Design Pattern Examples
Overview of object-oriented design patterns
HandlerChain_Message.h
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1
6
7#pragma once
8#ifndef __HANDLERCHAIN_MESSAGE_H__
9#define __HANDLERCHAIN_MESSAGE_H__
10
11#include "helpers/dynamicstring.h"
12
16typedef enum
17{
23 Close = 0,
24
28 ButtonDown = 1,
29
33 ButtonUp = 2,
34
39 Destroy = 3,
40
41} MessageType;
42
43
44//========================================================================
45//========================================================================
46//========================================================================
47
48
54typedef struct
55{
59 int X;
60
64 int Y;
65} MessagePosition;
66
67
78bool MessagePosition_ToString(MessagePosition* position, DynamicString* output);
79
80
81//========================================================================
82//========================================================================
83//========================================================================
84
85
90typedef struct
91{
95 MessageType MessageType;
96
102 MessagePosition Position;
103} Message;
104
105
114void Message_Initialize(Message* message, MessageType type, int x, int y);
115
125bool Message_ToString(Message* message, DynamicString* output);
126
127#endif // __HANDLERCHAIN_MESSAGE_H__
128
Message_ToString
bool Message_ToString(Message *message, DynamicString *output)
Convert a Message object to a string representation.
Definition: HandlerChain_Message.c:64
Message_Initialize
void Message_Initialize(Message *message, MessageType type, int x, int y)
Initialize a Message structure.
Definition: HandlerChain_Message.c:51
MessageType
MessageType
Type of message handled by MessageWindow.
Definition: HandlerChain_Message.h:17
ButtonUp
@ ButtonUp
Take an action on the currently selected window.
Definition: HandlerChain_Message.h:33
ButtonDown
@ ButtonDown
Selects a window based on position.
Definition: HandlerChain_Message.h:28
Destroy
@ Destroy
Window is being told to destroy itself. This is sent in response to seeing the Close message.
Definition: HandlerChain_Message.h:39
Close
@ Close
Window is asked to close itself, generally sent by the window itself in response to a button up in a ...
Definition: HandlerChain_Message.h:23
MessagePosition_ToString
bool MessagePosition_ToString(MessagePosition *position, DynamicString *output)
Convert a MessagePosition object to a string representation.
Definition: HandlerChain_Message.c:17
dynamicstring.h
Declaration of the DynamicString structure and supporting functions to work with dynamic strings.
DynamicString
Represents a string that can be grown dynamically.
Definition: dynamicstring.h:16
Message
Represents a message sent to the windows. A message contains a type and a position.
Definition: HandlerChain_Message.h:91
Message::Position
MessagePosition Position
Position of message when the message was sent. In a real system, this would generally represent the p...
Definition: HandlerChain_Message.h:102
Message::MessageType
MessageType MessageType
Value from the MessageType enumeration indicating the type of this message.
Definition: HandlerChain_Message.h:95
MessagePosition
Position of the message in global coordinates (same scope of coordinates as windows)....
Definition: HandlerChain_Message.h:55