Позиция мыши в координатах документа

src/ui/canvas_view.zig

@@ -22,6 +22,7 @@ pub fn canvasView(canvas: *Canvas, content_rect_scale: dvui.RectScale) void {
             {
                 drawCanvasContent(canvas, scroll);
                 handleCanvasZoom(canvas, scroll);
+                handleCanvasMouse(canvas, scroll);
             }
             scroll.deinit();
 
@@ -34,7 +35,7 @@ pub fn canvasView(canvas: *Canvas, content_rect_scale: dvui.RectScale) void {
 
 fn drawCanvasContent(canvas: *Canvas, scroll: anytype) void {
     const natural_scale = if (canvas.native_scaling) 1 else dvui.windowNaturalScale();
-    const img_size = canvas.getScaledImageSize();
+    const img_size = canvas.getZoomedImageSize();
     const viewport_rect = scroll.data().contentRect();
     const scroll_current = dvui.Point{ .x = canvas.scroll.viewport.x, .y = canvas.scroll.viewport.y };
 
@@ -118,3 +119,27 @@ fn handleCanvasZoom(canvas: *Canvas, scroll: anytype) void {
         }
     }
 }
+
+/// Обрабатывает события мыши: переводит позицию курсора в координаты документа и сохраняет в canvas.cursor_document_point.
+fn handleCanvasMouse(canvas: *Canvas, scroll: anytype) void {
+    const natural_scale = if (canvas.native_scaling) 1 else dvui.windowNaturalScale();
+
+    for (dvui.events()) |*e| {
+        switch (e.evt) {
+            .mouse => |*mouse| {
+                if (mouse.action != .press or mouse.button != .left) continue;
+                if (!dvui.eventMatchSimple(e, scroll.data())) continue;
+
+                const viewport_pt = scroll.data().contentRectScale().pointFromPhysical(mouse.p);
+                const content_pt = dvui.Point{
+                    .x = viewport_pt.x + canvas.scroll.viewport.x,
+                    .y = viewport_pt.y + canvas.scroll.viewport.y,
+                };
+                canvas.cursor_document_point = canvas.contentPointToDocument(content_pt, natural_scale);
+                if (canvas.cursor_document_point) |point|
+                    std.debug.print("cursor_document_point: {}\n", .{point});
+            },
+            else => {},
+        }
+    }
+}