Questions on UI for WinForms Forum

2 answers

182 views

Scroll state causes RadDropDownListElement to show incorrect value

I have a collection of custom visual items contained in a RadListView. These visual items consist of several RadTextBoxElements and a RadDropDownListElement. If a new item is added to the RadListView, say the drop down list item selected is different than the one above it, then the user scrolls up, the selected item of the drop down list for the next to last item becomes the selected item of the new item's drop down. Doing this again propagates it up the visual items.

I have debugged all code and determined that there are some inconsistencies in scrolling that seem to be making this happen. I can get around it if the scrollbar does not start at the bottom by setting focus to the first textbox in the visual item. This scrolls to the bottom and then I cannot reproduce.

What is happening here? Any ideas?

Below are my overridden CreateChileElements and SynchronizeProperties methods:

base.CreateChildElements();

//Setup the name label and field in a stack panel layout

this.nameStackPanelElement = new StackLayoutElement();

this.nameStackPanelElement.Orientation = Orientation.Horizontal;

this.nameStackPanelElement.ElementSpacing = 17;

this.nameStackPanelElement.StretchHorizontally = true;

this.nameLabelElement = new RadLabelElement();

this.nameLabelElement.Text = "Name";

this.nameLabelElement.AutoSize = true;

this.nameLabelElement.StretchHorizontally = false;

this.nameTextBoxElement = new RadTextBoxElement();

this.nameTextBoxElement.StretchHorizontally = true;

this.nameTextBoxElement.MinSize = new Size(120, 0);

this.nameTextBoxElement.TextBoxItem.MaxLength = 100;

this.nameTextBoxElement.TextBoxItem.LostFocus += new EventHandler(NameTextBoxItem_LostFocus);

this.nameTextBoxElement.TextChanged += new EventHandler(ImportantField_TextChanged);

this.nameStackPanelElement.Children.Add(this.nameLabelElement);

this.nameStackPanelElement.Children.Add(this.nameTextBoxElement);

//Setup the script label and field in a stack panel layout

this.scriptStackPanelElement = new StackLayoutElement();

this.scriptStackPanelElement.Orientation = Orientation.Horizontal;

this.scriptStackPanelElement.ElementSpacing = 18;

this.scriptStackPanelElement.StretchHorizontally = true;

this.scriptLabelElement = new RadLabelElement();

this.scriptLabelElement.Text = "Script";

this.scriptLabelElement.AutoSize = true;

this.scriptLabelElement.StretchHorizontally = false;

this.scriptTextBoxElement = new RadTextBoxElement();

this.scriptTextBoxElement.StretchHorizontally = true;

this.scriptTextBoxElement.MinSize = new Size(120, 0);

this.scriptTextBoxElement.TextBoxItem.MaxLength = 30;

this.scriptTextBoxElement.TextBoxItem.LostFocus += new EventHandler(ScriptTextBoxItem_LostFocus);

this.scriptTextBoxElement.TextChanged += new EventHandler(ImportantField_TextChanged);

this.scriptStackPanelElement.Children.Add(this.scriptLabelElement);

this.scriptStackPanelElement.Children.Add(this.scriptTextBoxElement);

//Setup the modifier label and drop down list in a stack panel layout

this.modifierStackPanelElement = new StackLayoutElement();

this.modifierStackPanelElement.Orientation = Orientation.Horizontal;

this.modifierStackPanelElement.ElementSpacing = 4;

this.modifierStackPanelElement.StretchHorizontally = true;

this.modifierLabelElement = new RadLabelElement();

this.modifierLabelElement.Text = "Modifier";

this.modifierLabelElement.AutoSize = true;

this.modifierLabelElement.StretchHorizontally = false;

this.modifierDropDownListElement = new RadDropDownListElement();

this.modifierDropDownListElement.StretchHorizontally = true;

this.modifierDropDownListElement.MinSize = new Size(60, 0);

this.modifierDropDownListElement.DropDownStyle = RadDropDownStyle.DropDownList;

this.modifierDropDownListElement.SelectedIndexChanged +=

new Telerik.WinControls.UI.Data.PositionChangedEventHandler(modifierDropDownListElement_SelectedIndexChanged);

this.modifierStackPanelElement.Children.Add(this.modifierLabelElement);

this.modifierStackPanelElement.Children.Add(this.modifierDropDownListElement);

//Fill the modifier drop down list and select the zeroth element

foreach (ModKeys mod in Enum.GetValues(typeof(ModKeys)))

{

this.modifierDropDownListElement.Items.Add(mod.ToString());

