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/*

 * tixWinDraw.c --

 *

 *      Implement the Windows specific function calls for drawing.

 *

 * Copyright (c) 1996, Expert Interface Technologies

 *

 * See the file "license.terms" for information on usage and redistribution

 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.

 *

 */

#include <tkInt.h>

#include <tkWinInt.h>

#include <tixInt.h>

#include <tixPort.h>

/*----------------------------------------------------------------------

 * TixpDrawTmpLine --

 *

 *      Draws a "temporarily" line on the desktop window with XOR

 *      drawing mode. This function is used by the PanedWindow and

 *      ResizeHandler to draw the rubberband lines. Calling the

 *      function again with the same parameters cancels the temporary

 *      lines without affecting what was originally on the screen.

 *----------------------------------------------------------------------

 */

void

TixpDrawTmpLine(x1, y1, x2, y2, tkwin)

    int x1;

    int y1;

    int x2;

    int y2;

    Tk_Window tkwin;

{

    HWND desktop;

    HDC hdc;

    HPEN hpen;

    HGDIOBJ old;

    desktop = GetDesktopWindow();

    hdc = GetWindowDC(desktop);

    hpen = CreatePen(PS_SOLID, 0, RGB(255,255,255));

    old = SelectObject(hdc, hpen);

    SetROP2(hdc, R2_XORPEN);

    MoveToEx(hdc, x1, y1, NULL);

    LineTo(hdc, x2, y2);

    SelectObject(hdc, old);

    DeleteObject(hpen);

    ReleaseDC(desktop, hdc);

}

/*----------------------------------------------------------------------

 * TixpDrawAnchorLines --

 *

 *      See comments near Tix_DrawAnchorLines.

 *----------------------------------------------------------------------

 */

void

TixpDrawAnchorLines(display, drawable, gc, x, y, w, h)

    Display *display;

    Drawable drawable;

    GC gc;

    int x;

    int y;

    int w;

    int h;

{

    HDC hdc;

    TkWinDCState state;

    HPEN hpen;

    HGDIOBJ old;

    hdc = TkWinGetDrawableDC(display, drawable, &state);

    hpen = CreatePen(PS_DOT, 1, gc->foreground);

    old = SelectObject(hdc, hpen);

    MoveToEx(hdc, x, y, NULL);

    LineTo(hdc, x,     y+h-1);

    LineTo(hdc, x+w-1, y+h-1);

    LineTo(hdc, x+w-1, y);

    LineTo(hdc, x,     y);

    SelectObject(hdc, old);

    DeleteObject(hpen);

    TkWinReleaseDrawableDC(drawable, hdc, &state);

}

/*----------------------------------------------------------------------

 * TixpStartSubRegionDraw --

 *

 *      Limits the subsequent drawing operations into the prescribed

 *      rectangle region. This takes effect up to a matching

 *      TixEndSubRegionDraw() call.

 *

 * Return value:

 *      none.

 *----------------------------------------------------------------------

 */

void

TixpStartSubRegionDraw(display, drawable, gc, subRegPtr, origX, origY,

        x, y, width, height, needWidth, needHeight)

    Display *display;

    Drawable drawable;

    GC gc;

    TixpSubRegion * subRegPtr;

    int origX;

    int origY;

    int x;

    int y;

    int width;

    int height;

    int needWidth;

    int needHeight;

{

    TkWinDrawable * wdrPtr;

    int depth;

    if ((width < needWidth) || (height < needHeight)) {

        subRegPtr->origX  = origX;

        subRegPtr->origY  = origY;

        subRegPtr->x      = x;

        subRegPtr->y      = y;

        subRegPtr->width  = width;

        subRegPtr->height = height;

        /*

         * Find out the depth of the drawable and create a pixmap of

         * the same depth.

         */

        wdrPtr = (TkWinDrawable *)drawable;

        if (wdrPtr->type == TWD_BITMAP) {

            depth = wdrPtr->bitmap.depth;

        } else {

            depth = wdrPtr->window.winPtr->depth;

        }

        subRegPtr->pixmap = Tk_GetPixmap(display, drawable, width, height,

                depth);

        if (subRegPtr->pixmap != None) {

            /*

             * It could be None if we have somehow exhausted the Windows

             * GDI resources.

