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Visual Basic Form | 1995-11-01 | 18KB | 358 lines

Form1 QCard.DLL Demo Form1% Timer1 Dra&wing DrawCard Draw&Card DealCard &DealCard DrawBack Draw&Back DrawSymbol Draw&Symbol RemoveCard &RemoveCard MenuExit E&xit Information &Information CardInformation &CardInformation Dragging &Dragging MenuDoDrag D&oDrag MenuHelp &Help m MenuHowTo Ho&w To... n MenuAbout A&bout Form_Click DealCard Form1 Form_Loadi InitializeDecke Form_MouseDown Buttons Shift View_Click DealCard_Click DrawBack_Click( DrawBack~ MenuExit_Click DrawSymbol_Click DrawSymbol EraseCard_Click DrawCard& Timer1 EnabledE TRUEr Timer1_TimerA EraseCard FALSEC CARDWIDTHu CARDHEIGHT DrawCard_Click RemoveCard RemoveCard_Click. CardInformation_ClickY bDragging Form_MouseMove[ Form_MouseUpq GetCardColorQ GetCardValue GetCardSuit GetCardX| GetCardY IsCardVisible Width2 Height ScaleMode ScaleTop ScaleLeft Information_Click ScaleWidth ScaleHeight> bDragDemo SPACER MenuDoDrag_Click AdjustCardBlocked ActiveCard PointInCard nActiveCardH SetActiveCard InitDrag DoDrag) EndDrag OldY5 Dragging_Click ReturnDrag PointInFreeCard Screen# MousePointer. InitDeck Form_Paint SetCardDisabled, Picture1 nReturn PointInCardTop~ Form_DblClick nClickedCard GlobalXf GlobalY DblClkX[ DblClickX DblClickY nSpacer OFFSET BlockCardsf BlockDrag OffsetX OffsetY EndBlockDrag bSingleDraggingc bBlockDragging bBlockDrag SetDefaultValues ReturnBlockDragr DragCardsN Form2 upperbound! lowerbound Lefte fresh GetFreeDestination GetCardBlocked nEndDrag nTemp AbortDrag nSourceCard nDestCard9 CardArray Counter cxSpacer| SetUser3 SetUser4 nStatus nArrayID nArrayPos nItems' GetUser4 GetUser3+ nNewXD nNewY nSourceArrayV nSourceArrayPosq nDestArray nSourceColor nDestColor o_Click nSourceArrayID nDestArrayID nDeltaX nDeltaY nSourceX| nSourceY nUnused SetCardBlocked dlbClickY DlbClickX nThisSourceCard nThisDestCard bMouseMoved7 process clicks similarR MenuHowTo_Click Helpn MenuAbout_Click About AutoRedraw nDrawSelection SelectCase nInformationCard DoText nCard MenuHelp_Click GetCardStatus SetCurrentBack SetCardStatus FACEDOWN FACEUP This program demonstrates some of the function callss of QCard.DLL. In an effort to keep all code under their respective Event Procedures, I have not usedd any Sub procedures of my own. Using a few Sub proceduress would considerably clean up the "spaghetti" nature of some of the dragging events.t This demo is not complete in that it does not repaint it's window properly. I was more interested in demonsrating function calls rather than creating a usable product. declare a few counters declare some test switchesn declare some card identifiers to save mouse position for double click event set up a two dimensional arrayy four arrays to hold the numbers of thee cards in each piled set up a counter to go along with each pile CardInformation_Click pick a random cardi pick a random locationt Int((upperbound - lowerbound + 1) * Rnd + lowerbound)) set current information card for Paint eventt deal the card draw in the text informationr DealCard_Click deal cards in a diagonal line DoText Card number is Card color is Card value is Card suit is Card x location is Card y location is Card Status value is Form ScaleWidth is Form ScaleHeight is DrawBack_Click draw six piles of cards offsetting by 2 pixels up and overr DrawCard_Click draw the cards using DrawCard this does not update any of the propertiess of the cardst DrawSymbol_Click draw in one of each of the three symbolss Form_DblClick Only process DblClick in Drag Demo You can process double clicks in a similar way to the ButtonUp event.c The current mouse position is saved for us in the ButtonDown event as DblClickX and DblClickY Instead of using the Shared variables nSourceCard and nDestCard, we will use two local variabless nThisSourceCard and nThisDestCard.. We need to do this because VB processes ButtonDownn and ButtonUp messages before it actually gets too the DblClick event. This will keep our currentt selections from being corrupted by one of the other eventsr We can use the PointInFreeCard function to determinee if the mouse is within any card that is not blocked pick a destination pile