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# ImGuiFileDialog

## Purpose

ImGuiFileDialog is a file selection dialog built for (and using only) [Dear ImGui](https://github.com/ocornut/imgui).

My primary goal was to have a custom pane with widgets according to file extension. This was not possible using other
solutions.

## Structure

* The library is in [Lib_Only branch](https://github.com/aiekick/ImGuiFileDialog/tree/Lib_Only)
* A demo app can be found the [master branch](https://github.com/aiekick/ImGuiFileDialog/tree/master)

This library is designed to be dropped into your source code rather than compiled separately.

From your project directory:

```
mkdir lib    <or 3rdparty, or externals, etc.>
cd lib
git clone https://github.com/aiekick/ImGuiFileDialog.git
git checkout Lib_Only
```

These commands create a `lib` directory where you can store any third-party dependencies used in your project, downloads
the ImGuiFileDialog git repository and checks out the Lib_Only branch where the actual library code is located.

Add `lib/ImGuiFileDialog/ImGuiFileDialog.cpp` to your build system and include
`lib/ImGuiFileDialog/ImGuiFileDialog.h` in your source code. ImGuiFileLib will compile with and be included directly in
your executable file.

If, for example, your project uses cmake, look for a line like `add_executable(my_project_name main.cpp)`
and change it to `add_executable(my_project_name lib/ImGuiFileDialog/ImGuiFileDialog.cpp main.cpp)`. This tells the
compiler where to find the source code declared in `ImGuiFileDialog.h` which you included in your own source code.

## Requirements:

You must also, of course, have added [Dear ImGui](https://github.com/ocornut/imgui) to your project for this to work at
all.

[dirent v1.23](https://github.com/tronkko/dirent/tree/v1.23) is required to use ImGuiFileDialog under Windows. It is
included in the Lib_Only branch for your convenience.

## Features

- Separate system for call and display
    - Can have many function calls with different parameters for one display function, for example
- Can create a custom pane with any widgets via function binding
    - This pane can block the validation of the dialog
    - Can also display different things according to current filter and UserDatas
- Advanced file style for file/dir/link coloring / icons / font
- Multi-selection (ctrl/shift + click) :
    - 0 => Infinite
    - 1 => One file (default)
    - n => n files
- Compatible with MacOs, Linux, Windows
    - Windows version can list drives
- Supports modal or standard dialog types
- Select files or directories
- Filter groups and custom filter names
- Keyboard navigation (arrows, backspace, enter)
- Exploring by entering characters (case insensitive)
- Directory bookmarks
- Directory manual entry (right click on any path element)
- Optional 'Confirm to Overwrite" dialog if file exists
- Thumbnails Display (agnostic way for compatibility with any backend, sucessfully tested with OpenGl and Vulkan)
- C Api (succesfully tested with CimGui)

## Singleton Pattern vs. Multiple Instances

### Single Dialog :

If you only need to display one file dialog at a time, use ImGuiFileDialog's singleton pattern to avoid explicitly
declaring an object:

```cpp
ImGuiFileDialog::Instance()->method_of_your_choice();
```

### Multiple Dialogs :

If you need to have multiple file dialogs open at once, declare each dialog explicity:

```cpp
ImGuiFileDialog instance_a;
instance_a.method_of_your_choice();
ImGuiFileDialog instance_b;
instance_b.method_of_your_choice();
```

## Simple Dialog :

```cpp
void drawGui()
{ 
  // open Dialog Simple
  if (ImGui::Button("Open File Dialog"))
    ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose File", ".cpp,.h,.hpp", ".");

  // display
  if (ImGuiFileDialog::Instance()->Display("ChooseFileDlgKey")) 
  {
    // action if OK
    if (ImGuiFileDialog::Instance()->IsOk())
    {
      std::string filePathName = ImGuiFileDialog::Instance()->GetFilePathName();
      std::string filePath = ImGuiFileDialog::Instance()->GetCurrentPath();
      // action
    }
    
    // close
    ImGuiFileDialog::Instance()->Close();
  }
}
```

![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/dlg_simple.gif)

## Directory Chooser :

To have a directory chooser, set the file extension filter to nullptr:

```cpp
ImGuiFileDialog::Instance()->OpenDialog("ChooseDirDlgKey", "Choose a Directory", nullptr, ".");
```

In this mode you can select any directory with one click and open a directory with a double-click.

