/usr/share/gtk-sharp3-examples/ScribbleXInput.cs is in gtk-sharp3-examples 2.99.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | // ScribbleXInput.cs - port of Gtk+ scribble demo
//
// Author: Manuel V. Santos <mvsl@telefonica.net>
//
// (c) 2002 Rachel Hestilow
// (c) 2004 Manuel V. Santos
namespace GtkSamples {
using Gtk;
using Gdk;
using System;
public class ScribbleXInput {
private static Gtk.Window win;
private static Gtk.VBox vBox;
private static Gtk.Button inputButton;
private static Gtk.Button quitButton;
private static Gtk.DrawingArea darea;
private static Gdk.Pixmap pixmap = null;
private static Gtk.InputDialog inputDialog = null;
public static int Main (string[] args) {
Application.Init ();
win = new Gtk.Window ("Scribble XInput Demo");
win.DeleteEvent += new DeleteEventHandler (WindowDelete);
vBox = new VBox (false, 0);
win.Add (vBox);
darea = new Gtk.DrawingArea ();
darea.SetSizeRequest (200, 200);
darea.ExtensionEvents=ExtensionMode.Cursor;
vBox.PackStart (darea, true, true, 0);
darea.ExposeEvent += new ExposeEventHandler (ExposeEvent);
darea.ConfigureEvent += new ConfigureEventHandler (ConfigureEvent);
darea.MotionNotifyEvent += new MotionNotifyEventHandler (MotionNotifyEvent);
darea.ButtonPressEvent += new ButtonPressEventHandler (ButtonPressEvent);
darea.Events = EventMask.ExposureMask | EventMask.LeaveNotifyMask |
EventMask.ButtonPressMask | EventMask.PointerMotionMask;
inputButton = new Button("Input Dialog");
vBox.PackStart (inputButton, false, false, 0);
inputButton.Clicked += new EventHandler (InputButtonClicked);
quitButton = new Button("Quit");
vBox.PackStart (quitButton, false, false, 0);
quitButton.Clicked += new EventHandler (QuitButtonClicked);
win.ShowAll ();
Application.Run ();
return 0;
}
static void InputButtonClicked (object obj, EventArgs args) {
if (inputDialog == null) {
inputDialog = new InputDialog ();
inputDialog.SaveButton.Hide ();
inputDialog.CloseButton.Clicked += new EventHandler(InputDialogClose);
inputDialog.DeleteEvent += new DeleteEventHandler(InputDialogDelete);
}
inputDialog.Present ();
}
static void QuitButtonClicked (object obj, EventArgs args) {
Application.Quit ();
}
static void WindowDelete (object obj, DeleteEventArgs args) {
Application.Quit ();
args.RetVal = true;
}
static void InputDialogClose (object obj, EventArgs args) {
inputDialog.Hide ();
}
static void InputDialogDelete (object obj, DeleteEventArgs args) {
inputDialog.Hide ();
args.RetVal = true;
}
static void ExposeEvent (object obj, ExposeEventArgs args) {
Gdk.Rectangle area = args.Event.Area;
args.Event.Window.DrawDrawable (darea.Style.ForegroundGC(darea.State),
pixmap,
area.X, area.Y,
area.X, area.Y,
area.Width, area.Height);
args.RetVal = false;
}
static void ConfigureEvent (object obj, ConfigureEventArgs args) {
Gdk.EventConfigure ev = args.Event;
Gdk.Window window = ev.Window;
Gdk.Rectangle allocation = darea.Allocation;
pixmap = new Gdk.Pixmap (window, allocation.Width, allocation.Height, -1);
pixmap.DrawRectangle (darea.Style.WhiteGC, true, 0, 0,
allocation.Width, allocation.Height);
args.RetVal = true;
}
static void DrawBrush (Widget widget, InputSource source,
double x, double y, double pressure) {
Gdk.GC gc;
switch (source) {
case InputSource.Mouse:
gc = widget.Style.BlackGC;
break;
case InputSource.Pen:
gc = widget.Style.BlackGC;
break;
case InputSource.Eraser:
gc = widget.Style.WhiteGC;
break;
default:
gc = widget.Style.BlackGC;
break;
}
Gdk.Rectangle update_rect = new Gdk.Rectangle ();
update_rect.X = (int) (x - 10.0d * pressure);
update_rect.Y = (int) (y - 10.0d * pressure);
update_rect.Width = (int) (20.0d * pressure);
update_rect.Height = (int) (20.0d * pressure);
pixmap.DrawRectangle (gc, true,
update_rect.X, update_rect.Y,
update_rect.Width, update_rect.Height);
darea.QueueDrawArea (update_rect.X, update_rect.Y,
update_rect.Width, update_rect.Height);
}
static void ButtonPressEvent (object obj, ButtonPressEventArgs args) {
Gdk.EventButton ev = args.Event;
if (ev.Button == 1 && pixmap != null) {
double pressure;
ev.Device.GetAxis (ev.Axes, AxisUse.Pressure, out pressure);
DrawBrush ((Widget) obj, ev.Device.Source, ev.X, ev.Y, pressure);
}
args.RetVal = true;
}
static void MotionNotifyEvent (object obj, MotionNotifyEventArgs args) {
Gdk.EventMotion ev = args.Event;
Widget widget = (Widget) obj;
if ((ev.State & Gdk.ModifierType.Button1Mask) != 0 && pixmap != null) {
double pressure;
if (!ev.Device.GetAxis (ev.Axes, AxisUse.Pressure, out pressure)) {
pressure = 0.5;
}
DrawBrush (widget, ev.Device.Source, ev.X, ev.Y, pressure);
}
args.RetVal = true;
}
}
}
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