add file input for changing opened file view

src/app.zig

@@ -626,7 +626,8 @@ pub const Command = union(enum) {
     load_project,
     stop_output: Id, // Channel id
     start_output: Id, // Channel id
-    add_file_from_picker
+    add_file_from_picker,
+    reload_file: Id, // File id
 };
 
 pub const CollectionTask = struct {
@@ -742,7 +743,7 @@ fn deinitUI(self: *App) void {
 }
 
 fn loadProject(self: *App) !void {
-    if (self.isCollectionInProgress()) {
+    if (self.isNiDaqInUse()) {
         log.warn("Attempt to load while collection is still in progress. Loading canceled", .{});
         return;
     }
@@ -786,7 +787,7 @@ fn loadProject(self: *App) !void {
 }
 
 fn saveProject(self: *App) !void {
-    if (self.isCollectionInProgress()) {
+    if (self.isNiDaqInUse()) {
         log.warn("Attempt to save while collection is still in progress. Saving canceled", .{});
         return;
     }
@@ -933,6 +934,11 @@ pub fn tick(self: *App) !void {
             },
             .stop_output => |channel_id| {
                 self.stopOutput(channel_id);
+            },
+            .reload_file => |file_id| {
+                self.loadFile(file_id) catch |e| {
+                    log.err("Failed to load file: {}", .{ e });
+                };
             }
         }
     }
@@ -1105,6 +1111,20 @@ pub fn isCollectionInProgress(self: *App) bool {
     return self.collection_task != null;
 }
 
+pub fn isOutputingInProgress(self: *App) bool {
+    var channel_iter = self.project.channels.idIterator();
+    while (channel_iter.next()) |channel_id| {
+        if (self.isChannelOutputing(channel_id)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+fn isNiDaqInUse(self: *App) bool {
+    return self.isCollectionInProgress() or self.isOutputingInProgress();
+}
+
 pub fn collectionThreadCallback(self: *App) void {
     while (!self.should_close) {
 
@@ -1214,6 +1234,7 @@ pub fn loadFile(self: *App, id: Id) !void {
     file.clear(self.allocator);
 
     const cwd = std.fs.cwd();
+
     const samples_file = try cwd.openFile(file.path, .{ .mode = .read_only });
     defer samples_file.close();
 
@@ -1244,9 +1265,24 @@ pub fn addChannel(self: *App, channel_name: []const u8) !Id {
 
     const channel = self.project.channels.get(id).?;
     channel.* = Channel{
-        .name = try utils.initBoundedStringZ(Channel.Name, channel_name)
+        .name = try utils.initBoundedStringZ(Channel.Name, channel_name),
     };
 
+    if (self.project.save_location) |project_file_path| {
+        if (std.fs.path.dirname(project_file_path)) |project_dir| {
+            var clean_channel_name_buff = channel.name;
+            const clean_channel_name = utils.getBoundedStringZ(&clean_channel_name_buff);
+
+            // Sanitize the channel name, because it will be used as a filename
+            std.mem.replaceScalar(u8, clean_channel_name, '/', '_');
+
+            const filename = try std.mem.concat(self.allocator, u8, &.{ clean_channel_name, ".bin" });
+            defer self.allocator.free(filename);
+
+            channel.saved_collected_samples = try std.fs.path.join(self.allocator, &.{ project_dir, filename });
+        }
+    }
+
     self.loadChannel(id) catch |e| {
         log.err("Failed to load channel: {}", .{ e });
     };

src/main.zig

@@ -103,6 +103,15 @@ pub fn main() !void {
     defer app.deinit();
 
     if (builtin.mode == .Debug) {
+        var cwd_realpath_buff: [std.fs.MAX_PATH_BYTES]u8 = undefined;
+        const cwd_realpath = try std.fs.cwd().realpath(".", &cwd_realpath_buff);
+
+        const save_location = try std.fs.path.join(allocator, &.{ cwd_realpath, "project.proj" });
+        errdefer allocator.free(save_location);
+
+        app.project.save_location = save_location;
+        app.project.sample_rate = 5000;
+
         _ = try app.addView(.{
             .channel = try app.addChannel("Dev1/ai0")
         });
@@ -137,15 +146,6 @@ pub fn main() !void {
         //     .file = try app.addFile("samples/HeLa Cx37_ 40nM GFX + 35uM Propofol_18-Sep-2024_0003_I.bin")
         // });
 
