发表于 2009-1-5 19:48
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MFC 鎵撳嵃棰勮 鏄犲皠妯″紡 鍧愭爣鍙樻崲
鍙戝竷: 2008-6-26 12:38 | 浣滆: admin | 鏌ョ湅: 52娆
MFC鎻愪緵浜嗕竴涓鏋舵х殑鎵撳嵃鍜屾墦鍗伴瑙堝姛鑳戒唬鐮侊紝瀹冪殑鍩烘湰鎬濇兂鏄皢瀹為檯鏄剧ず鍜屾墦鍗版枃妗ｇ殑浠ｇ爜鍚堜簩涓轰竴锛屽嵆閮界敱姝ゆ枃妗ｅ叧鑱旂殑CView涓殑OnDraw(CDC *pDC)鏉ュ鐞嗭紝鐢盡FC妗嗘灦鏍规嵁鐢ㄦ埛鐨勬搷浣滄潵鍐冲畾浼犺繘鏉ョ殑pDC鏄寚鍚戝睆骞曡繕鏄墦鍗版満锛屽綋pDC鎸囧悜灞忓箷璁惧锛屽氨鍦ㄥ睆骞曚笂鏄剧ず鏂囨。锛屽綋鎸囧悜鎵撳嵃鏈鸿澶囨椂灏辨墦鍗版枃妗ｃ傝繖浜涢兘寰堝ソ鐞嗚В锛屼絾鏄紝褰撴垜浠鎵撳嵃棰勮鏃讹紝浼犺繘鏉ョ殑pDC灏辨湁浜涚壒鍒簡銆傚洜涓烘墦鍗伴瑙堟槸鍦ㄥ睆骞曚笂杩涜鐨勶紝鎵浠ラ氬父鎴戜滑浼氳涓鸿繖鏃朵紶杩涙潵鐨刾DC涓瀹氫篃鏄睘浜庡睆骞旸C涓绫荤殑銆備絾鏄叾瀹炰笉鐒讹紝杩欎釜pDC鏄牴鎹綋鍓嶉粯璁ょ殑鎵撳嵃鏈虹殑灞炴ф潵鏋勯犵殑銆備妇涓緥瀛愶紝鎴戠殑璁＄畻鏈轰笂瀹夎浜嗕竴涓墦鍗版満锛屽畠鐨勯粯璁ゆ墦鍗扮焊鏄疉4澶у皬(210mm X 297mm),鑰屽畠鐨勯粯璁ゅ垎杈ㄧ巼鏄1200dpi銆傚綋鎵撳嵃棰勮鏃禖view::OnDraw鍑芥暟涓殑pDC鎸囧悜鐨勫氨鏄偅涓敤鏉ラ瑙堣緭鍑虹殑DC锛岀幇鍦ㄦ垜浠皟鐢╬DC->GetDeviceCaps(HORZSIZE),pDC->GetDeviceCaps(VERTSIZE)锛岃繖涓や釜鍑芥暟鐢ㄦ潵鍙栧緱DC鏄剧ず鍖哄煙鐨勫ぇ灏忥紝浠ユ绫充负鍗曚綅锛屽緱鍒扮殑杩斿洖鍊间负210鍜297锛岃繖鎭板ソ灏辨槸A4绾哥殑澶у皬銆傛帴鐫鍐嶈皟鐢╬DC->GetDeviceCaps(HORZRES),pDC->GetDeviceCaps(VERTRES)锛岃繖涓や釜璋冪敤杩斿洖鐨勪篃鏄疍C鏄剧ず鍖哄煙鐨勫ぇ灏忥紝涓嶈繃鍗曚綅鏄薄绱(鎴栬呰鏄偣dot)锛屽緱鍒扮殑鍊兼槸9917鍜14031銆傝鎴戜滑鐪嬬湅杩欎袱涓间笌涓婇潰鐨210鍜297鏈変粈涔堝叧绯汇1鑻卞绛変簬25.4姣背锛岄偅涔210姣背鐨勯暱搴︽寜鐓1200dpi鐨勫垎杈ㄧ巼鑳藉绾冲灏戠偣锛熷綋鐒舵槸210/25.4脳1200锛岀畻绠楃湅绛変簬澶氬皯锛熸病閿欙紝灏辨槸9917宸﹀彸(瀹為檯鏄9921.259鈥︹)锛屽悓鏍峰彲浠ュ皢297鎹㈢畻鎴14031銆