![directoryChooser](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/directoryChooser.gif)

## Dialog with Custom Pane :

The signature of the custom pane callback is:

### for C++ :

```cpp
void(const char *vFilter, IGFDUserDatas vUserDatas, bool *vCantContinue)
```

### for C :

```c
void(const char *vFilter, void* vUserDatas, bool *vCantContinue)
```

### Example :

```cpp
static bool canValidateDialog = false;
inline void InfosPane(cosnt char *vFilter, IGFDUserDatas vUserDatas, bool *vCantContinue) // if vCantContinue is false, the user cant validate the dialog
{
    ImGui::TextColored(ImVec4(0, 1, 1, 1), "Infos Pane");
    ImGui::Text("Selected Filter : %s", vFilter.c_str());
    if (vUserDatas)
        ImGui::Text("UserDatas : %s", vUserDatas);
    ImGui::Checkbox("if not checked you cant validate the dialog", &canValidateDialog);
    if (vCantContinue)
        *vCantContinue = canValidateDialog;
}

void drawGui()
{
  // open Dialog with Pane
  if (ImGui::Button("Open File Dialog with a custom pane"))
    ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose File", ".cpp,.h,.hpp",
            ".", "", std::bind(&InfosPane, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3), 350, 1, UserDatas("InfosPane"));

  // display and action if ok
  if (ImGuiFileDialog::Instance()->Display("ChooseFileDlgKey")) 
  {
    if (ImGuiFileDialog::Instance()->IsOk())
    {
        std::string filePathName = ImGuiFileDialog::Instance()->GetFilePathName();
        std::string filePath = ImGuiFileDialog::Instance()->GetCurrentPath();
        std::string filter = ImGuiFileDialog::Instance()->GetCurrentFilter();
        // here convert from string because a string was passed as a userDatas, but it can be what you want
        std::string userDatas;
        if (ImGuiFileDialog::Instance()->GetUserDatas())
            userDatas = std::string((const char*)ImGuiFileDialog::Instance()->GetUserDatas()); 
        auto selection = ImGuiFileDialog::Instance()->GetSelection(); // multiselection

        // action
    }
    // close
    ImGuiFileDialog::Instance()->Close();
  }
}
```

![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/doc/dlg_with_pane.gif)

## File Style : Custom icons and colors by extension

You can define style for files/dirs/links in many ways :

the style can be colors, icons and fonts

the general form is :
```cpp
ImGuiFileDialog::Instance()->SetFileStyle(styleType, criteria, color, icon, font);

styleType can be thoses :

IGFD_FileStyleByTypeFile				// define style for all files
IGFD_FileStyleByTypeDir					// define style for all dir
IGFD_FileStyleByTypeLink				// define style for all link
IGFD_FileStyleByExtention				// define style by extention, for files or links
IGFD_FileStyleByFullName				// define style for particular file/dir/link full name (filename + extention)
IGFD_FileStyleByContainedInFullName		// define style for file/dir/link when criteria is contained in full name
```

ImGuiFileDialog accepts icon font macros as well as text tags for file types.

[ImGuIFontStudio](https://github.com/aiekick/ImGuiFontStudio) is useful here. I wrote it to make it easy to create 
custom icon sets for use with Dear ImGui.  

It is inspired by [IconFontCppHeaders](https://github.com/juliettef/IconFontCppHeaders), which can also be used with 
ImGuiFileDialog.

samples :

```cpp
// define style by file extention and Add an icon for .png files 
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".png", ImVec4(0.0f, 1.0f, 1.0f, 0.9f), ICON_IGFD_FILE_PIC, font1);
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".gif", ImVec4(0.0f, 1.0f, 0.5f, 0.9f), "[GIF]");

// define style for all directories
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeDir, "", ImVec4(0.5f, 1.0f, 0.9f, 0.9f), ICON_IGFD_FOLDER);
// can be for a specific directory
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeDir, ".git", ImVec4(0.5f, 1.0f, 0.9f, 0.9f), ICON_IGFD_FOLDER);

// define style for all files
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeFile, "", ImVec4(0.5f, 1.0f, 0.9f, 0.9f), ICON_IGFD_FILE);
// can be for a specific file
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeFile, ".git", ImVec4(0.5f, 1.0f, 0.9f, 0.9f), ICON_IGFD_FILE);

// define style for all links
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeLink, "", ImVec4(0.5f, 1.0f, 0.9f, 0.9f));
// can be for a specific link
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeLink, "Readme.md", ImVec4(0.5f, 1.0f, 0.9f, 0.9f));

// define style for any files/dirs/links by fullname
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByFullName, "doc", ImVec4(0.9f, 0.2f, 0.0f, 0.9f), ICON_IGFD_FILE_PIC);

// define style by file who are containing this string
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByContainedInFullName, ".git", ImVec4(0.9f, 0.2f, 0.0f, 0.9f), ICON_IGFD_BOOKMARK);

all of theses can be miwed with IGFD_FileStyleByTypeDir / IGFD_FileStyleByTypeFile / IGFD_FileStyleByTypeLink
like theses by ex :
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeDir | IGFD_FileStyleByContainedInFullName, ".git", ImVec4(0.9f, 0.2f, 0.0f, 0.9f), ICON_IGFD_BOOKMARK);
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeFile | IGFD_FileStyleByFullName, "cmake", ImVec4(0.5f, 0.8f, 0.5f, 0.9f), ICON_IGFD_SAVE);
```

