Beispiel #1
0
        public DragDropSection()
        {
            // drag data object

            showDragOverEvents = new CheckBox {
                Text = "Show DragOver Events"
            };
            var includeImageCheck = new CheckBox {
                Text = "Include Image"
            };

            descriptionTextBox = new TextBox {
                PlaceholderText = "Format", ToolTip = "Add {0} to insert inner text into the description, e.g. 'Move to {0}'"
            };
            innerTextBox = new TextBox {
                PlaceholderText = "Inner", ToolTip = "Highlighted text to insert into description"
            };
            var textBox = new TextBox {
                Text = "Some text"
            };

            allowedEffectDropDown = new EnumDropDown <DragEffects> {
                SelectedValue = DragEffects.All
            };
            dragEnterEffect = new EnumDropDown <DragEffects?> {
                SelectedValue = DragEffects.Copy
            };
            dragOverEffect = new EnumDropDown <DragEffects?> {
                SelectedValue = null
            };
            writeDataCheckBox = new CheckBox {
                Text = "Write data to log"
            };
            useDragImage = new CheckBox {
                Text = "Use custom drag image"
            };
            imageOffset = new PointEntry {
                Value = new Point(80, 80)
            };
            imageOffset.Bind(c => c.Enabled, useDragImage, c => c.Checked);

            var htmlTextArea = new TextArea {
                Height = 24
            };
            var selectFilesButton = new Button {
                Text = "Select Files"
            };

            Uri[] fileUris = null;
            selectFilesButton.Click += (sender, e) =>
            {
                var ofd = new OpenFileDialog();
                ofd.MultiSelect = true;
                ofd.ShowDialog(this);
                fileUris = ofd.Filenames.Select(r => new Uri(r)).ToArray();
                if (fileUris.Length == 0)
                {
                    fileUris = null;
                }
            };

            var urlTextBox = new TextBox();

            DataObject CreateDataObject()
            {
                var data = new DataObject();

                if (!string.IsNullOrEmpty(textBox.Text))
                {
                    data.Text = textBox.Text;
                }
                var uris = new List <Uri>();

                if (fileUris != null)
                {
                    uris.AddRange(fileUris);
                }
                if (Uri.TryCreate(urlTextBox.Text, UriKind.Absolute, out var uri))
                {
                    uris.Add(uri);
                }
                if (uris.Count > 0)
                {
                    data.Uris = uris.ToArray();
                }
                if (!string.IsNullOrEmpty(htmlTextArea.Text))
                {
                    data.Html = htmlTextArea.Text;
                }
                if (includeImageCheck.Checked == true)
                {
                    data.Image = TestIcons.Logo;
                }

                return(data);
            }

            // sources

            var buttonSource = new Button {
                Text = "Source"
            };

            buttonSource.MouseDown += (sender, e) =>
            {
                if (e.Buttons != MouseButtons.None)
                {
                    DoDragDrop(buttonSource, CreateDataObject());
                    e.Handled = true;
                }
            };

            var panelSource = new Panel {
                BackgroundColor = Colors.Red, Size = new Size(50, 50)
            };

            panelSource.MouseMove += (sender, e) =>
            {
                if (e.Buttons != MouseButtons.None)
                {
                    DoDragDrop(panelSource, CreateDataObject());
                    e.Handled = true;
                }
            };

            var treeSource = new TreeGridView {
                Size = new Size(200, 200)
            };

            treeSource.SelectedItemsChanged += (sender, e) => Log.Write(treeSource, $"TreeGridView.SelectedItemsChanged (source) Rows: {string.Join(", ", treeSource.SelectedRows.Select(r => r.ToString()))}");
            treeSource.DataStore             = CreateTreeData();
            SetupTreeColumns(treeSource);
            treeSource.MouseMove += (sender, e) =>
            {
                if (e.Buttons == MouseButtons.Primary && !treeSource.IsEditing)
                {
                    var cell = treeSource.GetCellAt(e.Location);
                    if (cell.Item == null || cell.ColumnIndex == -1)
                    {
                        return;
                    }
                    var data     = CreateDataObject();
                    var selected = treeSource.SelectedItems.OfType <TreeGridItem>().Select(r => (string)r.Values[0]);
                    data.SetString(string.Join(";", selected), "my.tree.data");