-        var cwd_realpath_buff: [std.fs.MAX_PATH_BYTES]u8 = undefined;
-        const cwd_realpath = try std.fs.cwd().realpath(".", &cwd_realpath_buff);
-
-        const save_location = try std.fs.path.join(allocator, &.{ cwd_realpath, "project.proj" });
-        errdefer allocator.free(allocator);
-
-        app.project.save_location = save_location;
-        app.project.sample_rate = 5000;
-
         // try app.appendChannelFromDevice("Dev1/ai0");
         // try app.appendChannelFromDevice("Dev3/ao0");
         // try app.appendChannelFromFile("samples/HeLa Cx37_ 40nM GFX + 35uM Propofol_18-Sep-2024_0003_I.bin");

src/screens/main_screen.zig

@@ -37,6 +37,7 @@ parsed_sample_rate: ?f64 = null,
 
 // View settings
 channel_save_file_picker: ?Platform.FilePickerId = null,
+file_save_file_picker: ?Platform.FilePickerId = null,
 
 pub fn init(app: *App) !MainScreen {
     const allocator = app.allocator;
@@ -336,7 +337,8 @@ fn showViewSettings(self: *MainScreen, view_id: Id) !void {
                 .key = ui.keyFromString("Save location"),
                 .allocator = self.app.allocator,
                 .file_picker = &self.channel_save_file_picker,
-                .path = channel.saved_collected_samples
+                .path = channel.saved_collected_samples,
+                .open_dialog = false
             })) |path| {
                 if (channel.saved_collected_samples) |current_path| {
                     self.app.allocator.free(current_path);
@@ -353,6 +355,17 @@ fn showViewSettings(self: *MainScreen, view_id: Id) !void {
             if (file.samples) |samples| {
                 sample_count = samples.len;
             }
+
+            if (ui.fileInput(.{
+                .key = ui.keyFromString("Filename"),
+                .allocator = self.app.allocator,
+                .file_picker = &self.file_save_file_picker,
+                .path = file.path
+            })) |path| {
+                self.app.allocator.free(file.path);
+                file.path = path;
+                self.app.pushCommand(.{ .reload_file = file_id });
+            }
         }
 
     }

src/ui.zig

@@ -2277,6 +2277,7 @@ pub const FileInputOptions = struct {
     key: Key,
     allocator: std.mem.Allocator,
     file_picker: *?Platform.FilePickerId,
+    open_dialog: bool = true,
     path: ?[]const u8 = null
 };
 
@@ -2819,8 +2820,13 @@ pub fn fileInput(self: *UI, opts: FileInputOptions) ?[]u8 {
         const container_signal = self.signal(container);
         if (container_signal.clicked()) {
             var file_open_options: Platform.OpenFileOptions = .{};
-            file_open_options.style = .save;
+            if (opts.open_dialog) {
-            file_open_options.prompt_overwrite = true;
+                file_open_options.style = .open;
+                file_open_options.file_must_exist = true;
+            } else {
+                file_open_options.style = .save;
+                file_open_options.prompt_overwrite = true;
+            }
             file_open_options.appendFilter("All", "*") catch unreachable;
             file_open_options.appendFilter("Binary", "*.bin") catch unreachable;
 

src/utils.zig

@@ -74,7 +74,7 @@ pub fn initBoundedStringZ(comptime BoundedString: type, text: []const u8) !Bound
     return bounded_string;
 }
 
-pub fn getBoundedStringZ(bounded_array: anytype) [:0]const u8 {
+pub fn getBoundedStringZ(bounded_array: anytype) [:0]u8 {
     return bounded_array.buffer[0..(bounded_array.len-1) :0];
 }