this sample code of [master/main.cpp](https://github.com/aiekick/ImGuiFileDialog/blob/master/main.cpp) produce the picture above :

```cpp
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".cpp", ImVec4(1.0f, 1.0f, 0.0f, 0.9f));
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".h", ImVec4(0.0f, 1.0f, 0.0f, 0.9f));
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".hpp", ImVec4(0.0f, 0.0f, 1.0f, 0.9f));
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".md", ImVec4(1.0f, 0.0f, 1.0f, 0.9f));
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".png", ImVec4(0.0f, 1.0f, 1.0f, 0.9f), ICON_IGFD_FILE_PIC); // add an icon for the filter type
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".gif", ImVec4(0.0f, 1.0f, 0.5f, 0.9f), "[GIF]"); // add an text for a filter type
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeDir, nullptr, ImVec4(0.5f, 1.0f, 0.9f, 0.9f), ICON_IGFD_FOLDER); // for all dirs
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeFile, "CMakeLists.txt", ImVec4(0.1f, 0.5f, 0.5f, 0.9f), ICON_IGFD_ADD);
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByFullName, "doc", ImVec4(0.9f, 0.2f, 0.0f, 0.9f), ICON_IGFD_FILE_PIC);
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeDir | IGFD_FileStyleByContainedInFullName, ".git", ImVec4(0.9f, 0.2f, 0.0f, 0.9f), ICON_IGFD_BOOKMARK);
ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByTypeFile | IGFD_FileStyleByContainedInFullName, ".git", ImVec4(0.5f, 0.8f, 0.5f, 0.9f), ICON_IGFD_SAVE);
```

![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/color_filter.png)

## Filter Collections

You can define a custom filter name that corresponds to a group of filters using this syntax:

```custom_name1{filter1,filter2,filter3},custom_name2{filter1,filter2},filter1```

When you select custom_name1, filters 1 to 3 will be applied. The characters `{` and `}` are reserved. Don't use them
for filter names.

this code :

```cpp
const char *filters = "Source files (*.cpp *.h *.hpp){.cpp,.h,.hpp},Image files (*.png *.gif *.jpg *.jpeg){.png,.gif,.jpg,.jpeg},.md";
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", ICON_IMFDLG_FOLDER_OPEN " Choose a File", filters, ".");
```

will produce :
![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/collectionFilters.gif)

## Multi Selection

You can define in OpenDialog/OpenModal call the count file you want to select :

- 0 => infinite
- 1 => one file only (default)
- n => n files only

See the define at the end of these funcs after path.

```cpp
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose File", ".*,.cpp,.h,.hpp", ".");
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose 1 File", ".*,.cpp,.h,.hpp", ".", 1);
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose 5 File", ".*,.cpp,.h,.hpp", ".", 5);
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose many File", ".*,.cpp,.h,.hpp", ".", 0);
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey", "Choose File", ".png,.jpg",
   ".", "", std::bind(&InfosPane, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3), 350, 1, "SaveFile"); // 1 file
```

![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/multiSelection.gif)

## File Dialog Constraints

You can set the minimum and/or maximum size of the dialog:

```cpp
ImVec2 maxSize = ImVec2((float)display_w, (float)display_h);  // The full display area
ImVec2 minSize = maxSize * 0.5f;  // Half the display area
ImGuiFileDialog::Instance()->Display("ChooseFileDlgKey", ImGuiWindowFlags_NoCollapse, minSize, maxSize);
```

![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/dialog_constraints.gif)

## Detail View Mode

Dear ImGui just released an improved table API. If your downloaded version of Dear ImGui includes the beta version of
table support (included for some time now) you can enable table support by uncommenting `#define USE_IMGUI_TABLES` in
you custom config file (CustomImGuiFileDialogConfig.h)

If your version of Dear ImGui has finalized tables support, it will be enabled by default.
![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/imgui_tables_branch.gif)

## Exploring by keys

You can activate this feature by uncommenting `#define USE_EXPLORATION_BY_KEYS`
in your custom config file (CustomImGuiFileDialogConfig.h)

You can also uncomment the next lines to define navigation keys:

* IGFD_KEY_UP => Up key for explore to the top
* IGFD_KEY_DOWN => Down key for explore to the bottom
* IGFD_KEY_ENTER => Enter key for open directory
* IGFD_KEY_BACKSPACE => BackSpace for comming back to the last directory

You can also jump to a point in the file list by pressing the corresponding key of the first filename character.

![alt text](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/explore_ny_keys.gif)

As you see the current item is flashed by default for 1 second. You can define the flashing lifetime with the function

