuiFileDialog::Instance()->Close();
+      demoFileDialogAction = DemoFileDialogAction::None;
+    }
+  }
+
   if (ImGui::Button("run subroutine")) {
     // mySubroutine();
   }