DialogTemplate.h

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#include "stdafx.h"
#include <Windows.h>
 
 
class DialogTemplate {
public:
    DialogTemplate(LPCTSTR caption, DWORD style, int x, int y, int w, int h, LPCTSTR font = NULL, WORD fontSize = 8) {
        usedBufferLength = sizeof(DLGTEMPLATE);
        totalBufferLength = usedBufferLength;
 
        dialogTemplate = (DLGTEMPLATE*)malloc(totalBufferLength);
 
        dialogTemplate->style = style;
 
        if (font != NULL) {
            dialogTemplate->style |= DS_SETFONT;
        }
 
        dialogTemplate->x = x;
        dialogTemplate->y = y;
        dialogTemplate->cx = w;
        dialogTemplate->cy = h;
        dialogTemplate->cdit = 0;
 
        dialogTemplate->dwExtendedStyle = 0;
 
        // The dialog box doesn't have a menu or a special class
        AppendData(_T("\0"), 2);
        AppendData(_T("\0"), 2);
 
        // Add the dialog's caption to the template
        AppendString(caption);
 
        if (font != NULL) {
            AppendData(&fontSize, sizeof(WORD));
            AppendString(font);
        }
    }
 
    void AddComponent(LPCTSTR type, LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        DLGITEMTEMPLATE item;
        item.style = style;
        item.x = x;
        item.y = y;
        item.cx = w;
        item.cy = h;
        item.id = id;
 
        item.dwExtendedStyle = exStyle;
 
        AppendData(&item, sizeof(DLGITEMTEMPLATE));
 
        AppendString(type);
        AppendString(caption);
 
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
 
        // Increment the component count
        dialogTemplate->cdit++;
    }
 
    void AddButton(LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        AddStandardComponent(0x0080, caption, style, exStyle, x, y, w, h, id);
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
    }
 
    void AddEditBox(LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        AddStandardComponent(0x0081, caption, style, exStyle, x, y, w, h, id);
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
    }
 
    void AddStatic(LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        AddStandardComponent(0x0082, caption, style, exStyle, x, y, w, h, id);
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
    }
 
    void AddListBox(LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        AddStandardComponent(0x0083, caption, style, exStyle, x, y, w, h, id);
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
    }
 
    void AddScrollBar(LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        AddStandardComponent(0x0084, caption, style, exStyle, x, y, w, h, id);
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
    }
 
    void AddComboBox(LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        AddStandardComponent(0x0085, caption, style, exStyle, x, y, w, h, id);
        WORD creationDataLength = 0;
        AppendData(&creationDataLength, sizeof(WORD));
    }
 
    /**
    * Returns a pointer to the Win32 dialog template which the object
    * represents. This pointer may become invalid if additional
    * components are added to the template.
    */
 
    operator const DLGTEMPLATE*() const {
        return dialogTemplate;
    }
 
    virtual ~DialogTemplate() {
        free(dialogTemplate);
    }
 
protected:
    void AddStandardComponent(WORD type, LPCTSTR caption, DWORD style, DWORD exStyle, int x, int y, int w, int h, WORD id) {
        DLGITEMTEMPLATE item;
 
        // DWORD algin the beginning of the component data
        AlignData(sizeof(DWORD));
 
        item.style = style;
        item.x = x;
        item.y = y;
        item.cx = w;
        item.cy = h;
        item.id = id;
 
        item.dwExtendedStyle = exStyle;
 
        AppendData(&item, sizeof(DLGITEMTEMPLATE));
 
        WORD preType = 0xFFFF;
 
        AppendData(&preType, sizeof(WORD));
        AppendData(&type, sizeof(WORD));
 
        AppendString(caption);
 
        // Increment the component count
        dialogTemplate->cdit++;
    }
 
    void AlignData(int size) {
        int paddingSize = usedBufferLength % size;
        if (paddingSize != 0) {
            EnsureSpace(paddingSize);
            usedBufferLength += paddingSize;
        }
    }
 
    void AppendString(LPCTSTR string) {
        AppendData(LPVOID(string), _tcslen(string) * sizeof(TCHAR));
    }
 
    void AppendData(void* data, int dataLength) {
        EnsureSpace(dataLength);
 
        memcpy((char*)dialogTemplate + usedBufferLength, data, dataLength);
        usedBufferLength += dataLength;
    }
 
    void EnsureSpace(int length) {
        if (length + usedBufferLength > totalBufferLength) {
            totalBufferLength += length * 2;
 
            void* newBuffer = malloc(totalBufferLength);
            memcpy(newBuffer, dialogTemplate, usedBufferLength);
 
            free(dialogTemplate);
            dialogTemplate = (DLGTEMPLATE*)newBuffer;
        }
    }
 
private:
    DLGTEMPLATE* dialogTemplate;
 
    int totalBufferLength;
    int usedBufferLength;
};


References


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