}

//Setup the key label and field in a stack panel layout

this.keyStackPanelElement = new StackLayoutElement();

this.keyStackPanelElement.Orientation = Orientation.Horizontal;

this.keyStackPanelElement.ElementSpacing = 4;

this.keyLabelElement = new RadLabelElement();

this.keyLabelElement.Text = "Key";

this.keyLabelElement.AutoSize = true;

this.keyLabelElement.StretchHorizontally = false;

this.keyTextBoxElement = new RadTextBoxElement();

this.keyTextBoxElement.StretchHorizontally = true;

this.keyTextBoxElement.MinSize = new Size(34, 0);

this.keyTextBoxElement.TextBoxItem.MaxLength = 1;

this.keyTextBoxElement.TextBoxItem.LostFocus += new EventHandler(KeyTextBoxItem_LostFocus);

this.keyTextBoxElement.TextChanged += new EventHandler(ImportantField_TextChanged);

this.keyStackPanelElement.Children.Add(this.keyLabelElement);

this.keyStackPanelElement.Children.Add(this.keyTextBoxElement);

//Combine the key and modifier panels into one stack panel layout

this.modifierKeyStackPanelElement = new StackLayoutElement();

this.modifierKeyStackPanelElement.Orientation = Orientation.Horizontal;

this.modifierKeyStackPanelElement.ElementSpacing = 4;

this.modifierKeyStackPanelElement.StretchHorizontally = true;

this.modifierKeyStackPanelElement.Children.Add(this.modifierStackPanelElement);

this.modifierKeyStackPanelElement.Children.Add(this.keyStackPanelElement);

//Setup the save and cancel buttons in a stack panel layout

this.newButtonsStackPanelElement = new StackLayoutElement();

this.newButtonsStackPanelElement.Orientation = Orientation.Horizontal;

this.newButtonsStackPanelElement.ElementSpacing = 4;

this.newButtonsStackPanelElement.StretchHorizontally = true;

Padding newButtonsStackMargin = this.newButtonsStackPanelElement.Margin;

this.newButtonsStackPanelElement.Margin = new Padding(52, newButtonsStackMargin.Top,

-12, newButtonsStackMargin.Bottom);

this.saveButtonElement = new RadButtonElement("Save");

this.saveButtonElement.Enabled = false;

this.saveButtonElement.Click += new EventHandler(saveButtonElement_Click);

this.cancelButtonElement = new RadButtonElement("Cancel");

this.cancelButtonElement.Click += new EventHandler(deleteCancelButtonElement_Click);

this.newButtonsStackPanelElement.Children.Add(this.saveButtonElement);

this.newButtonsStackPanelElement.Children.Add(this.cancelButtonElement);

//Setup the insert and delete buttons in a stack panel layout and set them

//to collapsed initially.

this.existingButtonsStackPanelElement = new StackLayoutElement();

this.existingButtonsStackPanelElement.Orientation = Orientation.Horizontal;

this.existingButtonsStackPanelElement.Visibility = ElementVisibility.Collapsed;

this.existingButtonsStackPanelElement.ElementSpacing = 4;

this.existingButtonsStackPanelElement.StretchHorizontally = true;

Padding existingButtonsStackMargin = this.existingButtonsStackPanelElement.Margin;

this.existingButtonsStackPanelElement.Margin = new Padding(52, existingButtonsStackMargin.Top - 4,

-12, existingButtonsStackMargin.Bottom + 4);

this.insertButtonElement = new RadButtonElement("Insert");

this.insertButtonElement.Click += new EventHandler(insertButtonElement_Click);

this.deleteButtonElement = new RadButtonElement("Delete");

this.deleteButtonElement.Click += new EventHandler(deleteCancelButtonElement_Click);

this.existingButtonsStackPanelElement.Children.Add(this.insertButtonElement);

this.existingButtonsStackPanelElement.Children.Add(this.deleteButtonElement);

//Setup the separator that will separate this item from the one below it

this.itemSeparator = new SeparatorElement();

this.itemSeparator.StretchHorizontally = true;

this.itemSeparator.Line1.BackColor = Color.FromArgb(76, 76, 76);

//Padding separatorMargin = itemSeparator.Margin;

//this.itemSeparator.Margin = new Padding(separatorMargin.Left, separatorMargin.Top + 4, separatorMargin.Right, separatorMargin.Bottom);

//Setup the outermost stack panel layout element and add all

//of the other stack panel layout elements as its children.

