void DragControl_QueryContinueDrag (object sender, QueryContinueDragEventArgs e)
{
- DragControl c = (DragControl)sender;
+ DragDropControl c = (DragDropControl)sender;
DNDForm f = (DNDForm)c.Parent;
if (f.DropControl.EnterFiredCount == 0)
return;
void DropControl_DragDrop (object sender, DragEventArgs e)
{
- DropControl c = (DropControl)sender;
+ DragDropControl c = (DragDropControl)sender;
c.ResetEventCounters ();
}
Assert.AreEqual (DragDropEffects.Move, form.DragControl.PerformedEffect, "A3");
}
+ [Test]
+ public void DropWithoutMovement ()
+ {
+ DNDForm form = new DNDForm ();
+ form.Text = MethodBase.GetCurrentMethod ().Name;
+ form.InstructionsText =
+ "Instructions:" + Environment.NewLine + Environment.NewLine +
+ "1. Click with left button on the control on the left, holding it, WITHOUT MOVING IT." + Environment.NewLine +
+ "2. Release the button." + Environment.NewLine +
+ "3. Close the form.";
+ form.DragControl.DragData = "no movement";
+ form.DragControl.AllowDrop = true;
+ form.DragControl.AllowedEffects = DragDropEffects.Move;
+ form.DragControl.DropEffect = DragDropEffects.Move;
+
+ // Force to automatically do a dnd operation when mouse is pressed,
+ // instead of waiting for movement
+ form.DragControl.MouseDown += new MouseEventHandler (DragControl_MouseDown);
+
+ Application.Run (form);
+
+ Assert.AreEqual (1, form.DragControl.EnterFiredCount, "A1");
+ Assert.AreEqual (0, form.DragControl.LeaveFiredCount, "A2");
+ Assert.AreEqual (1, form.DragControl.DropFiredCount, "A3");
+ Assert.AreEqual (0, form.DragControl.DragOverFiredCount, "A4");
+ Assert.AreEqual (true, form.DragControl.Data != null, "A5");
+ // The assertion below is weird: We had a successfully drop, but the returned value is None
+ Assert.AreEqual (DragDropEffects.None, form.DragControl.PerformedEffect, "A6");
+ }
+
+ void DragControl_MouseDown (object sender, MouseEventArgs e)
+ {
+ DragDropControl ctrl = (DragDropControl)sender;
+ ctrl.DoDragDrop (ctrl.DragData, ctrl.AllowedEffects);
+ }
+
[Test]
public void DragDropInSameControl ()
{
"2. Move the mouse inside left control. " + Environment.NewLine +
"3. Drop on left control (same)." + Environment.NewLine + Environment.NewLine +
"4. Click with left button on the control on the left again, holding it." + Environment.NewLine +
- "5. Press ESC, release mouse button and move mouse pointer outside control." + Environment.NewLine +
- "4. Close the form.";
+ "5. Move the mouse inside the left control. " + Environment.NewLine +
+ "6. Press ESC, release mouse button and move mouse pointer outside control." + Environment.NewLine +
+ "7. Close the form.";
form.DragControl.DragData = "SameControl";
form.DragControl.AllowDrop = true;
form.DragControl.AllowedEffects = DragDropEffects.Copy;
public class DNDForm : Form
{
- DragControl drag_control;
- DropControl drop_control;
+ DragDropControl drag_control;
+ DragDropControl drop_control;
TextBox instructions_tb;
Label test_name;
instructions_tb.Location = new Point (5, test_name.Bottom + 5);
instructions_tb.Size = new Size (460, 180);
- drag_control = new DragControl ();
+ drag_control = new DragDropControl ();
drag_control.Location = new Point (5, instructions_tb.Bottom + 10);
drag_control.Size = new Size (220, 180);
+ drag_control.BackColor = Color.LightYellow;
+ drag_control.DragDropColor = Color.Yellow;
+ drag_control.Text = "Drag Control";
+ drag_control.DoDrag = true;
- drop_control = new DropControl ();
+ drop_control = new DragDropControl ();
drop_control.Location = new Point (drag_control.Right + 20, instructions_tb.Bottom + 10);
drop_control.Size = new Size (220, 180);
+ drop_control.BackColor = Color.LightGreen;
+ drop_control.DragDropColor = Color.Green;
+ drop_control.Text = "Drop Control";
+ drop_control.AllowDrop = true;
Controls.AddRange (new Control [] { test_name, instructions_tb, drag_control, drop_control });
}
}
- public DragControl DragControl {
+ public DragDropControl DragControl {
get {
return drag_control;
}
}
- public DropControl DropControl {
+ public DragDropControl DropControl {
get {
return drop_control;
}
}
}
- public class DragControl : Control
+ public class DragDropControl : Control
{
- Rectangle drag_rect;
- object drag_data;
+ DragDropEffects effect;
DragDropEffects allowed_effects;
DragDropEffects performed_effect;
- Color drag_color;
+ object drag_data;
+ IDataObject data;
+ Color drop_color;
+ Color prev_color;
+ Rectangle drag_rect;
+ bool do_drag;
+
+ int drop_fired_count;
+ int leave_fired_count;
+ int drag_over_fired_count;
+ int enter_fired_count;
- public DragControl ()
+ public DragDropControl ()
{
drag_rect = new Rectangle (new Point (-1, -1), SystemInformation.DragSize);
- BackColor = Color.LightYellow;
- drag_color = Color.Yellow;
}
- public object DragData
- {
+ // to call or not DoDragDrop when mouse movement is detected. Only handle dnd events otherwise.