                    DoDragDrop(treeSource, data);
                    e.Handled = true;
                }
            };

            var gridSource = new GridView {
            };

            gridSource.SelectedRowsChanged += (sender, e) => Log.Write(gridSource, $"GridView.SelectedItemsChanged (source): {string.Join(", ", gridSource.SelectedRows.Select(r => r.ToString()))}");
            SetupGridColumns(gridSource);
            gridSource.DataStore  = CreateGridData();
            gridSource.MouseMove += (sender, e) =>
            {
                if (e.Buttons == MouseButtons.Primary && !gridSource.IsEditing)
                {
                    var cell = gridSource.GetCellAt(e.Location);
                    if (cell.RowIndex == -1 || cell.ColumnIndex == -1)
                    {
                        return;
                    }
                    var data     = CreateDataObject();
                    var selected = gridSource.SelectedItems.OfType <GridItem>().Select(r => (string)r.Values[0]);
                    data.SetString(string.Join(";", selected), "my.grid.data");

                    DoDragDrop(gridSource, data);
                    e.Handled = true;
                }
            };


            // destinations

            var buttonDestination = new Button {
                Text = "Drop here!", AllowDrop = true
            };

            buttonDestination.DragEnter += (sender, e) => buttonDestination.Text = "Now, drop it!";
            buttonDestination.DragLeave += (sender, e) => buttonDestination.Text = "Drop here!";
            LogEvents(buttonDestination);

            var drawableDest = new Drawable {
                BackgroundColor = Colors.Blue, AllowDrop = true, Size = new Size(50, 50)
            };

            LogEvents(drawableDest);
            drawableDest.DragEnter += (sender, e) =>
            {
                if (e.Effects != DragEffects.None)
                {
                    drawableDest.BackgroundColor = Colors.Green;
                }
            };
            drawableDest.DragLeave += (sender, e) =>
            {
                if (e.Effects != DragEffects.None)
                {
                    drawableDest.BackgroundColor = Colors.Blue;
                }
            };
            drawableDest.DragDrop += (sender, e) =>
            {
                if (e.Effects != DragEffects.None)
                {
                    drawableDest.BackgroundColor = Colors.Blue;
                }
            };

            var dragMode = new RadioButtonList
            {
                Orientation = Orientation.Vertical,
                Items       =
                {
                    new ListItem {
                        Text = "No Restriction", Key = ""
                    },
                    new ListItem {
                        Text = "RestrictToOver", Key = "over"
                    },
                    new ListItem {
                        Text = "RestrictToInsert", Key = "insert"
                    },
                    new ListItem {
                        Text = "RestrictToNode", Key = "node"
                    },
                    new ListItem {
                        Text = "No Node", Key = "none"
                    }
                },
                SelectedIndex = 0
            };
            var treeDest = new TreeGridView {
                AllowDrop = true, Size = new Size(200, 200)
            };
            var treeDestData = CreateTreeData();

            treeDest.DataStore = treeDestData;
            treeDest.DragOver += (sender, e) =>
            {
                var info = treeDest.GetDragInfo(e);
                if (info == null)
                {
                    return;                     // not supported
                }
                switch (dragMode.SelectedKey)
                {
                case "over":
                    info.RestrictToOver();
                    break;

                case "insert":
                    info.RestrictToInsert();
                    break;

                case "node":
                    info.RestrictToNode(treeDestData[2]);
                    break;

                case "none":
                    info.Item = info.Parent = null;
                    break;
                }
            };
            SetupTreeColumns(treeDest);
            LogEvents(treeDest);

            var gridDest = new GridView {
                AllowDrop = true
            };
            var gridDestData = CreateGridData();

            gridDest.DataStore = gridDestData;
            gridDest.DragOver += (sender, e) =>
            {
                var info = gridDest.GetDragInfo(e);
                if (info == null)
                {
                    return;                     // not supported
                }
                switch (dragMode.SelectedKey)
                {
                case "over":
                    info.RestrictToOver();
                    break;

                case "insert":
                    info.RestrictToInsert();
                    break;

                case "node":
                    info.Index    = 2;
                    info.Position = GridDragPosition.Over;
                    break;

                case "none":
                    info.Index = -1;
                    break;
                }
            };
            SetupGridColumns(gridDest);
            LogEvents(gridDest);



            // layout

            var layout = new DynamicLayout {
                Padding = 10, DefaultSpacing = new Size(4, 4)
            };

            layout.BeginHorizontal();

            layout.BeginScrollable(BorderType.None);
            layout.BeginCentered();

            layout.AddSeparateRow(showDragOverEvents);
            layout.AddSeparateRow("AllowedEffect", allowedEffectDropDown, null);
            layout.BeginVertical();
            layout.AddRow("DropDescription", descriptionTextBox);
            layout.AddRow(new Panel(), innerTextBox);
            layout.EndVertical();
            layout.AddSeparateRow("DragEnter Effect", dragEnterEffect, null);
            layout.AddSeparateRow("DragOver Effect", dragOverEffect, null);
            layout.AddSeparateRow(useDragImage);
            layout.AddSeparateRow("Image offset:", imageOffset);
            layout.AddSeparateRow(writeDataCheckBox);