鐜板湪鏉ョ湅鐪嬪彟澶栦竴涓棶棰樸傚綋鎴戜滑鐢∕emDC.CreateCompatibleDC(pDC)鏉ュ垱寤轰竴涓笌pDC鍏煎鐨勫唴瀛楧C鏃讹紝璋冪敤GetDeviceCaps(HORZSIZE)绛夊嚱鏁板緱鍒扮殑鍊兼槸鍚︿笌pDC鐨勪竴鏍峰憿锛熺瓟妗堟槸涓嶄竴鏍枫傚鍐呭瓨DC璋冪敤涓婅堪4涓嚱鏁板緱鍒扮殑鍊煎垎鍒槸320鍜240(Windows涓鑸浐瀹氳繑鍥炶繖涓や釜鏁板)锛1024鍜768(杩欐鏄睆骞曠殑鍒嗚鲸鐜)銆傚亣濡俻DC鐨勬槧灏勬ā寮忔槸MM_LOMETRIC锛岄偅涔圡emDC鐨勬槧灏勬ā寮忎細鍜屽畠涓鏍峰悧锛熻繕鏄笉涓鏍枫侻emDC鍦ㄥ垰鍒涘缓鐨勬椂鍊欐槧灏勬ā寮忓氨鏄粯璁ょ殑MM_TEXT锛岃屼笉浼氬拰pDC涓鏍枫傞偅涔堝綋鎵ц濡備笅鎿嶄綔锛歱DC->SetMapMode(MM_LOMETRIC);MemDC.SetMapMode(MM_LOMETRIC);鍚庯紝瀵瑰悓涓涓狢Rect杩涜DPtoLP,鎴栬匧PtoDP寰楀埌鐨勭粨鏋滀竴鏍峰悧锛熶粛鐒朵笉涓鏍凤紝涓轰粈涔堟槧灏勬ā寮忕浉鍚屼簡锛屽潗鏍囪浆鎹㈢殑缁撴灉杩樻槸涓嶄竴鏍凤紵
鎴戜滑鏉ュ紕娓呮WINDOWS鐨勬槧灏勬ā寮忓埌搴曟庝箞涓鍥炰簨銆傚浜嶥C鏉ヨ鏈変袱涓尯鍩燂紝涓涓彨鈥滆鍙ｂ(Viewport)锛屼竴涓彨鈥滅獥鍙ｂ(Window,涓庢櫘閫氱殑鏄剧ず鍑虹殑绐楀彛涓嶄竴鏍凤紝鍙槸涓涓蹇)銆備綘鍙互鎶娾滅獥鍙ｂ濇兂璞℃垚涓涓昏緫涓婄殑缁樺浘鍖哄煙锛岃屾墍璋撶殑閫昏緫鍧愭爣绯诲氨鏄熀浜庘滅獥鍙ｂ濈殑銆傚亣璁句互DC鐨(0,0)鐐逛负宸︿笂椤剁偣鐢讳竴涓20脳20鐨勭煩褰紝浣犲氨鍙互鎶婂畠鐞嗚В鎴愬湪鈥滅獥鍙ｂ濅腑鐢荤殑锛屽彲鏄害閲忓崟浣嶆槸浠涔堝憿锛熼偅灏辫鏍规嵁DC鐨勫綋鍓嶆槧灏勬ā寮忔潵瀹氫簡锛屾瘮濡傜幇鍦ㄧ殑妯″紡鏄疢M_LOMETRIC锛岄偅涔堝崟浣嶅氨鏄0.1mm锛屼篃灏辨槸鎴戜滑鍦ㄨ繖涓狣C涓婄敾浜嗕竴涓2mm脳2mm澶у皬鐨勭煩褰€