```cpp
ImGuiFileDialog::Instance()->SetFlashingAttenuationInSeconds(1.0f);
```

## Bookmarks

You can create/edit/call path bookmarks and load/save them.

Activate this feature by uncommenting: `#define USE_BOOKMARK` in your custom config file (CustomImGuiFileDialogConfig.h)

More customization options:

```cpp
#define bookmarkPaneWith 150.0f => width of the bookmark pane
#define IMGUI_TOGGLE_BUTTON ToggleButton => customize the Toggled button (button stamp must be : (const char* label, bool *toggle)
#define bookmarksButtonString "Bookmark" => the text in the toggle button
#define bookmarksButtonHelpString "Bookmark" => the helper text when mouse over the button
#define addBookmarkButtonString "+" => the button for add a bookmark
#define removeBookmarkButtonString "-" => the button for remove the selected bookmark
```

* You can select each bookmark to edit the displayed name corresponding to a path
* Double-click on the label to apply the bookmark

![bookmarks.gif](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/bookmarks.gif)

You can also serialize/deserialize bookmarks (for example to load/save from/to a file):
```cpp
Load => ImGuiFileDialog::Instance()->DeserializeBookmarks(bookmarString);
Save => std::string bookmarkString = ImGuiFileDialog::Instance()->SerializeBookmarks();
```
(please see example code for details)

## Path Edition :

Right clicking on any path element button allows the user to manually edit the path from that portion of the tree.
Pressing the completion key (GLFW uses `enter` by default) validates the new path. Pressing the cancel key (GLFW
uses`escape` by default) cancels the manual entry and restores the original path.

Here's the manual entry operation in action:
![inputPathEdition.gif](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/inputPathEdition.gif)

## Confirm Overwrite Dialog :

If you want avoid overwriting files after selection, ImGuiFileDialog can show a dialog to confirm or cancel the
operation.

To do so, define the flag ImGuiFileDialogFlags_ConfirmOverwrite in your call to OpenDialog/OpenModal.

By default this flag is not set since there is no pre-defined way to define if a dialog will be for Open or Save
behavior. (by design! :) )

Example code For Standard Dialog :

```cpp
ImGuiFileDialog::Instance()->OpenDialog("ChooseFileDlgKey",
    ICON_IGFD_SAVE " Choose a File", filters,
    ".", "", 1, nullptr, ImGuiFileDialogFlags_ConfirmOverwrite);
```

Example code For Modal Dialog :

```cpp
ImGuiFileDialog::Instance()->OpenModal("ChooseFileDlgKey",
    ICON_IGFD_SAVE " Choose a File", filters,
    ".", "", 1, nullptr, ImGuiFileDialogFlags_ConfirmOverwrite);
```

This dialog will only verify the file in the file field, not with `GetSelection()`.

The confirmation dialog will be a non-movable modal (input blocking) dialog displayed in the middle of the current
ImGuiFileDialog window.

As usual, you can customize the dialog in your custom config file (CustomImGuiFileDialogConfig.h in this example)

Uncomment these line for customization options:

```cpp
//#define OverWriteDialogTitleString "The file Already Exist !"
//#define OverWriteDialogMessageString "Would you like to OverWrite it ?"
//#define OverWriteDialogConfirmButtonString "Confirm"
//#define OverWriteDialogCancelButtonString "Cancel"
```

See the result :

![ConfirmToOverWrite.gif](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/ConfirmToOverWrite.gif)

## Open / Save dialog Behavior :

ImGuiFileDialog uses the same code internally for Open and Save dialogs. To distinguish between them access the various
data return functions depending on what the dialog is doing.

When selecting an existing file (for example, a Load or Open dialog), use

```cpp
std::map<std::string, std::string> GetSelection(); // Returns selection via a map<FileName, FilePathName>
UserDatas GetUserDatas();                          // Get user data provided by the Open dialog
```

To selecting a new file (for example, a Save As... dialog), use:

```cpp
std::string GetFilePathName();                     // Returns the content of the selection field with current file extension and current path
std::string GetCurrentFileName();                  // Returns the content of the selection field with current file extension but no path
std::string GetCurrentPath();                      // Returns current path only
std::string GetCurrentFilter();                    // The file extension
```

## Thumbnails Display

You can now, display thumbnails of pictures.

![thumbnails.gif](https://github.com/aiekick/ImGuiFileDialog/blob/master/doc/thumbnails.gif)

The file resize use stb/image so the following files extentions are supported :
 * .png (tested sucessfully)
 * .bmp (tested sucessfully)
 * .tga (tested sucessfully)
 * .jpg (tested sucessfully)
 * .jpeg (tested sucessfully)
 * .gif (tested sucessfully_ but not animation just first frame)
 * .psd (not tested)
 * .pic (not tested)
 * .ppm (not tested)
 * .pgm (not tested)

Corresponding to your backend (ex : OpenGl) you need to define two callbacks :
* the first is a callback who will be called by ImGuiFileDialog for create the backend texture
* the second is a callback who will be called by ImGuiFileDialog for destroy the backend texture

After that you need to call the function who is responsible to create / destroy the textures.
this function must be called in your GPU Rendering zone for avoid destroying of used texture.
if you do that at the same place of your imgui code, some backend can crash your app, by ex with vulkan.

ex, for opengl :

```cpp
// Create thumbnails texture
ImGuiFileDialog::Instance()->SetCreateThumbnailCallback([](IGFD_Thumbnail_Info *vThumbnail_Info) -> void
{
	if (vThumbnail_Info && 
		vThumbnail_Info->isReadyToUpload && 
		vThumbnail_Info->textureFileDatas)
	{
		GLuint textureId = 0;
		glGenTextures(1, &textureId);
		vThumbnail_Info->textureID = (void*)textureId;

		glBindTexture(GL_TEXTURE_2D, textureId);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
			(GLsizei)vThumbnail_Info->textureWidth, (GLsizei)vThumbnail_Info->textureHeight, 
			0, GL_RGBA, GL_UNSIGNED_BYTE, vThumbnail_Info->textureFileDatas);
		glFinish();
		glBindTexture(GL_TEXTURE_2D, 0);

		delete[] vThumbnail_Info->textureFileDatas;
		vThumbnail_Info->textureFileDatas = nullptr;

		vThumbnail_Info->isReadyToUpload = false;
		vThumbnail_Info->isReadyToDisplay = true;
	}
});
```

```cpp
// Destroy thumbnails texture
ImGuiFileDialog::Instance()->SetDestroyThumbnailCallback([](IGFD_Thumbnail_Info* vThumbnail_Info)
{
	if (vThumbnail_Info)
	{
		GLuint texID = (GLuint)vThumbnail_Info->textureID;
		glDeleteTextures(1, &texID);
		glFinish();
	}
});
```

```cpp
// GPU Rendering Zone // To call for Create/ Destroy Textures
ImGuiFileDialog::Instance()->ManageGPUThumbnails();
```

## How to Integrate ImGuiFileDialog in your project

### Customize ImGuiFileDialog :

You can customize many aspects of ImGuiFileDialog by overriding `ImGuiFileDialogConfig.h`.

To enable your customizations, define the preprocessor directive CUSTOM_IMGUIFILEDIALOG_CONFIG with the path of your
custom config file. This path must be relative to the directory where you put the ImGuiFileDialog module.

This operation is demonstrated in `CustomImGuiFileDialog.h` in the example project to:

* Have a custom icon font instead of labels for buttons or message titles
* Customize the button text (the button call signature must be the same, by the way! :)

The custom icon font used in the example code ([CustomFont.cpp](CustomFont.cpp) and [CustomFont.h](CustomFont.h)) was made
with [ImGuiFontStudio](https://github.com/aiekick/ImGuiFontStudio), which I wrote. :)

ImGuiFontStudio uses ImGuiFileDialog! Check it out.

## Api's C/C++ :

### C++.

this is the base API :

```cpp
static FileDialog* Instance()                      // Singleton for easier accces form anywhere but only one dialog at a time

FileDialog();                                      // ImGuiFileDialog Constructor. can be used for have many dialog at same tiem (not possible with singleton)

// standard dialog
void OpenDialog(                                   // open simple dialog (path and fileName can be specified)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vPath,                      // path
    const std::string& vFileName,                  // defaut file name
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

void OpenDialog(                                   // open simple dialog (path and filename are obtained from filePathName)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vFilePathName,              // file path name (will be decompsoed in path and fileName)
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

// with pane
void OpenDialog(                                   // open dialog with custom right pane (path and fileName can be specified)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vPath,                      // path
    const std::string& vFileName,                  // defaut file name
    const PaneFun& vSidePane,                      // side pane
    const float& vSidePaneWidth = 250.0f,          // side pane width
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

void OpenDialog(                                   // open dialog with custom right pane (path and filename are obtained from filePathName)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vFilePathName,              // file path name (will be decompsoed in path and fileName)
    const PaneFun& vSidePane,                      // side pane
    const float& vSidePaneWidth = 250.0f,          // side pane width
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

