added file open/save dialog GUI logic

code/client/cl_imgui.cpp

@@ -1,6 +1,6 @@
 /*
 ===========================================================================
-Copyright (C) 2022-2023 Gian 'myT' Schellenbaum
+Copyright (C) 2022-2024 Gian 'myT' Schellenbaum
 
 This file is part of Challenge Quake 3 (CNQ3).
 
@@ -99,6 +99,161 @@ void ToggleBooleanWithShortcut(bool& value, ImGuiKey key)
 	}
 }
 
+struct FileDialog
+{
+	char folder[MAX_QPATH];
+	char fileName[MAX_QPATH];
+	char filePath[MAX_QPATH];
+	char extension[MAX_QPATH];
+	const char* dialogName;
+	char** filePaths;
+	int fileCount;
+	int selectedFileIndex;
+	bool saveMode;
+};
+
+static FileDialog saveFile;
+static FileDialog openFile;
+
+static bool PathHasExtension(const char* path, const char* extension)
+{
+	Q_assert(extension[0] == '.');
+
+	const int pathLength = strlen(path);
+	const int extLength = strlen(extension);
+	if(extLength >= pathLength)
+	{
+		return false;
+	}
+
+	return Q_stricmpn(path + pathLength - extLength, extension, extLength) == 0;
+}
+
+static void OpenFileDialog(FileDialog& dialog, const char* folder, const char* extension)
+{
+	if(ImGui::IsPopupOpen(dialog.dialogName))
+	{
+		return;
+	}
+
+	dialog.fileName[0] = '\0';
+	Q_strncpyz(dialog.folder, folder, sizeof(dialog.folder));
+	Q_strncpyz(dialog.extension, extension, sizeof(dialog.extension));
+	dialog.filePaths = FS_ListFiles(folder, extension, &dialog.fileCount);
+	dialog.selectedFileIndex = -1;
+	ImGui::OpenPopup(dialog.dialogName);
+}
+
+static bool DoFileDialog(FileDialog& dialog)
+{
+	bool success = false;
+	if(ImGui::BeginPopupModal(dialog.dialogName, NULL, ImGuiWindowFlags_AlwaysAutoResize))
+	{
+		if(BeginTable("Files", 1))
+		{
+			for(int i = 0; i < dialog.fileCount; i++)
+			{
+				ImGui::TableNextRow();
+				ImGui::TableSetColumnIndex(0);
+				if(ImGui::Selectable(dialog.filePaths[i], i == dialog.selectedFileIndex,
+					ImGuiSelectableFlags_DontClosePopups))
+				{
+					dialog.selectedFileIndex = i;
+					Q_strncpyz(dialog.fileName, dialog.filePaths[i], sizeof(dialog.fileName));
+				}
+			}
+			ImGui::EndTable();
+		}
+
+		if(dialog.saveMode)
+		{
+			if(ImGui::InputText("File path", dialog.fileName, sizeof(dialog.fileName)))
+			{
+				dialog.selectedFileIndex = -1;
+			}
+
+			if(ImGui::Button("Save") &&
+				dialog.fileName[0] != '\0' &&
+				dialog.fileName[0] != '.')
+			{
+				if(!PathHasExtension(dialog.fileName, dialog.extension))
+				{
+					const int lastCharIndex = strlen(dialog.fileName) - 1;
+					if(dialog.fileName[lastCharIndex] == '.')
+					{
+						dialog.fileName[lastCharIndex] = '\0';
+					}
+					Q_strcat(dialog.fileName, sizeof(dialog.fileName), dialog.extension);
+				}
+				Com_sprintf(dialog.filePath, sizeof(dialog.filePath),
+					"%s/%s", dialog.folder, dialog.fileName);
+				FS_FreeFileList(dialog.filePaths);
+				dialog.filePaths = NULL;
+				ImGui::CloseCurrentPopup();
+				success = true;
+			}
+		}
+		else
+		{
+			if(ImGui::Button("Open") &&
+				dialog.selectedFileIndex >= 0 &&
+				dialog.selectedFileIndex < dialog.fileCount)
+			{
+				Com_sprintf(dialog.filePath, sizeof(dialog.filePath),
+					"%s/%s", dialog.folder, dialog.filePaths[dialog.selectedFileIndex]);
+				FS_FreeFileList(dialog.filePaths);
+				dialog.filePaths = NULL;
+				ImGui::CloseCurrentPopup();
+				success = true;
+			}
+		}
+
+		ImGui::SameLine();
+		if(ImGui::Button("Cancel"))
+		{
+			FS_FreeFileList(dialog.filePaths);
+			dialog.filePaths = NULL;
+			ImGui::CloseCurrentPopup();
+		}
+
+		ImGui::EndPopup();
+	}
+
+	return success;
+}
+
+void OpenSaveFileDialog(const char* folder, const char* extension)
+{
+	Q_assert(extension[0] == '.');
+	OpenFileDialog(saveFile, folder, extension);
+}
+
+bool SaveFileDialog()
+{
+	return DoFileDialog(saveFile);
+}
+
+const char* GetSaveFileDialogPath()
+{
+	return saveFile.filePath;
+}
+
+void OpenOpenFileDialog(const char* folder, const char* extension)
+{
+	Q_assert(extension[0] == '.');
+	OpenFileDialog(openFile, folder, extension);
+}
+
+bool OpenFileDialog()
+{
+	return DoFileDialog(openFile);
+}
+
+const char* GetOpenFileDialogPath()
+{
+	return openFile.filePath;
+}
+
 struct MainMenuItem
 {
 	GUI_MainMenu::Id menu;
@@ -235,7 +390,7 @@ static void ImGUI_ApplyTheme()
 	colors[ImGuiCol_NavHighlight] = ImVec4(1.00f, 0.00f, 0.00f, 1.00f);
 	colors[ImGuiCol_NavWindowingHighlight] = ImVec4(1.00f, 0.00f, 0.00f, 0.70f);
 	colors[ImGuiCol_NavWindowingDimBg] = ImVec4(1.00f, 0.00f, 0.00f, 0.20f);
-	colors[ImGuiCol_ModalWindowDimBg] = ImVec4(1.00f, 0.00f, 0.00f, 0.35f);
+	colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.00f, 0.00f, 0.10f, 0.35f);
 
