I'm using the following code to show a tooltip on a disabled CheckBox which is placed inside a GroupBox.
Howeven the tooltip displays when i move the mouse over the CheckBox only if i first click outside the GroupBox and then i drag the mouse arrow over the CheckBox.
It's like if the GroupBox is covering the main panel of the dialog and it's not triggering the event.
But GroupBox has no MouseMove event, so i'm wondering how to fix this.
delegate void SetToolTipDelegate(ToolTip^ tooltip, Control^ control, String^ text);
void SetToolTip(ToolTip^ tooltip, Control^ control, String^ text)
{
if (control->InvokeRequired)
{
SetToolTipDelegate^ d = gcnew SetToolTipDelegate(this, &MyForm::SetToolTip);
this->Invoke(d, gcnew cli::array<Object^> { tooltip, control, text });
}
else
{
tooltip->SetToolTip(control, text);
}
}
bool isShown;
System::Void MyForm_MouseMove(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e) {
System::Drawing::Point p = this->checkBox1->Location;
System::Drawing::Point g = this->groupBox1->Location;
System::Drawing::Rectangle r = this->checkBox1->ClientRectangle;
if ((e->X >= (p.X + g.X)) && (e->X <= (p.X + g.X + r.Width)) && (e->Y >= (p.Y + g.Y)) && (e->Y <= (p.Y + g.Y + r.Height)))
{
if (!isShown) {
SetToolTip(this->toolTip1, this->checkBox1, "Here my tooltip text...");
this->toolTip1->Show("Here my tooltip text...", this->checkBox1, r.Width / 2, r.Height / 2);
isShown = TRUE;
}
}
else
{
this->toolTip1->Hide(this->checkBox1);
isShown = FALSE;
}
}
Adding this (using the same callback for the Form and the GroupBox) did the trick:
this->groupBox1->MouseMove += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::MyForm_MouseMove);
Related
I am working on a "bottom-right docked" popup form.
The layout of the form follows this structure:
Header
Content (text message)
Footer
This form should resize according to its content.
I am using SetBounds to make it grow to the top instead of the bottom (remember that the window is docked bottom-right).
However, when the animation occurs, the footer redraws itself in a very bad way, as its form-relative location is continuously updated.
I provide a sample to give you an idea:
using System.Windows.Forms;
namespace AnimatorTest
{
public class Form3 : Form
{
Timer timer = new Timer();
public Form3()
{
timer.Interval = 30;
timer.Tick += timer_Tick;
// Create 3 test buttons
for (int i = 0; i < 3; i++)
{
Button b = new Button() { Dock = DockStyle.Bottom };
b.Click += (s, e) => timer.Start();
b.Text = "Click and watch how ugly I am during the animation.";
Controls.Add(b);
}
Height = 100;
StartPosition = FormStartPosition.CenterScreen;
}
void timer_Tick(object sender, System.EventArgs e)
{
int desiredHeight = 500;
int difference = desiredHeight - Height;
int change = difference / 6;
if (System.Math.Abs(change) < 1)
{
SetBounds(Left, Top - difference, Width, Height + difference);
timer.Stop();
}
else
{
SetBounds(Left, Top - change, Width, Height + change);
}
}
}
}
I don't really have any idea to work around this.
Thanks.
I need to programming change the border color of some cells in the CellFormatting event. Can the board color of an individual cell be changed?
You can draw a rectangle. In this example I put a red boder on the selected cells.
private void dataGridView_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
{
if (e.RowIndex >= 0 && e.ColumnIndex >= 0)
{
if (dataGridView.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected == true)
{
e.Paint(e.CellBounds, DataGridViewPaintParts.All & ~DataGridViewPaintParts.Border);
using (Pen p = new Pen(Color.Red, 1))
{
Rectangle rect = e.CellBounds;
rect.Width -= 2;
rect.Height -= 2;
e.Graphics.DrawRectangle(p, rect);
}
e.Handled = true;
}
}
}
MSDN describes a method where you can inherit from the DataGridView to override the default border styles: DataGridViewAdvancedBorderStyle Class
The painting method above is simpler, though.