according to original pileE if this is the last card in a row, and not the only card in the row then move it over to the other "same color row" and adjust arrays and blocks Form_Load try to fire up the DLLL a FALSE return value indicates problems Sorry. Another application is using QCards.DLL set ScaleMode to Pixel(3) so form and DLL use the same coordinatess make form full screen width make some initial assigns Form_MouseDown InitDrag returns the number of the card that contains the mouse, as well as setting up the drag operation save mouse x and y position for double click eventt no card selecteds save old position for later use if the drag is invalidh if card is not blocked, it is a single drag if it's blocked, it means were doing a block drag Form_MouseMove if just a single card, it's number was set with InitDrag call determine which pile we are dealing withr determine the position of the first card in dragn how many cards are we movinge create an array to hold the numbers of the cards to movee and fill the array starting at 0e pass the BlockDrag sub the actual array, referencing it's first element. This acts as a "pointer" to the rest ofs the elements in the array in memory let the MouseUp event know that it is ok to reference the Temp(0) array for this instance Form_MouseUp most of the code here involves relocating cards to their new homes/arrays end the drag operation and find out who we are dropping in on do some color testing only allow drop if source and destination colors are the same and if nSourceCard is not the last card in it's pile. if nDestCard is 0, the Source Card was dropped at an invalid location if not a valid drop site, return drag valid single drag/drop... proceed with relocation which array did we come fromt reduce our old array countert which array are we joining add another to it's counter block our new neighbor install our new arrayID and positiong align with left side of card above us and down OFFSET (16)o unblock last card in old array add ourselves to new arrayr we can reuse the Temp() array from MouseMovee as long as MouseMove actually occurredc end the drag and find out the destination card do some color testing only allow drop if source and destination colors are the same and nSourceCard is not the last card in it's pile if not a valid drop site, return drag which array did we come from reduce our old array counter which array are we joining block our new neighbor this bit of code demonstrates how you can "fool" a drag operation to drag the item to a specific location. Usually, you pass the BlockDrag sub the x,y location of the mouse. If you first determine your current mouse position in relation to the object you are dragging you can add that difference (nDeltaX, nDeltaY) to the position youi want to drag to, and pass those points to BlockDrag. We want to align with the left side of DestCard and down OFFSET (16) pixels from its top install our new arrayIDs and positionsn unblock last card in old arrayy remove temporary block on last card in block drag array There was a MouseDown event but no MouseMove evente Form_Paint Even when the AutoRedraw property for yourr form is set to TRUE, VB will not redraw any of your cards for you. You must handle thee redrawing in the Paint Event. In a normal cardd game, your Paint Event will look a lot like Case 6 beloww MenuAbout_Click Form1.Refreshh MenuDoDrag_Click clear out any old card properties draw in symbols each pile has it's own array identifying the cardss each pile has a counter to maintain the pilee each card uses it's User3 and User4 properties to store which array it belongs to and what position it's in within the array. This makes dragging and dropping easier deal first pile and set up array card's position in array array ID block all cards except the one on top there are 13 cards per pile card's position in array array IDc card's position in array array IDc card's position in array array IDc MenuExit_Click MenuHowTo_Click winhelp.exe \qcard.hlp RemoveCard_Click deal 13 cards and enable the timer sub which will remove them Timer1_Timer remove cards one at a timee don't forget to take them off in reverse orderr or you will have a mess