mirror of
https://github.com/dgis/xsddiagram.git
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256 lines
9.5 KiB
C#
256 lines
9.5 KiB
C#
// XSDDiagram - A XML Schema Definition file viewer
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// Copyright (C) 2006-2011 Regis COSNIER
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Drawing;
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using System.Windows.Forms;
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namespace XSDDiagram
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{
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class DiagramControlContainer : UserControl
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{
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private DiagramControl diagramControl;
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private VScrollBar vScrollBar;
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private HScrollBar hScrollBar;
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private Point virtualPoint = new Point(0, 0);
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private Size virtualSize = new Size(10, 10);
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private bool isDragging = false;
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private Point mouseDownPosition = new Point(0, 0);
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private int mouseDownHScroll = 0;
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private int mouseDownVScroll = 0;
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public DiagramControl DiagramControl { get { return this.diagramControl; } }
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public Point VirtualPoint
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{
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get { return this.virtualPoint; }
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set { this.virtualPoint = value; }
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}
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public Size VirtualSize
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{
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get { return this.virtualSize; }
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set { this.virtualSize = value; diagramControl_Resize(null, null); }
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}
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public DiagramControlContainer()
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{
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InitializeComponent();
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this.diagramControl.MouseWheel += new MouseEventHandler(diagramControl_MouseWheel);
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}
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private void InitializeComponent()
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{
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this.vScrollBar = new System.Windows.Forms.VScrollBar();
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this.hScrollBar = new System.Windows.Forms.HScrollBar();
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this.diagramControl = new XSDDiagram.DiagramControl();
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this.SuspendLayout();
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//
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// vScrollBar
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//
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this.vScrollBar.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.vScrollBar.Location = new System.Drawing.Point(437, 0);
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this.vScrollBar.Name = "vScrollBar";
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this.vScrollBar.Size = new System.Drawing.Size(17, 348);
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this.vScrollBar.SmallChange = 5;
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this.vScrollBar.TabIndex = 0;
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this.vScrollBar.ValueChanged += new System.EventHandler(this.vScrollBar_ValueChanged);
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//
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// hScrollBar
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//
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this.hScrollBar.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.hScrollBar.Location = new System.Drawing.Point(0, 348);
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this.hScrollBar.Name = "hScrollBar";
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this.hScrollBar.Size = new System.Drawing.Size(437, 17);
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this.hScrollBar.SmallChange = 5;
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this.hScrollBar.TabIndex = 1;
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this.hScrollBar.ValueChanged += new System.EventHandler(this.vScrollBar_ValueChanged);
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//
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// diagramControl
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//
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this.diagramControl.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
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| System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.diagramControl.Location = new System.Drawing.Point(0, 0);
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this.diagramControl.Margin = new System.Windows.Forms.Padding(0);
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this.diagramControl.Name = "diagramControl";
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this.diagramControl.Size = new System.Drawing.Size(437, 348);
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this.diagramControl.TabIndex = 2;
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this.diagramControl.MouseDown += new System.Windows.Forms.MouseEventHandler(this.diagramControl_MouseDown);
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this.diagramControl.MouseMove += new System.Windows.Forms.MouseEventHandler(this.diagramControl_MouseMove);
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this.diagramControl.Resize += new System.EventHandler(this.diagramControl_Resize);
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this.diagramControl.MouseUp += new System.Windows.Forms.MouseEventHandler(this.diagramControl_MouseUp);
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//
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// DiagramControlContainer
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//
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this.Controls.Add(this.diagramControl);
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this.Controls.Add(this.hScrollBar);
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this.Controls.Add(this.vScrollBar);
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this.Name = "DiagramControlContainer";
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this.Size = new System.Drawing.Size(454, 365);
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this.ResumeLayout(false);
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}
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void diagramControl_MouseWheel(object sender, MouseEventArgs e)
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{
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if ((ModifierKeys & Keys.Control) != Keys.Control)
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{
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int scrollBarValue = this.vScrollBar.Value;
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scrollBarValue -= e.Delta;
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if (scrollBarValue > this.vScrollBar.Maximum - this.vScrollBar.LargeChange)
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scrollBarValue = this.vScrollBar.Maximum - this.vScrollBar.LargeChange;
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if (scrollBarValue < this.vScrollBar.Minimum)
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scrollBarValue = this.vScrollBar.Minimum;
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this.vScrollBar.Value = scrollBarValue;
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}
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}
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private void diagramControl_Resize(object sender, EventArgs e)
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{
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LayoutScrollBars();
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}
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public void Clear()
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{
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this.hScrollBar.Value = 0;
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this.vScrollBar.Value = 0;
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LayoutScrollBars();
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}
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public void LayoutScrollBars()
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{
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this.SuspendLayout();
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Size diagramControlNewSize = this.ClientSize;
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if (this.virtualSize.Width > this.diagramControl.ClientSize.Width)
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{
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this.hScrollBar.Minimum = 0;
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this.hScrollBar.Maximum = this.virtualSize.Width;
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this.hScrollBar.LargeChange = this.diagramControl.ClientSize.Width;
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diagramControlNewSize.Height -= this.hScrollBar.Height;
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}
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else
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{
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this.hScrollBar.Minimum = 0;
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this.hScrollBar.Maximum = 0;
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}
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if (this.virtualSize.Height > this.diagramControl.ClientSize.Height)
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{
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this.vScrollBar.Minimum = 0;
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this.vScrollBar.Maximum = this.virtualSize.Height;
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this.vScrollBar.LargeChange = this.diagramControl.ClientSize.Height;
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diagramControlNewSize.Width -= this.vScrollBar.Width;
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}
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else
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{
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this.vScrollBar.Minimum = 0;
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this.vScrollBar.Maximum = 0;
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}
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// Fix the Bottom right corner of the scrollbar area.