this.parentStackPanelElement = new StackLayoutElement();

this.parentStackPanelElement.Orientation = Orientation.Vertical;

this.parentStackPanelElement.ElementSpacing = 4;

this.parentStackPanelElement.Margin = new Padding(4);

this.parentStackPanelElement.StretchHorizontally = true;

this.parentStackPanelElement.Children.Add(this.nameStackPanelElement);

this.parentStackPanelElement.Children.Add(this.scriptStackPanelElement);

this.parentStackPanelElement.Children.Add(this.modifierKeyStackPanelElement);

this.parentStackPanelElement.Children.Add(this.newButtonsStackPanelElement);

this.parentStackPanelElement.Children.Add(this.existingButtonsStackPanelElement);

this.parentStackPanelElement.Children.Add(this.itemSeparator);

//Finally, add the outermost stack panel layout element to the

//SimpleListViewVisualItem's Children

this.Children.Add(this.parentStackPanelElement);

lock (Program.scriptsLockObject)

{

base.SynchronizeProperties();

this.Text = "";

this.Script = this.Data.Value as Script;

if (this.Script != null)

{

if (this.Script.IsNew)

{

this.newButtonsStackPanelElement.Visibility = ElementVisibility.Visible;

this.existingButtonsStackPanelElement.Visibility = ElementVisibility.Collapsed;

//if (!this.IsElementVisible)

//{

//}

this.nameTextBoxElement.Focus();

}

else

{

this.newButtonsStackPanelElement.Visibility = ElementVisibility.Collapsed;

this.existingButtonsStackPanelElement.Visibility = ElementVisibility.Visible;

this.insertButtonElement.Enabled = !string.IsNullOrWhiteSpace(this.Script.ScriptText);

}

this.nameTextBoxElement.Text = this.Script.Name;

this.scriptTextBoxElement.Text = this.Script.ScriptText;

this.modifierDropDownListElement.SelectedIndex = (int)this.Script.KeyModifier;

this.keyTextBoxElement.Text = this.Script.Key;

}

ListView

answered on 16 Mar 2012

2 answers

183 views

Multiple summary rows

Hello,

during the development of a WinForms application for our customer the following problem arose when using multiple summary rows in grid:

1) the attached picture shows existing grid with 2 summary rows. The requirement is that first summary row sums data only from even rows and the second summary row sums data only from odd rows. Is it possible to achieve these "filtered" sums? The grid is bound with custom objects which contain a boolean value which would serve as a basis for addition of data (DataBoundItem).

2) how can custom style be applied to specific summary row when using multiple summary rows (in our scenario the first summary row should be blue and the second one red)?

GridView

answered on 16 Mar 2012

2 answers

205 views

Different child templates on second level hierarchical model

Hi,

Is it possible to configure RadGridView to have different child templates on the same level of hierarchical data rows? Or to have different columns collections for each group?

I want to accomplish something like this:

[Data model]
Class Flat
{
string name;
List<Room> rooms;
}

Class Room
{
string name;
bool table;
bool bath;
bool desk;
int walls;
}

[View]

1. Expandable rows with objects "Flat" (visible columns: Name)
2. Second hierarchy with rooms, but on this level different columns visible for every room type:

If room name is "Bathroom" then columns are: name, bath, walls.
If room name is "Saloon" then columns are: name, table, walls.
etc.

Is it feasible on one grid?

Best Regards
Krzysztof

GridView

answered on 16 Mar 2012

4 answers

240 views

Number formatting

Is it possible to format a column using number formats or date formats?

Thanks,

Javier Gonzalez de Aragon

ListView

answered on 16 Mar 2012

3 answers

275 views

Custom sorting in DetailView?

I understand you can perform custom sorting using a grid and a tree but how do you do this from within a RadListView? Basically I have a bound column that contains strings, some are words, some are numbers. I need to sort them in a "unique" manner. Can I pass a column a custom sort method or hook a sort event or pass a custom sort descriptor or ???

ListView

answered on 16 Mar 2012

3 answers

153 views

Reload HostWindow data

Hello,

I was wondering if anyone has any experience reloading a HostWindow. I can get the HostWindows I need from my DockWindows, gather the info I need from it, close the the HostWindow, make my new calculations, create a new HostWindow and add it to the Dock. However, this just puts the new HostWindow on the most recent document that had focus. What I want is for the new HostWindow to show up/refresh in the same spot. Does anyone know if this is possible?

This is what I was thinking; but it leaves the old HostWindow in the Dock and does not seem to add the "new" HostWindow to the dock.

//set the current window to a host window, if not a host window will return null

HostWindow hw = this.dockMain.DockWindows[i] as HostWindow;

//creates new form in hostwindow

hw = new HostWindow(createRightForm(tempModel, formName));

If you need anymore info from me just let me know. Thanks.

Dock

answered on 16 Mar 2012

5 answers

684 views

Autoscroll

How do i get scroll bars to appear on a radribbonform.
I have a simple project with a radribbon form and a rad panel
I have set autoscroll to true but the scroll bars do not appear as the form is resized

RibbonBar

answered on 16 Mar 2012

1 answer

161 views

RadChart Programmatically

Is there a way to write this in winforms. I got this example from silverlight docs.