// modal dialog
void OpenModal(                                    // open simple modal (path and fileName can be specified)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vPath,                      // path
    const std::string& vFileName,                  // defaut file name
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

void OpenModal(                                    // open simple modal (path and fielname are obtained from filePathName)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vFilePathName,              // file path name (will be decompsoed in path and fileName)
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

// with pane
void OpenModal(                                    // open modal with custom right pane (path and filename are obtained from filePathName)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vPath,                      // path
    const std::string& vFileName,                  // defaut file name
    const PaneFun& vSidePane,                      // side pane
    const float& vSidePaneWidth = 250.0f,                               // side pane width
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

void OpenModal(                                    // open modal with custom right pane (path and fielname are obtained from filePathName)
    const std::string& vKey,                       // key dialog
    const std::string& vTitle,                     // title
    const char* vFilters,                          // filters
    const std::string& vFilePathName,              // file path name (will be decompsoed in path and fileName)
    const PaneFun& vSidePane,                      // side pane
    const float& vSidePaneWidth = 250.0f,                               // side pane width
    const int& vCountSelectionMax = 1,             // count selection max
    UserDatas vUserDatas = nullptr,                // user datas (can be retrieved in pane)
    ImGuiFileDialogFlags vFlags = 0);              // ImGuiFileDialogFlags 

// Display / Close dialog form
bool Display(                                      // Display the dialog. return true if a result was obtained (Ok or not)
    const std::string& vKey,                       // key dialog to display (if not the same key as defined by OpenDialog/Modal => no opening)
    ImGuiWindowFlags vFlags = ImGuiWindowFlags_NoCollapse, // ImGuiWindowFlags
    ImVec2 vMinSize = ImVec2(0, 0),                // mininmal size contraint for the ImGuiWindow
    ImVec2 vMaxSize = ImVec2(FLT_MAX, FLT_MAX));   // maximal size contraint for the ImGuiWindow
void Close();                                      // close dialog

// queries
bool WasOpenedThisFrame(const std::string& vKey);  // say if the dialog key was already opened this frame
bool WasOpenedThisFrame();                         // say if the dialog was already opened this frame
bool IsOpened(const std::string& vKey);            // say if the key is opened
bool IsOpened();                                   // say if the dialog is opened somewhere    
std::string GetOpenedKey();                        // return the dialog key who is opened, return nothing if not opened

// get result
bool IsOk();                                       // true => Dialog Closed with Ok result / false : Dialog closed with cancel result
std::map<std::string, std::string> GetSelection(); // Open File behavior : will return selection via a map<FileName, FilePathName>
std::string GetFilePathName();                     // Save File behavior : will always return the content of the field with current filter extention and current path
std::string GetCurrentFileName();                  // Save File behavior : will always return the content of the field with current filter extention
std::string GetCurrentPath();                      // will return current path
std::string GetCurrentFilter();                    // will return selected filter
UserDatas GetUserDatas();                          // will return user datas send with Open Dialog/Modal
        
// extentions displaying
void SetExtentionInfos(                            // SetExtention datas for have custom display of particular file type
    const std::string& vFilter,                    // extention filter to tune
    const FileExtentionInfosStruct& vInfos);       // Filter Extention Struct who contain Color and Icon/Text for the display of the file with extention filter
void SetExtentionInfos(                            // SetExtention datas for have custom display of particular file type
    const std::string& vFilter,                    // extention filter to tune
    const ImVec4& vColor,                          // wanted color for the display of the file with extention filter
    const std::string& vIcon = "");                // wanted text or icon of the file with extention filter
bool GetExtentionInfos(                            // GetExtention datas. return true is extention exist
    const std::string& vFilter,                    // extention filter (same as used in SetExtentionInfos)
    ImVec4 *vOutColor,                             // color to retrieve
    std::string* vOutIcon = 0);                    // icon or text to retrieve
void ClearExtentionInfos();                        // clear extentions setttings

feature : USE_EXPLORATION_BY_KEYS
void SetFlashingAttenuationInSeconds(              // set the flashing time of the line in file list when use exploration keys
    float vAttenValue);                            // set the attenuation (from flashed to not flashed) in seconds

feature : USE_BOOKMARK
std::string SerializeBookmarks();                  // serialize bookmarks : return bookmark buffer to save in a file
void DeserializeBookmarks(                         // deserialize bookmarks : load bookmar buffer to load in the dialog (saved from previous use with SerializeBookmarks())
    const std::string& vBookmarks);                // bookmark buffer to load

feature : USE_THUMBNAILS
void SetCreateThumbnailCallback(const CreateThumbnailFun vCreateThumbnailFun);		// define the texture creation callback
void SetDestroyThumbnailCallback(const DestroyThumbnailFun vCreateThumbnailFun);	// define the texture destroy callback
void ManageGPUThumbnails();															// in gpu rendering zone, whill create or destroy textures
```

### C Api

this api was sucessfully tested with CImGui

