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* Bug fix: grid doesn't update correctly if all books are removed

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* Beginning (incomplete) new menu for batch actions on visible books
This commit is contained in:
Robert McRackan 2022-05-11 10:13:07 -04:00
parent e368e4669b
commit c3871d3bca
4 changed files with 177 additions and 115 deletions
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32
Source/LibationWinForms/grid/ProductsGrid.cs
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@ -14,6 +14,7 @@ using LibationWinForms.Dialogs;
namespace LibationWinForms
{
#region // legacy instructions to update data_grid_view
// INSTRUCTIONS TO UPDATE DATA_GRID_VIEW
// - delete current DataGridView
// - view > other windows > data sources
@ -27,7 +28,10 @@ namespace LibationWinForms
// - go to Design view
// - click on Data Sources > ProductItem. dropdown: DataGridView
// - drag/drop ProductItem on design surface
// AS OF AUGUST 2021 THIS DOES NOT WORK IN VS2019 WITH .NET-5 PROJECTS
//
// as of august 2021 this does not work in vs2019 with .net5 projects
// VS has improved since then with .net6+ but I haven't checked again
#endregion
public partial class ProductsGrid : UserControl
{
@ -44,10 +48,12 @@ namespace LibationWinForms
_dataGridView.Sorted += Filter;
_dataGridView.CellContentClick += DataGridView_CellContentClick;
this.Load += ProductsGrid_Load;
EnableDoubleBuffering();
}
private void EnableDoubleBuffering()
private void EnableDoubleBuffering()
{
var propertyInfo = _dataGridView.GetType().GetProperty("DoubleBuffered", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
@ -122,24 +128,13 @@ namespace LibationWinForms
#region UI display functions
public int Count { get; private set; }
private SortableBindingList<GridEntry> bindingList;
public void Display()
{
// don't return early if lib size == 0. this will not update correctly if all books are removed
var lib = DbContexts.GetLibrary_Flat_NoTracking();
Count = lib.Count;
// if no data. hide all columns. return
if (!lib.Any())
{
for (var i = _dataGridView.ColumnCount - 1; i >= 0; i--)
_dataGridView.Columns.RemoveAt(i);
return;
}
var orderedBooks = lib
// default load order
.OrderByDescending(lb => lb.DateAdded)
@ -150,10 +145,10 @@ namespace LibationWinForms
.ToList();
// BIND
if (bindingList is null)
bindToGrid(orderedBooks);
else
if (bindingList?.Count > 0)
updateGrid(orderedBooks);
else
bindToGrid(orderedBooks);
// FILTER
Filter();
@ -245,7 +240,8 @@ namespace LibationWinForms
#region Column Customizations
protected override void OnVisibleChanged(EventArgs e)
// to ensure this is only ever called once: Load instead of 'override OnVisibleChanged'
private void ProductsGrid_Load(object sender, EventArgs e)
{
contextMenuStrip1.Items.Add(new ToolStripLabel("Show / Hide Columns"));
contextMenuStrip1.Items.Add(new ToolStripSeparator());