67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
#include "xpcDrawing.h"
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#include "XPLMDisplay.h"
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#include "XPLMGraphics.h"
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#include <stdlib.h>
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#include <string.h>
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//Internal Memory
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static bool msgEnabled = false;
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static int msgX = -1;
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static int msgY = -1;
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static char msgVal[256] = { 0 };
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static size_t newLineCount = 0;
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static size_t newLines[64] = { 0 };
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static float rgb[3] = { 0.25F, 1.0F, 0.25F };
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//Internal Functions
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static int MessageDrawCallback(XPLMDrawingPhase inPhase, int inIsBefore, void * inRefcon)
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{
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XPLMDrawString(rgb, msgX, msgY, msgVal, NULL, xplmFont_Basic);
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int y = msgY - 16;
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for (size_t i = 0; i < newLineCount; ++i)
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{
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XPLMDrawString(rgb, msgX, y, msgVal + newLines[i], NULL, xplmFont_Basic);
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y -= 16;
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}
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return 1;
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}
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//Public Functions
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void XPCClearMessage()
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{
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XPLMUnregisterDrawCallback(MessageDrawCallback, xplm_Phase_Window, 0, NULL);
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msgEnabled = false;
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}
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void XPCSetMessage(int x, int y, char* msg)
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{
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//Determine size of message and clear instead if the message string
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//is empty.
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size_t len = strnlen(msg, 255);
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if (len == 0)
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{
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XPCClearMessage();
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return;
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}
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//Set the message, location, and mark new lines.
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strncpy(msgVal, msg, len);
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newLineCount = 0;
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for (size_t i = 0; i < len && newLineCount < 64; ++i)
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{
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if (msgVal[i] == '\n' || msgVal[i] == '\r')
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{
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msgVal[i] = 0;
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newLines[newLineCount++] = i + 1;
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}
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}
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msgX = x < 0 ? 10 : x;
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msgY = y < 0 ? 600 : y;
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//Enable drawing if necessary
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if (!msgEnabled)
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{
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XPLMRegisterDrawCallback(MessageDrawCallback, xplm_Phase_LastCockpit, 0, NULL);
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msgEnabled = true;
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}
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} |