```cpp
    struct IGFD_Selection_Pair
    {
        char* fileName;
        char* filePathName;
    };

    IMGUIFILEDIALOG_API IGFD_Selection_Pair IGFD_Selection_Pair_Get();  // return an initialized IGFD_Selection_Pair            
    IMGUIFILEDIALOG_API void IGFD_Selection_Pair_DestroyContent(
	    IGFD_Selection_Pair *vSelection_Pair);                          // destroy the content of a IGFD_Selection_Pair
    
    struct IGFD_Selection
    {
        IGFD_Selection_Pair* table;
        size_t count;
    };

    IMGUIFILEDIALOG_API IGFD_Selection IGFD_Selection_Get();            // return an initialized IGFD_Selection
    IMGUIFILEDIALOG_API void IGFD_Selection_DestroyContent(
	    IGFD_Selection* vSelection);                                    // destroy the content of a IGFD_Selection

    // constructor / destructor
    IMGUIFILEDIALOG_API ImGuiFileDialog* IGFD_Create(void);             // create the filedialog context
    IMGUIFILEDIALOG_API void IGFD_Destroy(ImGuiFileDialog *vContext);   // destroy the filedialog context

    typedef void (*IGFD_PaneFun)(const char*, void*, bool*);            // callback fucntion for display the pane
    
    IMGUIFILEDIALOG_API void IGFD_OpenDialog(                           // open a standard dialog
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vPath,                                              // path
        const char* vFileName,                                          // defaut file name
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 
    
    IMGUIFILEDIALOG_API void IGFD_OpenDialog2(                          // open a standard dialog
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vFilePathName,                                      // defaut file path name (path and filename witl be extracted from it)
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API void IGFD_OpenPaneDialog(                       // open a standard dialog with pane
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vPath,                                              // path
        const char* vFileName,                                          // defaut file name
        const IGFD_PaneFun vSidePane,                                   // side pane
        const float vSidePaneWidth,                                     // side pane base width
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API void IGFD_OpenPaneDialog2(                      // open a standard dialog with pane
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vFilePathName,                                      // defaut file name (path and filename witl be extracted from it)
        const IGFD_PaneFun vSidePane,                                   // side pane
        const float vSidePaneWidth,                                     // side pane base width
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API void IGFD_OpenModal(                            // open a modal dialog
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vPath,                                              // path
        const char* vFileName,                                          // defaut file name
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API void IGFD_OpenModal2(                           // open a modal dialog
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vFilePathName,                                      // defaut file name (path and filename witl be extracted from it)
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API void IGFD_OpenPaneModal(                        // open a modal dialog with pane
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vPath,                                              // path
        const char* vFileName,                                          // defaut file name
        const IGFD_PaneFun vSidePane,                                   // side pane
        const float vSidePaneWidth,                                     // side pane base width
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API void IGFD_OpenPaneModal2(                       // open a modal dialog with pane
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog
        const char* vTitle,                                             // title
        const char* vFilters,                                           // filters/filter collections. set it to null for directory mode 
        const char* vFilePathName,                                      // defaut file name (path and filename witl be extracted from it)
        const IGFD_PaneFun vSidePane,                                   // side pane
        const float vSidePaneWidth,                                     // side pane base width
        const int vCountSelectionMax,                                   // count selection max
        void* vUserDatas,                                               // user datas (can be retrieved in pane)
        ImGuiFileDialogFlags vFlags);                                   // ImGuiFileDialogFlags 

    IMGUIFILEDIALOG_API bool IGFD_DisplayDialog(                        // Display the dialog
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context
        const char* vKey,                                               // key dialog to display (if not the same key as defined by OpenDialog/Modal => no opening)
        ImGuiWindowFlags vFlags,                                        // ImGuiWindowFlags
        ImVec2 vMinSize,                                                // mininmal size contraint for the ImGuiWindow
        ImVec2 vMaxSize);                                               // maximal size contraint for the ImGuiWindow

    IMGUIFILEDIALOG_API void IGFD_CloseDialog(                          // Close the dialog
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context            