 	const ImVec4 hover(0.49f, 0.75f, 0.75f, 0.35f);
 	const ImVec4 active(0.49f, 1.00f, 1.00f, 0.55f);
@@ -454,6 +609,10 @@ void CL_IMGUI_Init()
 	{
 		keyMap[K_F1 + i] = ImGuiKey_F1 + i;
 	}
+
+	saveFile.saveMode = true;
+	saveFile.dialogName = "Save file";
+	openFile.dialogName = "Open file";
 }
 
 void CL_IMGUI_Frame()

code/client/cl_imgui.h

@@ -1,6 +1,6 @@
 /*
 ===========================================================================
-Copyright (C) 2022-2023 Gian 'myT' Schellenbaum
+Copyright (C) 2022-2024 Gian 'myT' Schellenbaum
 
 This file is part of Challenge Quake 3 (CNQ3).
 
@@ -36,6 +36,12 @@ void TableRow2(const char* item0, int item1);
 void TableRow2(const char* item0, float item1, const char* format = "%g");
 bool IsShortcutPressed(ImGuiKey key);
 void ToggleBooleanWithShortcut(bool& value, ImGuiKey key);
+void OpenSaveFileDialog(const char* folder, const char* extension);
+bool SaveFileDialog(); // true when the user clicked the save button
+const char* GetSaveFileDialogPath();
+void OpenOpenFileDialog(const char* folder, const char* extension);
+bool OpenFileDialog(); // true when the user clicked the open button
+const char* GetOpenFileDialogPath();
 
 #define MAIN_MENU_LIST(M) \
 	M(Tools, "Tools") \