This is not working for me, focus on radio button only works when pressed the Tab key! Does anyone know how to fix?
void SelectPaymentModeView_Loaded(object sender, RoutedEventArgs e)
{
this.radPaymentMode.Focus();
}
The contents of the radiobutton is text... I also try Keyboard.Focus(this.radPaymentMode);
See the complete code:
PaymentMode[] modes = data[1] as PaymentMode[];
if (modes.Length > 0)
{
for (int i = 0; i < modes.Length; i++)
{
RadioButton rad = new RadioButton();
rad.Name = "radPayment" + i;
rad.GroupName = "PaymentModes";
rad.Content = modes[i].Name;
rad.DataContext = modes[i];
rad.Margin = new Thickness(110, 0, 0, 5);
rad.VerticalAlignment = System.Windows.VerticalAlignment.Center;
rad.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
Grid.SetRow(rad, 3 + i);
Grid.SetColumn(rad, 1);
gridPaymentModes.RowDefinitions.Insert(3, new RowDefinition());
gridPaymentModes.Children.Add(rad);
radPaymentModes.Add(rad);
if (!string.IsNullOrEmpty((this.DataContext as Order).Payment))
{
String paymentOrder = rad.Content as String;
if (paymentOrder.Equals((this.DataContext as Order).Payment))
{
rad.IsChecked = true;
}
}
rad.Checked += new RoutedEventHandler(rad_Checked);
}
radPaymentModes[0].Loaded += SelectPaymentModeView_Loaded;
}
void SelectPaymentModeView_Loaded(object sender, RoutedEventArgs e)
{
FocusManager.SetFocusedElement(FocusManager.GetFocusScope((sender as RadioButton)), (sender as RadioButton));
}
The keyboard focus manager makes the dotted focus adorner visible when the keyboard is used to tab to a control (WPF wants to hide the focus rect when the mouse is used for example so there's less visual clutter).
To force it, use code like this (assuming btnRadio is your button):
FocusManager.SetFocusedElement(FocusManager.GetFocusScope(btnRadio), btnRadio);
It seems like a simple question but how do I set the bacground color of the 'tab control', it seems to be derived from the standard window theme color. Is it Possible to create a black tab control with white text written on the tabs themselves (not the tab page)?
Help, I,m a little familiar with custom controls extending existing controls but I don't know what properties (if they exist) to set.
http://dotnetrix.co.uk/tabcontrol.htm
private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
TabPage CurrentTab = tabControl1.TabPages[e.Index];
Rectangle ItemRect = tabControl1.GetTabRect(e.Index);
SolidBrush FillBrush = new SolidBrush(Color.Red);
SolidBrush TextBrush = new SolidBrush(Color.White);
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
//If we are currently painting the Selected TabItem we'll
//change the brush colors and inflate the rectangle.
if (System.Convert.ToBoolean(e.State & DrawItemState.Selected))
{
FillBrush.Color = Color.White;
TextBrush.Color = Color.Red;
ItemRect.Inflate(2, 2);
}
//Set up rotation for left and right aligned tabs
if (tabControl1.Alignment == TabAlignment.Left || tabControl1.Alignment == TabAlignment.Right)
{
float RotateAngle = 90;
if (tabControl1.Alignment == TabAlignment.Left)
RotateAngle = 270;
PointF cp = new PointF(ItemRect.Left + (ItemRect.Width / 2), ItemRect.Top + (ItemRect.Height / 2));
e.Graphics.TranslateTransform(cp.X, cp.Y);
e.Graphics.RotateTransform(RotateAngle);
ItemRect = new Rectangle(-(ItemRect.Height / 2), -(ItemRect.Width / 2), ItemRect.Height, ItemRect.Width);
}
//Next we'll paint the TabItem with our Fill Brush
e.Graphics.FillRectangle(FillBrush, ItemRect);
//Now draw the text.
e.Graphics.DrawString(CurrentTab.Text, e.Font, TextBrush, (RectangleF)ItemRect, sf);
//Reset any Graphics rotation
e.Graphics.ResetTransform();
//Finally, we should Dispose of our brushes.
