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annotate mde/gui/widget/Ifaces.d @ 37:052df9b2fe07

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Allowed widget resizing, changed widget IDs and made Input catch any callback exceptions. Enabled widget resizing. Removed IRenderer's temporary drawBox method and added drawButton for ButtonWidget. Made the Widget class abstract and added FixedWidget and SizableWidget classes. Rewrote much of createWidget to use meta-code; changed widget IDs. Made Input catch callback exceptions and report error messages. committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Mon, 05 May 2008 14:47:25 +0100
parents 57d000574d75
children 5132301e9ed7
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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4
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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15
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16 /** Window and widget interfaces. */
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17 module mde.gui.widget.Ifaces;
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18
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19 public import mde.gui.renderer.IRenderer;
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20 import mde.gui.IGui;
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21
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22 /** Interface for Window, allowing widgets to call some of Window's methods.
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23 *
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24 * Contains the methods in Window available for widgets to call on their root. */
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25 interface IWindow : IWidget
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26 {
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27 /** Widget ID type. Each ID is unique under this window.
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28 *
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29 * Type is int since this is the widget data type. */
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30 alias int widgetID;
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31
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32 /** Get a widget by ID.
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33 *
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34 * Returns the widget with the given ID from the Window's widget list. If the widget hasn't yet
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35 * been created, creates it using the Window's widget creation data.
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36 *
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37 * Widgets should never be used more than once (must have a unique parent and position!), and
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38 * this function is only intended for widgets to get child-widgets, hence a warning is logged
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39 * if a widget is asked for more than once. */
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40 //NOTE: possibly revise: parent isn't actually used any more
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41 IWidget makeWidget (widgetID i, IWidget parent);
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42
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43 /** Get the managing Gui. */
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44 IGui gui ();
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45
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46 /** Get the window's renderer.
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47 *
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48 * Normally specific to the GUI, but widgets have no direct contact with the GUI and this
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49 * provides the possibility of per-window renderers (if desired). */
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50 IRenderer renderer ();
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51 }
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52
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53 /** Interface for widgets.
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54 *
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55 * Note that Window also implements this interface so that widgets can interact with their parent in
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56 * a uniform way.
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57 *
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58 * A widget is a region of a GUI window which handles rendering and user-interaction for itself
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59 * and is able to communicate with it's window and parent/child widgets as necessary.
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60 *
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61 * A widget's constructor should have this prototype:
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62 * ----------------------------------
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63 * this (IWindow window, IWidget parent, int[] data);
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64 * ----------------------------------
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65 * Where window is the root window (the window to which the widget belongs), parent is the parent
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66 * widget, and data is an array of initialisation data. The method should throw a
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67 * WidgetDataException (created without parameters) if the data has wrong length or is otherwise
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68 * invalid.
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69 *
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70 * The widget's size should be set either by it's this() method or by the first call to
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71 * setSize(). setSize() is called on all widgets immediately after their creation, and throwing an
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72 * exception at this point (but not on later calls to setSize) is an acceptible method of failure.
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73 */
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74 //NOTE: add another this() without the data for default initialization, for the GUI editor?
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75 interface IWidget
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76 {
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77 /** is the width / height resizable?
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78 *
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79 * If not, the widget has fixed dimensions equal the output of getMinimalSize. */
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80 bool isWSizable ();
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81 bool isHSizable (); /// ditto
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82
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83 /** Calculate the minimal size the widget could be shrunk to, taking into account
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84 * child-widgets. */
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85 void getMinimalSize (out int w, out int h);
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86
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87 /** Get the current size of the widget. */
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88 void getCurrentSize (out int w, out int h);
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89
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90 /** Used to adjust the size.
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91 *
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92 * The size should be clamped to the widget's minimal size, i.e. the size set may be larger
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93 * than that given by the parameters. Conversely, the size should not be reduced to the
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94 * widget's maximal size (if any) but expanded as necessary (alignment to be implemented).
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95 *
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96 * If the actual size is needed, call getCurrentSize afterwards. */
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97 void setSize (int w, int h);
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98
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99 /** Set the current position (i.e. called on init and move). */
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100 void setPosition (int x, int y);
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101
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102
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103 /** Recursively scan the widget tree to find the widget under (x,y).
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104 *
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105 * If called on a widget, that widget should assume the location is over itself, and so should
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106 * either return itself or the result of calling getWidget on the appropriate child widget.
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107 *
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108 * In the case of Window this may not be the case; it should check and return null if not under
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109 * (x,y).
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110 *
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111 * Note: use global coordinates (x,y) not coordinates relative to the widget. */
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112 IWidget getWidget (int x, int y);
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113
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114 /** Receive a mouse click event.
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115 *
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116 * See mde.input.input.Input.MouseClickCallback for parameters. However, cx and cy are adjusted
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117 * to the Widget's local coordinates.
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118 *
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119 * Widget may assume coordinates are on the widget (caller must check). */
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120 void clickEvent (ushort cx, ushort cy, ubyte b, bool state);
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121
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122
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123 /** Draw, using the stored values of x and y.
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124 *
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125 * Maybe later enforce clipping of all sub-widget drawing, particularly for cases where only
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 32
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126 * part of the widget is visible: scroll bars or a hidden window. */
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127 void draw ();
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128 }