autohidepanel.cs

Magic Library 1.7,有说明文档

                                rect.Width = (_slideRect.Width + barSize.Width) / 
                                            _slideSteps * (_slideStep + 1);
                            
                            // Want the right hand side of WCT showing
                            _currentWCT.Location = new Point(rect.Width - _currentWCT.Width - barSize.Width, 0);
                            break;
                        case DockStyle.Right:
                            int right = _currentPanel.Right;
                            
                            if (lastStep)
                                rect.Width = _slideRect.Width + barSize.Width;
                            else
                                rect.Width = (_slideRect.Width + barSize.Width) / 
                                            _slideSteps * (_slideStep + 1);
                                              
                            rect.X -= rect.Right - right;
                            
                            _currentWCT.Location = new Point(barSize.Width, 0);
                            break;
                        case DockStyle.Top:
                            if (lastStep)
                                rect.Height = _slideRect.Height + barSize.Height;
                            else
                                rect.Height = (_slideRect.Height + barSize.Height) / 
                                            _slideSteps * (_slideStep + 1);
                            
                            // Want the bottom of the WCT showing
                            _currentWCT.Location = new Point(0, rect.Height - _currentWCT.Height - barSize.Height);
                            break;
                        case DockStyle.Bottom:
                            int bottom = _currentPanel.Bottom;
                            
                            if (lastStep)
                                rect.Height = _slideRect.Height + barSize.Height;
                            else
                                rect.Height = (_slideRect.Height + barSize.Height) / 
                                            _slideSteps * (_slideStep + 1);
                                              
                            rect.Y -= rect.Bottom - bottom;

                            _currentWCT.Location = new Point(0, barSize.Height);
                            break;
                    }

                    // Have to use Win32 API call to alter the Panel size and position at the same time, no 
                    // Control method/property is available to do both at the same time. Otherwise you can see
                    // the Panel being moved in two steps which looks naff!
                    User32.MoveWindow(_currentPanel.Handle, rect.Left, rect.Top, rect.Width, rect.Height, true);
                    
                    // Stop timer when all required steps performed		    
                    if (lastStep)
                    {
                        StopSlideTimer();
                        
                        // If sliding into view from bottom
                        if (this.Dock == DockStyle.Top)
                        {
                            // Must cause repaint to prevent artifacts
                            _currentPanel.Refresh();
                        }
                    }
                }
                else
                {
                    int steps = _slideSteps - _slideStep;
                    
                    // Move Window another step towards required position
                    switch(this.Dock)
                    {
                        case DockStyle.Left:
                            if (lastStep)
                                rect.Width = 0;
                            else
                                rect.Width = (_slideRect.Width + barSize.Width) / 
                                            _slideSteps * steps;
                            break;
                        case DockStyle.Right:
                            int right = _currentPanel.Right;
                            
                            if (lastStep)
                                rect.Width = 0;
                            else
                                rect.Width = (_slideRect.Width + barSize.Width) / 
                                            _slideSteps * steps;
                                             
                            rect.X += right - rect.Right;
                            break;
                        case DockStyle.Top:
                            if (lastStep)
                                rect.Height = 0;
                            else
                                rect.Height = (_slideRect.Height + barSize.Height) / 
                                            _slideSteps * steps;
                            break;
                        case DockStyle.Bottom:
                            int bottom = _currentPanel.Bottom;
                            
                            if (lastStep)
                                rect.Height = 0;
                            else
                                rect.Height = (_slideRect.Height + barSize.Height) / 
                                            _slideSteps * steps;
                                              
                            rect.Y += bottom - rect.Bottom;
                            break;
                    }
                    
                    // Have to use Win32 API call to alter the Panel size and position at the same time, no 
                    // Control method/property is available to do both at the same time. Otherwise you can see
                    // the Panel being moved in two steps which looks naff!
                    User32.MoveWindow(_currentPanel.Handle, rect.Left, rect.Top, rect.Width, rect.Height, true);

                    // Stop timer when all required steps performed		    
                    if (lastStep)
                    {
                        StopSlideTimer();
                        
                        // No longer need to show it
                        RemoveDisplayedWindow();
                        
                        // No longer considered the shown window
                        _currentWCT = null;
                    }
                }
                
                // Increment the step value
                _slideStep++;
            }
        }

        protected void OnDismissTick(object sender, EventArgs e)
        {
            // Safety check that timer does not expire after our death
            if (this.IsDisposed || (_currentPanel == null) || _currentPanel.IsDisposed)
            {
                StopDismissTimer();
                return;
            }

            // Should any dismiss attempt from timer be ignored?
            if (!_ignoreDismiss)
            {
                // Are we currently showing a Window?
                if (_currentPanel != null)
                {
                    // Timer is being used to hide the Panel
                    _slideOut = false;
            