+ public bool DoDrag {
+ get {
+ return do_drag;
+ }
+ set {
+ do_drag = value;
+ }
+ }
+
+ // Color of the control when an operation is having place
+ public Color DragDropColor {
+ get {
+ return drop_color;
+ }
+ set {
+ drop_color = value;
+ }
+ }
+
+ // Data to pass to Control.DoDragDrop
+ public object DragData {
get {
return drag_data;
}
}
}
+ // Effects passed to Control.DoDragDrop
public DragDropEffects AllowedEffects {
get {
return allowed_effects;
}
}
+ // Effect returned by Control.DoDragDrop
public DragDropEffects PerformedEffect {
get {
return performed_effect;
}
}
- protected override void OnMouseMove (MouseEventArgs e)
- {
- base.OnMouseMove (e);
-
- if (e.Button == MouseButtons.Left || e.Button == MouseButtons.Right) {
-
- if (drag_rect.X == -1 && drag_rect.Y == -1)
- drag_rect.Location = new Point (e.X, e.Y);
- else {
- if (!drag_rect.Contains (new Point (e.X, e.Y))) {
- Color prev_color = BackColor;
- BackColor = drag_color;
-
- performed_effect = DoDragDrop (drag_data, allowed_effects);
-
- drag_rect.Location = new Point (-1, -1);
- BackColor = prev_color;
- }
- }
-
- }
- }
-
- protected override void OnQueryContinueDrag (QueryContinueDragEventArgs qcdevent)
- {
- base.OnQueryContinueDrag (qcdevent);
- }
-
- protected override void OnPaint (PaintEventArgs e)
- {
- base.OnPaint (e);
-
- Graphics g = e.Graphics;
-
- StringFormat sf = new StringFormat ();
- sf.Alignment = StringAlignment.Center;
- sf.LineAlignment = StringAlignment.Center;
-
- g.DrawString ("DragControl", SystemFonts.DefaultFont, SystemBrushes.ControlDark,
- ClientRectangle, sf);
-
- sf.Dispose ();
- }
- }
-
- public class DropControl : Control
- {
- DragDropEffects effect;
- IDataObject data;
- Color drop_color;
- Color prev_color;
-
- int drop_fired_count;
- int leave_fired_count;
- int drag_over_fired_count;
- int enter_fired_count;
-
- public DropControl ()
- {
- AllowDrop = true;
- BackColor = Color.LightGreen;
- drop_color = Color.Green;
- }
-
+ // The value DragEventArgs.Effect gets in DragEnter event
public DragDropEffects DropEffect {
get {
return effect;
}
}
+ // The value in DragEventArgs.Data
public IDataObject Data {
get {
return data;
protected override void OnDragEnter (DragEventArgs drgevent)
{
- prev_color = BackColor;
- BackColor = drop_color;
- enter_fired_count++;
+ if (!do_drag) {
+ prev_color = BackColor;
+ BackColor = drop_color;
+ }
+ enter_fired_count++;
drgevent.Effect = effect;
base.OnDragEnter (drgevent);
protected override void OnDragOver (DragEventArgs drgevent)
{
+ drag_over_fired_count++;
+
base.OnDragOver (drgevent);
}
protected override void OnDragLeave (EventArgs e)
{
data = null;
- BackColor = prev_color;
leave_fired_count++;
+ if (!do_drag)
+ BackColor = prev_color;
+
base.OnDragLeave (e);
}
protected override void OnDragDrop (DragEventArgs drgevent)
{
data = drgevent.Data;
- BackColor = prev_color;
drop_fired_count++;
+ if (!do_drag)
+ BackColor = prev_color;
+
base.OnDragDrop (drgevent);
}
+ protected override void OnMouseMove (MouseEventArgs e)
+ {
+ base.OnMouseMove (e);
+
+ if (!do_drag)
+ return;
+
+ if (e.Button == MouseButtons.Left || e.Button == MouseButtons.Right) {
+
+ if (drag_rect.X == -1 && drag_rect.Y == -1)
+ drag_rect.Location = new Point (e.X, e.Y);
+ else {
+ if (!drag_rect.Contains (new Point (e.X, e.Y))) {
+ Color prev_color = BackColor;
+ BackColor = drop_color;
+
+ performed_effect = DoDragDrop (drag_data, allowed_effects);
+
+ drag_rect.Location = new Point (-1, -1);
+ BackColor = prev_color;
+ }
+ }
+
+ }
+ }
+
protected override void OnPaint (PaintEventArgs e)
{
base.OnPaint (e);
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
- g.DrawString ("DropControl", SystemFonts.DefaultFont, SystemBrushes.ControlDark,
+ g.DrawString (Text, SystemFonts.DefaultFont, SystemBrushes.ControlDark,
ClientRectangle, sf);
sf.Dispose ();
projects / mono.git / commitdiff