傗滆鍙ｂ濇槸涓涓笌瀹為檯鏄剧ず璁惧绱у瘑鐩歌繛鐨勬蹇碉紝瀹冨搴旂潃瀹為檯鐨勮緭鍑哄尯鍩燂紝璁惧鍧愭爣绯诲氨鏄熀浜庡畠鐨勶紝鑰屽害閲忓崟浣嶅垯姘歌繙鏄薄绱犮侱C鏍规嵁瑙嗗彛鍜岀獥鍙ｇ殑灞炴т骇鐢熶竴绉嶈鍒欎繚璇佹妸涓涓獥鍙ｆ伆濂芥槧灏勪负涓涓鍙ｃ傚緟鎴戜滑鐪熸瑕佹樉绀烘垨鎵撳嵃鍥惧舰鐨勬椂鍊欙紝DC瀹為檯涓婄敤杩欑瑙勫垯鎶奧indow鍧愭爣(閫昏緫鍧愭爣)鏄犲皠涓篤iewport鍧愭爣(璁惧鍧愭爣)杩涜杈撳嚭锛岃嚦浜嶥C浼氭妸2mm鐨勭嚎娈佃浆鎹负澶氬皯璞＄礌闀跨殑绾挎锛屾垜浠棤闇鍏冲績锛學INDOWS鑷細鏂欑悊涓鍒囥侰DC鍒嗗埆鎻愪緵GetViewportOrg(),GetWindowOrg()鏉ュ彇寰梀iewport鍜學indow鐨勫師鐐瑰潗鏍(鐩稿浜庝竴涓亣鎯崇殑涓珛鐨勫潗鏍囩郴)锛岃繕鏈塆etViewportExt()锛孏etWindowExt()鏉ュ彇寰梀iewport鍜學indow澶у皬(鍒嗗埆鍩轰簬浠栦滑鍚勮嚜鐨勫害閲忓崟浣)銆傞偅涔圖PtoLP鍜孡PtoDP鍒板簳鍋氫簡浜涗粈涔堝憿锛熷叾瀹炲緢绠鍗曪紝鎷縇PtoDP鏉ヨ灏辨槸鎵ц浜嗚繖鏍蜂竴涓繍绠楋細
xViewport=(xWindow-oxWindow)脳cxViewport/cxWindow+oxViewport
yViewport=(yWindow-oyWindow)脳cyViewport/cyWindow+oyViewport
鑰孌PtoLP鍒欐槸涓婅堪杩愮畻鐨勯嗚繍绠椼傝繕鎷垮垰鎵嶇殑pDC,MemDC鏉ヨ锛屾槧灏勬ā寮忛兘鏄疢M_LOMETRIC,鎵撳嵃璁剧疆涓嶅彉銆傚pDC璋冪敤GetViewportOrg绛夊嚱鏁板緱鍒癡iewport鍘熺偣涓(0,0)锛屽ぇ灏忎负9917脳-14031璞＄礌(娌￠敊锛屾槸璐熺殑锛屽洜涓篗M_LOMETRIC涓媦杞存柟鍚戞湞涓)锛學indow鍘熺偣涓(0,0)锛屽ぇ灏忎负2099脳2970(0.1mm)锛涘悓鏍峰緱鍒癕emDC鐨刅iewport鍘熺偣涓(0,0),澶у皬涓1024脳锛768璞＄礌锛學indow鍘熺偣涓(0,0),澶у皬涓3200脳2400(0.1mm)銆傝繖灏卞彲浠ヨВ閲妏DC鍜孧emDC鐨勫潗鏍囪浆鎹负浠涔堜笉鍚屼簡銆