                    // Kick off the timer
                    StartSlideTimer();
                }
            }

            // Stop the dismiss timer from reoccuring
            StopDismissTimer();
        }
        
        protected void OnContainerResized(object sender, EventArgs e)
        {
            RemoveShowingWindow();
        }
        
        public void RemoveShowingWindow()
        {
            _ignoreDismiss = false;

            // Is focus leaving the entire WindowContentTabbed control?
            if (_currentWCT != null)
            {
                // Remember current focus
                IntPtr hWnd = User32.GetFocus();

                // Do not slide a window in the process of being removed
                StopDismissTimer();
                StopSlideTimer();
			
                // Remove Panel/WCT from display and stop timers
                RemoveDisplayedWindow();
                
                // No longer considered the shown window
                _currentWCT = null;

                // Replace the focus
                User32.SetFocus(hWnd);
            }	
            
            // Prevent drawing artifacts by invalidating window
            Invalidate();
        }

        protected void OnPanelEnter(object sender, EventArgs e)
        {
            _ignoreDismiss = true;
        }

        protected void OnPanelLeave(object sender, EventArgs e)
        {
            _ignoreDismiss = false;

            // Is focus leaving the entire WindowContentTabbed control?
            if (!_killing && (_currentWCT != null) && !_currentWCT.ContainsFocus)
            {
                // Remember current focus
                IntPtr hWnd = User32.GetFocus();
			
                // Do not slide a window in the process of being removed
                StopDismissTimer();
                StopSlideTimer();

                // Remove Panel/WCT from display and stop timers
                RemoveDisplayedWindow();
                
                // No longer considered the shown window
                _currentWCT = null;

                // Replace the focus
                User32.SetFocus(hWnd);
            }	
        }
 
        protected void MonitorPanel(bool add)
        {
            MonitorControl(_currentPanel, add);
        }

        protected void MonitorControl(Control c, bool add)
        {
            if (add)
            {
                // Monitor focus changes on the Control
                c.GotFocus += new EventHandler(OnPanelEnter);
                c.LostFocus += new EventHandler(OnPanelLeave);
            }
            else
            {
                // Unmonitor focus changes on the Control
                c.GotFocus -= new EventHandler(OnPanelEnter);
                c.LostFocus -= new EventHandler(OnPanelLeave);
            }

            foreach(Control child in c.Controls)
                MonitorControl(child, add);
        }
        
        protected override void OnPaintBackground(PaintEventArgs e)
        {
            Color backColor = base.BackColor;

            if (_manager.Style == VisualStyle.IDE)
            {
                if (_defaultColor)
                    backColor = ColorHelper.TabBackgroundFromBaseColor(SystemColors.Control);
                else
                    backColor = ColorHelper.TabBackgroundFromBaseColor(backColor);
            }
            else        
                if (_defaultColor)
                    backColor = SystemColors.Control;

            using(SolidBrush brush = new SolidBrush(backColor))
                e.Graphics.FillRectangle(brush, this.ClientRectangle);
        }
        
        public bool PreFilterMessage(ref Message msg)
        {
            Form parentForm = this.FindForm();

            // Only interested if the Form we are on contains the focus and we are showing a Panel
            if ((parentForm != null) && (parentForm == Form.ActiveForm) && 
                parentForm.ContainsFocus && (_currentPanel != null) && 
                !_currentPanel.IsDisposed)
            {		
                switch(msg.Msg)
                {
                    case (int)Win32.Msgs.WM_MOUSEMOVE:
                        Win32.POINT screenPos;
                        screenPos.x = (int)((uint)msg.LParam & 0x0000FFFFU);
                        screenPos.y = (int)(((uint)msg.LParam & 0xFFFF0000U) >> 16);

                        // Convert the mouse position to screen coordinates
                        User32.ClientToScreen(msg.HWnd, ref screenPos);

                        // Get the screen rectangle for the showing panel and this object
                        Rectangle panelRect = _currentPanel.RectangleToScreen(_currentPanel.ClientRectangle);
                        Rectangle thisRect = this.RectangleToScreen(this.ClientRectangle);

                        // Do we think the mouse is not over the tab or panel?
                        if (_dismissRunning)
                        {
                            // Is mouse moving over the panel?
                            if (panelRect.Contains(new Point(screenPos.x, screenPos.y)))
                            {
                                // Cancel timer
                                StopDismissTimer();
                           }
                        }
                        else
                        {
                            // If mouse not over the Panel or the ourself
                            if (!panelRect.Contains(new Point(screenPos.x, screenPos.y)) &&
                                !thisRect.Contains(new Point(screenPos.x, screenPos.y)))
                            {
                                // Simulate the mouse leaving ourself so that dismiss timer is started
                                OnPagesLeave(null);
                            }
                        }

                        break;
                }
            }

            return false;
		}
    }
}