            layout.BeginGroup("DataObject", 10);
            layout.AddRow("Text", textBox);
            layout.AddRow("Html", htmlTextArea);
            layout.AddRow("Url", urlTextBox);
            layout.BeginHorizontal();
            layout.AddSpace();
            layout.BeginVertical();
            layout.AddCentered(includeImageCheck);
            layout.AddCentered(selectFilesButton);
            layout.EndVertical();
            layout.EndGroup();
            layout.Add(dragMode);
            layout.AddSpace();

            layout.EndCentered();
            layout.EndScrollable();

            layout.BeginVertical(xscale: true);
            layout.AddRange("Drag sources:", buttonSource, panelSource);
            layout.Add(treeSource, yscale: true);
            layout.Add(gridSource, yscale: true);
            layout.EndVertical();

            layout.BeginVertical(xscale: true);
            layout.AddRange("Drag destinations:", buttonDestination, drawableDest);
            layout.Add(treeDest, yscale: true);
            layout.Add(gridDest, yscale: true);
            layout.EndVertical();

            layout.EndHorizontal();

            Content = layout;
        }
Beispiel #2
0
        public DragDropSection()
        {
            // drag data object

            showDragOverEvents = new CheckBox {
                Text = "Show DragOver Events"
            };
            var includeImageCheck = new CheckBox {
                Text = "Include Image"
            };
            var textBox = new TextBox {
                Text = "Some text"
            };
            var allowedEffectDropDown = new EnumDropDown <DragEffects> {
                SelectedValue = DragEffects.All
            };

            dragOverEffect = new EnumDropDown <DragEffects> {
                SelectedValue = DragEffects.Copy
            };

            var htmlTextArea      = new TextArea();
            var selectFilesButton = new Button {
                Text = "Select Files"
            };

            Uri[] uris = null;
            selectFilesButton.Click += (sender, e) =>
            {
                var ofd = new OpenFileDialog();
                ofd.MultiSelect = true;
                ofd.ShowDialog(this);
                uris = ofd.Filenames.Select(r => new Uri(r)).ToArray();
                if (uris.Length == 0)
                {
                    uris = null;
                }
            };

            Func <DataObject> createDataObject = () =>
            {
                var data = new DataObject();
                if (!string.IsNullOrEmpty(textBox.Text))
                {
                    data.Text = textBox.Text;
                }
                if (uris != null)
                {
                    data.Uris = uris;
                }
                if (!string.IsNullOrEmpty(htmlTextArea.Text))
                {
                    data.Html = htmlTextArea.Text;
                }
                if (includeImageCheck.Checked == true)
                {
                    data.Image = TestIcons.Logo;
                }
                return(data);
            };

            // sources

            var buttonSource = new Button {
                Text = "Source"
            };

            buttonSource.MouseDown += (sender, e) =>
            {
                buttonSource.DoDragDrop(createDataObject(), allowedEffectDropDown.SelectedValue);
                e.Handled = true;
            };

            var panelSource = new Panel {
                BackgroundColor = Colors.Red, Size = new Size(50, 50)
            };

            panelSource.MouseDown += (sender, e) =>
            {
                panelSource.DoDragDrop(createDataObject(), allowedEffectDropDown.SelectedValue);
                e.Handled = true;
            };

            var treeSource = new TreeGridView {
                Size = new Size(200, 200)
            };

            treeSource.DataStore = CreateTreeData();
            SetupTreeColumns(treeSource);
            treeSource.MouseMove += (sender, e) =>
            {
                if (e.Buttons == MouseButtons.Primary)
                {
                    var cell = treeSource.GetCellAt(e.Location);
                    if (cell.Item == null || cell.ColumnIndex == -1)
                    {
                        return;
                    }
                    var data     = createDataObject();
                    var selected = treeSource.SelectedItems.OfType <TreeGridItem>().Select(r => (string)r.Values[0]);
                    data.SetString(string.Join(";", selected), "my-tree-data");

                    treeSource.DoDragDrop(data, allowedEffectDropDown.SelectedValue);
                    e.Handled = true;
                }
            };

            var gridSource = new GridView {
            };

            SetupGridColumns(gridSource);
            gridSource.DataStore  = CreateGridData();
            gridSource.MouseMove += (sender, e) =>
            {
                if (e.Buttons == MouseButtons.Primary)
                {
                    var data     = createDataObject();
                    var selected = gridSource.SelectedItems.OfType <GridItem>().Select(r => (string)r.Values[0]);
                    data.SetString(string.Join(";", selected), "my-grid-data");

                    gridSource.DoDragDrop(data, allowedEffectDropDown.SelectedValue);
                    e.Handled = true;
                }
            };