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// Seems to be an issue with Mono on Linux!!!
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if (!Options.IsRunningOnMono)
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{
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Size hScrollBarSize = this.hScrollBar.Size;
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if (this.hScrollBar.Maximum > 0 && this.vScrollBar.Maximum == 0)
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hScrollBarSize.Width = this.ClientSize.Width;
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else
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hScrollBarSize.Width = this.ClientSize.Width - this.vScrollBar.Width;
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this.hScrollBar.Size = hScrollBarSize;
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Size vScrollBarSize = this.vScrollBar.Size;
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if (this.vScrollBar.Maximum > 0 && this.hScrollBar.Maximum == 0)
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vScrollBarSize.Height = this.ClientSize.Height;
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else
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vScrollBarSize.Height = this.ClientSize.Height - this.hScrollBar.Height;
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this.vScrollBar.Size = vScrollBarSize;
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}
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this.diagramControl.Size = diagramControlNewSize;
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this.diagramControl.Invalidate(this.diagramControl.ClientRectangle);
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this.ResumeLayout();
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}
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public void ScrollTo(Point point)
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{
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ScrollTo(point, false);
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}
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public void ScrollTo(Point point, bool center)
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{
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if (center)
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{
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point.X -= this.DiagramControl.ClientRectangle.Width / 2;
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point.Y -= this.DiagramControl.ClientRectangle.Height / 2;
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}
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if (point.X > this.hScrollBar.Maximum - this.hScrollBar.LargeChange)
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point.X = this.hScrollBar.Maximum - this.hScrollBar.LargeChange;
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if (point.X < this.hScrollBar.Minimum)
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point.X = this.hScrollBar.Minimum;
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if (point.Y > this.vScrollBar.Maximum - this.vScrollBar.LargeChange)
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point.Y = this.vScrollBar.Maximum - this.vScrollBar.LargeChange;
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if (point.Y < this.vScrollBar.Minimum)
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point.Y = this.vScrollBar.Minimum;
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this.hScrollBar.Value = point.X;
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this.vScrollBar.Value = point.Y;
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}
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private void vScrollBar_ValueChanged(object sender, EventArgs e)
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{
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this.virtualPoint = new Point(this.hScrollBar.Value, this.vScrollBar.Value);
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//System.Diagnostics.Trace.WriteLine("h: " + this.hScrollBar.Value + " (min: " + this.hScrollBar.Minimum + ", max: " + this.hScrollBar.Maximum + "), v: " + this.vScrollBar.Value + " (min: " + this.vScrollBar.Minimum + ", max: " + this.vScrollBar.Maximum + ")");
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this.diagramControl.Invalidate(this.diagramControl.ClientRectangle);
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}
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private void diagramControl_MouseMove(object sender, MouseEventArgs e)
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{
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if (this.isDragging)
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{
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int hValue = this.mouseDownHScroll + (this.mouseDownPosition.X - Cursor.Position.X);
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if (hValue > this.hScrollBar.Minimum && hValue < this.hScrollBar.Maximum - this.hScrollBar.LargeChange)
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this.hScrollBar.Value = hValue;
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int vValue = this.mouseDownVScroll + (this.mouseDownPosition.Y - Cursor.Position.Y);
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if (vValue > this.vScrollBar.Minimum && vValue < this.vScrollBar.Maximum - this.vScrollBar.LargeChange)
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this.vScrollBar.Value = vValue;
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}
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}
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private void diagramControl_MouseDown(object sender, MouseEventArgs e)
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{
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if (!this.isDragging)
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{
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this.mouseDownPosition = Cursor.Position;
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this.mouseDownHScroll = this.hScrollBar.Value;
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this.mouseDownVScroll = this.vScrollBar.Value;
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this.isDragging = true;
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}
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}
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private void diagramControl_MouseUp(object sender, MouseEventArgs e)
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{
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this.isDragging = false;
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}
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}
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}
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