Private Function CreateChart_DefaultView() As Telerik.Windows.Controls.RadChart

Dim telerikChart As New Telerik.Windows.Controls.RadChart()

'Chart Title

telerikChart.DefaultView.ChartTitle.Content = "Year 2009"

telerikChart.DefaultView.ChartTitle.HorizontalAlignment = HorizontalAlignment.Center

'Chart Legend

telerikChart.DefaultView.ChartLegend.UseAutoGeneratedItems = True

'Line Chart

Dim lineSeries As New DataSeries()

lineSeries.LegendLabel = "Turnover"

lineSeries.Definition = New LineSeriesDefinition()

Dim dataPoint As New DataPoint()

dataPoint.YValue = 154

dataPoint.XCategory = "Jan"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 138

dataPoint.XCategory = "Feb"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 143

dataPoint.XCategory = "Mar"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 120

dataPoint.XCategory = "Apr"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 135

dataPoint.XCategory = "May"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 125

dataPoint.XCategory = "Jun"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 179

dataPoint.XCategory = "Jul"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 170

dataPoint.XCategory = "Aug"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 198

dataPoint.XCategory = "Sep"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 187

dataPoint.XCategory = "Sep"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 193

dataPoint.XCategory = "Nov"

lineSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 176

dataPoint.XCategory = "Dec"

lineSeries.Add(dataPoint)

telerikChart.DefaultView.ChartArea.DataSeries.Add(lineSeries)

'Bar Chart

Dim barSeries As New DataSeries()

barSeries.LegendLabel = "Expenses"

barSeries.Definition = New BarSeriesDefinition()

dataPoint = New DataPoint()

dataPoint.YValue = 45

dataPoint.XCategory = "Jan"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 48

dataPoint.XCategory = "Feb"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 53

dataPoint.XCategory = "Mar"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 41

dataPoint.XCategory = "Apr"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 32

dataPoint.XCategory = "May"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 28

dataPoint.XCategory = "Jun"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 63

dataPoint.XCategory = "Jul"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 74

dataPoint.XCategory = "Aug"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 77

dataPoint.XCategory = "Sep"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 85

dataPoint.XCategory = "Oct"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 89

dataPoint.XCategory = "Nov"

barSeries.Add(dataPoint)

dataPoint = New DataPoint()

dataPoint.YValue = 80

dataPoint.XCategory = "Dec"

barSeries.Add(dataPoint)

telerikChart.DefaultView.ChartArea.DataSeries.Add(barSeries)

Return telerikChart

End Function

I am well versed on using winforms chart control. I would like to do the same using RadChart. A few examples would be nice. Thank you.

G

Chart (obsolete as of Q1 2013)

answered on 16 Mar 2012

1 answer

147 views

Drag Drop Column to other Control

Hi

I need to "drag and drop" columns from a gridview to another control; for example a simple text box that just prints the header name when the column is droped on to it.

I have mined the posts here and the WinFroms demo, all implementing on the drag and drop service:
RadDragDropService dragDropService = this.radGridView1.GridViewElement.GetService<RadDragDropService>();
dragDropService.PreviewDragOver += new System.EventHandler<RadDragOverEventArgs>(dragDropService_PreviewDragOver);
dragDropService.PreviewDragDrop += new System.EventHandler<RadDropEventArgs>(dragDropService_PreviewDragDrop);

However, it seems that PreviewDragOver and PreviewDragDrop events are fired only when hitting on the listed members here:
http://www.telerik.com/help/winforms/t_telerik_wincontrols_ui_listcontroldragdropservice.html

and not a textbox or other generic container.

My question is: is there anyway i can allow and detect a column drop using some other code OR implement a new control that will implement the radservice

Thanks in advance.

GridView

answered on 16 Mar 2012

8 answers

361 views

RadDropDownListEditorElement.Filter

I am using a licensed version of 2011.Q2 so it's not the latest but it's all that I have for the time being.

I set a filter callback for a ComboBoxColumn in the CellEditorInitialized event handler like this:

RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;

if (editor != null)

{

RadDropDownListEditorElement editorElement = (RadDropDownListEditorElement)editor.EditorElement;

editorElement.Filter = FilterWrappers;

}

This works fine. The problem is that I have another ComboBoxColumn with no filter on it. When I click in the first column and select a value and then click in the second column the filter method for the first column is called. It is called once for every item in the combo but the entries contain items from the first combo and items from the second combo. Why is this happening?

GridView

answered on 15 Mar 2012