FillBrush.Dispose();
TextBrush.Dispose();
}
I use something like this in mu TabControl derived class (and it will do gradients too):
protected override void OnDrawItem(DrawItemEventArgs e)
{
// fill in the whole rect
using (SolidBrush br = new SolidBrush(Theme.FormBackColor))
{
e.Graphics.FillRectangle(br, ClientRectangle);
}
// draw the tabs
for (int i = 0; i < TabPages.Count; ++i)
{
TabPage tab = TabPages[i];
// Get the text area of the current tab
RectangleF tabTextArea = (RectangleF)GetTabRect(i);
// determine how to draw the tab based on which type of tab it is
Color tabTopBackColor = GetTopBackColor();
Color tabBottomBackColor = GetBottomBackColor();
Color tabTextColor = GetTextColor();
// draw the background
using (LinearGradientBrush br = new LinearGradientBrush(tabTextArea, tabTopBackColor, tabBottomBackColor, LinearGradientMode.Vertical))
{
e.Graphics.FillRectangle(br, tabTextArea);
}
// draw the tab header text
using (SolidBrush brush = new SolidBrush(tabTextColor))
{
e.Graphics.DrawString(tab.Text, Font, brush, CreateTabHeaderTextRect(tabTextArea));
}
}
}
private RectangleF CreateTabHeaderTextRect(RectangleF tabTextArea)
{
tabTextArea.X += 3;
tabTextArea.Y += 1;
tabTextArea.Height -= 1;
return tabTextArea;
}
I've written a WPF UserControl, and want to add one or more of it to my Window at runtime when I click a button. How can I do that?
Edit: Further specification
I want to add the usercontrols to a Canvas, and put in a absolute position. The canvas is a drawing of the floors in my house, and each usercontrol has properties to indicate where in the house it is positioned. So I want all the controls to be positioned in the correct position on the canvas.
I'm thinking something like this
var light = new LightUserControl(2);
HouseCanvas.Children.Add(light); // this should be positioned in a specific place
After you add the your control to the Canvas you need to specify the top and left co-ordinates using the Canvas.Top and Canvas.Left attached properties as follows.
var light = new LightUserControl(2);
HouseCanvas.Children.Add(light);
Canvas.SetLeft(light, 20);
Canvas.SetTop(light, 20);
In case you want to add the control to a Grid instead of a Canvas you can specify all the Grid properties through the Grid static class as follows:
Label newLabel = new Label();
newLabel.Content = "The New Element";
Main.Children.Add(newLabel);
Grid.SetColumn(newLabel, 0);
Grid.SetRow(newLabel, 0);
Add a StackPanel to the window and on each button click,
_stackPanel.Children.Add(new YourControl());
You can do this in many ways.
My solution:
for (i = 1; i <= buttoncount; i++)
{
Button mybutton = new Button();
Grid1.Children.Add(mybutton);
mybutton.Height = 100;
mybutton.Width = 100;
mybutton.Name = "button" + i;
mybutton.Content = mybutton.Name;
}
public static void AddChild(this Visual parent, UIElement child)
{
if (InternalAddChild(parent, child))
{
return;
}
throw new NotSupportedException();
}
private static bool InternalAddChild(Visual parent, UIElement child)
{
Panel panel = parent as Panel;
if (panel != null)
{
panel.Children.Add(child);
return true;
}
for (int i = VisualTreeHelper.GetChildrenCount(parent) - 1; i != -1; i--)
{
Visual target = VisualTreeHelper.GetChild(parent, i) as Visual;
if (target != null && InternalAddChild(target, child))
{
return true;
}
}
return false;
}
Just complementing the answer:
for (i = 1; i <= buttoncount; i++)
{
Button mybutton = new Button();
Grid1.Children.Add(mybutton);
mybutton.Height = 100;
mybutton.Width = 100;
mybutton.Name = "button" + i;
mybutton.Content = mybutton.Name;
mybutton.Click += button_Click;
}
private void button_Click(object sender, RoutedEventArgs e)
{
// do something
}