            // destinations

            var buttonDestination = new Button {
                Text = "Drop here!", AllowDrop = true
            };

            buttonDestination.DragEnter += (sender, e) => buttonDestination.Text = "Now, drop it!";
            buttonDestination.DragLeave += (sender, e) => buttonDestination.Text = "Drop here!";
            LogEvents(buttonDestination);

            var drawableDest = new Drawable {
                BackgroundColor = Colors.Blue, AllowDrop = true, Size = new Size(50, 50)
            };

            LogEvents(drawableDest);
            drawableDest.DragEnter += (sender, e) =>
            {
                if (e.Effects != DragEffects.None)
                {
                    drawableDest.BackgroundColor = Colors.Green;
                }
            };
            drawableDest.DragLeave += (sender, e) =>
            {
                if (e.Effects != DragEffects.None)
                {
                    drawableDest.BackgroundColor = Colors.Blue;
                }
            };
            drawableDest.DragDrop += (sender, e) =>
            {
                if (e.Effects != DragEffects.None)
                {
                    drawableDest.BackgroundColor = Colors.Blue;
                }
            };

            var dragMode = new RadioButtonList
            {
                Orientation = Orientation.Vertical,
                Items       =
                {
                    new ListItem {
                        Text = "No Restriction", Key = ""
                    },
                    new ListItem {
                        Text = "RestrictToOver", Key = "over"
                    },
                    new ListItem {
                        Text = "RestrictToInsert", Key = "insert"
                    },
                    new ListItem {
                        Text = "RestrictToNode", Key = "node"
                    },
                    new ListItem {
                        Text = "No Node", Key = "none"
                    }
                },
                SelectedIndex = 0
            };
            var treeDest = new TreeGridView {
                AllowDrop = true, Size = new Size(200, 200)
            };
            var treeDestData = CreateTreeData();

            treeDest.DataStore = treeDestData;
            treeDest.DragOver += (sender, e) =>
            {
                var info = treeDest.GetDragInfo(e);
                if (info == null)
                {
                    return;                     // not supported
                }
                switch (dragMode.SelectedKey)
                {
                case "over":
                    info.RestrictToOver();
                    break;

                case "insert":
                    info.RestrictToInsert();
                    break;

                case "node":
                    info.RestrictToNode(treeDestData[2]);
                    break;

                case "none":
                    info.Item = info.Parent = null;
                    break;
                }
            };
            SetupTreeColumns(treeDest);
            LogEvents(treeDest);

            var gridDest = new GridView {
                AllowDrop = true
            };
            var gridDestData = CreateGridData();

            gridDest.DataStore = gridDestData;
            gridDest.DragOver += (sender, e) =>
            {
                var info = gridDest.GetDragInfo(e);
                if (info == null)
                {
                    return;                     // not supported
                }
                switch (dragMode.SelectedKey)
                {
                case "over":
                    info.RestrictToOver();
                    break;

                case "insert":
                    info.RestrictToInsert();
                    break;

                case "node":
                    info.Index    = 2;
                    info.Position = GridDragPosition.Over;
                    break;

                case "none":
                    info.Index = -1;
                    break;
                }
            };
            SetupGridColumns(gridDest);
            LogEvents(gridDest);



            // layout

            var layout = new DynamicLayout {
                Padding = 10, DefaultSpacing = new Size(4, 4)
            };

            layout.BeginHorizontal();

            layout.BeginCentered();

            layout.AddSeparateRow(showDragOverEvents);
            layout.AddSeparateRow("AllowedEffect", allowedEffectDropDown, null);
            layout.AddSeparateRow("DragOver Effect", dragOverEffect, null);

            layout.BeginGroup("DataObject", 10);
            layout.AddRow("Text", textBox);
            layout.AddRow("Html", htmlTextArea);
            layout.BeginHorizontal();
            layout.AddSpace();
            layout.BeginVertical();
            layout.AddCentered(includeImageCheck);
            layout.AddCentered(selectFilesButton);
            layout.EndVertical();
            layout.EndGroup();
            layout.Add(dragMode);
            layout.AddSpace();

            layout.EndCentered();

            layout.BeginVertical(xscale: true);
            layout.AddRange("Drag sources:", buttonSource, panelSource);
            layout.Add(treeSource, yscale: true);
            layout.Add(gridSource, yscale: true);
            layout.EndVertical();

            layout.BeginVertical(xscale: true);
            layout.AddRange("Drag destinations:", buttonDestination, drawableDest);
            layout.Add(treeDest, yscale: true);
            layout.Add(gridDest, yscale: true);
            layout.EndVertical();

            layout.EndHorizontal();

            Content = layout;
        }