    IMGUIFILEDIALOG_API bool IGFD_IsOk(                                 // true => Dialog Closed with Ok result / false : Dialog closed with cancel result
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context        

    IMGUIFILEDIALOG_API bool IGFD_WasKeyOpenedThisFrame(                // say if the dialog key was already opened this frame
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context        
        const char* vKey);

    IMGUIFILEDIALOG_API bool IGFD_WasOpenedThisFrame(                   // say if the dialog was already opened this frame
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context    

    IMGUIFILEDIALOG_API bool IGFD_IsKeyOpened(                          // say if the dialog key is opened
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context        
        const char* vCurrentOpenedKey);                                 // the dialog key

    IMGUIFILEDIALOG_API bool IGFD_IsOpened(                             // say if the dialog is opened somewhere    
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context        
    
    IMGUIFILEDIALOG_API IGFD_Selection IGFD_GetSelection(               // Open File behavior : will return selection via a map<FileName, FilePathName>
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context        

    IMGUIFILEDIALOG_API char* IGFD_GetFilePathName(                     // Save File behavior : will always return the content of the field with current filter extention and current path
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context                

    IMGUIFILEDIALOG_API char* IGFD_GetCurrentFileName(                  // Save File behavior : will always return the content of the field with current filter extention
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context                

    IMGUIFILEDIALOG_API char* IGFD_GetCurrentPath(                      // will return current path
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context                    

    IMGUIFILEDIALOG_API char* IGFD_GetCurrentFilter(                    // will return selected filter
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context                        

    IMGUIFILEDIALOG_API void* IGFD_GetUserDatas(                        // will return user datas send with Open Dialog/Modal
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context                                            

    IMGUIFILEDIALOG_API void IGFD_SetExtentionInfos(                    // SetExtention datas for have custom display of particular file type
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context 
        const char* vFilter,                                            // extention filter to tune
        ImVec4 vColor,                                                  // wanted color for the display of the file with extention filter
        const char* vIconText);                                         // wanted text or icon of the file with extention filter (can be sued with font icon)

    IMGUIFILEDIALOG_API void IGFD_SetExtentionInfos2(                   // SetExtention datas for have custom display of particular file type
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context 
        const char* vFilter,                                            // extention filter to tune
        float vR, float vG, float vB, float vA,                         // wanted color channels RGBA for the display of the file with extention filter
        const char* vIconText);                                         // wanted text or icon of the file with extention filter (can be sued with font icon)

    IMGUIFILEDIALOG_API bool IGFD_GetExtentionInfos(
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context 
        const char* vFilter,                                            // extention filter (same as used in SetExtentionInfos)
        ImVec4* vOutColor,                                              // color to retrieve
        char** vOutIconText);                                           // icon or text to retrieve

    IMGUIFILEDIALOG_API void IGFD_ClearExtentionInfos(                  // clear extentions setttings
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context

feature : USE_EXPLORATION_BY_KEYS
    IMGUIFILEDIALOG_API void IGFD_SetFlashingAttenuationInSeconds(      // set the flashing time of the line in file list when use exploration keys
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context 
        float vAttenValue);                                             // set the attenuation (from flashed to not flashed) in seconds

feature : USE_BOOKMARK
    IMGUIFILEDIALOG_API char* IGFD_SerializeBookmarks(                  // serialize bookmarks : return bookmark buffer to save in a file
        ImGuiFileDialog* vContext);                                     // ImGuiFileDialog context

    IMGUIFILEDIALOG_API void IGFD_DeserializeBookmarks(                 // deserialize bookmarks : load bookmar buffer to load in the dialog (saved from previous use with SerializeBookmarks())
        ImGuiFileDialog* vContext,                                      // ImGuiFileDialog context 
        const char* vBookmarks);                                        // bookmark buffer to load 

feature : USE_THUMBNAILS
	IMGUIFILEDIALOG_API void SetCreateThumbnailCallback(				// define the callback for create the thumbnails texture
		ImGuiFileDialog* vContext,										// ImGuiFileDialog context 
		const IGFD_CreateThumbnailFun vCreateThumbnailFun);				// the callback for create the thumbnails texture

	IMGUIFILEDIALOG_API void SetDestroyThumbnailCallback(				// define the callback for destroy the thumbnails texture
		ImGuiFileDialog* vContext,										// ImGuiFileDialog context 
		const IGFD_DestroyThumbnailFun vDestroyThumbnailFun);			// the callback for destroy the thumbnails texture

	IMGUIFILEDIALOG_API void ManageGPUThumbnails(						// must be call in gpu zone, possibly a thread, will call the callback for create / destroy the textures
		ImGuiFileDialog* vContext);										// ImGuiFileDialog context 
```