             */

            XCopyArea(display, drawable, subRegPtr->pixmap, gc, x, y,

                    width, height, 0, 0);

        }

    } else {

        subRegPtr->pixmap = None;

    }

}

/*----------------------------------------------------------------------

 * TixpEndSubRegionDraw --

 *

 *

 *----------------------------------------------------------------------

 */

void

TixpEndSubRegionDraw(display, drawable, gc, subRegPtr)

    Display *display;

    Drawable drawable;

    GC gc;

    TixpSubRegion * subRegPtr;

{

    if (subRegPtr->pixmap != None) {

        XCopyArea(display, subRegPtr->pixmap, drawable, gc, 0, 0,

                subRegPtr->width, subRegPtr->height,

                subRegPtr->x, subRegPtr->y);

        Tk_FreePixmap(display, subRegPtr->pixmap);

        subRegPtr->pixmap = None;

    }

}

/*

 *----------------------------------------------------------------------

 *

 * TixpSubRegDisplayText --

 *

 *      Display a text string on one or more lines in a sub region.

 *

 * Results:

 *      See TkDisplayText

 *

 * Side effects:

 *      See TkDisplayText

 *

 *----------------------------------------------------------------------

 */

void

TixpSubRegDisplayText(display, drawable, gc, subRegPtr, font, string,

        numChars, x, y, length, justify, underline)

    Display *display;           /* X display to use for drawing text. */

    Drawable drawable;          /* Window or pixmap in which to draw the

                                 * text. */

    GC gc;                      /* Graphics context to use for drawing text. */

    TixpSubRegion * subRegPtr;  /* Information about the subregion */

    TixFont font;               /* Font that determines geometry of text

                                 * (should be same as font in gc). */

    char *string;               /* String to display;  may contain embedded

                                 * newlines. */

    int numChars;               /* Number of characters to use from string. */

    int x, y;                   /* Pixel coordinates within drawable of

                                 * upper left corner of display area. */

    int length;                 /* Line length in pixels;  used to compute

                                 * word wrap points and also for

                                 * justification.   Must be > 0. */

    Tk_Justify justify;         /* How to justify lines. */

    int underline;              /* Index of character to underline, or < 0

                                 * for no underlining. */

{

    if (subRegPtr->pixmap != None) {

        TixDisplayText(display, subRegPtr->pixmap, font, string,

                numChars, x - subRegPtr->x, y - subRegPtr->y,

                length, justify, underline, gc);

    } else {

        TixDisplayText(display, drawable, font, string,

                numChars, x, y, length, justify, underline, gc);

    }

}

/*----------------------------------------------------------------------

 * TixpSubRegFillRectangle --

 *

 *

 *----------------------------------------------------------------------

 */

void

TixpSubRegFillRectangle(display, drawable, gc, subRegPtr, x, y, width, height)

    Display *display;           /* X display to use for drawing rectangle. */

    Drawable drawable;          /* Window or pixmap in which to draw the

                                 * rectangle. */

    GC gc;                      /* Graphics context to use for drawing. */

    TixpSubRegion * subRegPtr;  /* Information about the subregion */

    int x, y;                   /* Pixel coordinates within drawable of

                                 * upper left corner of display area. */

    int width, height;          /* Size of the rectangle. */

{

    if (subRegPtr->pixmap != None) {

        XFillRectangle(display, subRegPtr->pixmap, gc,

                x - subRegPtr->x, y - subRegPtr->x, width, height);

    } else {

        XFillRectangle(display, drawable, gc, x, y, width, height);

    }

}

/*----------------------------------------------------------------------

 * TixpSubRegDrawImage  --

 *

 *      Draws a Tk image in a subregion.

 *----------------------------------------------------------------------

 */

void

TixpSubRegDrawImage(subRegPtr, image, imageX, imageY, width, height,

        drawable, drawableX, drawableY)

    TixpSubRegion * subRegPtr;

    Tk_Image image;

    int imageX;

    int imageY;

    int width;

    int height;

    Drawable drawable;

    int drawableX;

    int drawableY;

{

    if (subRegPtr->pixmap != None) {

        Tk_RedrawImage(image, imageX, imageY, width, height, subRegPtr->pixmap,

                drawableX - subRegPtr->x, drawableY - subRegPtr->y);

    } else {

        Tk_RedrawImage(image, imageX, imageY, width, height, drawable,

                drawableX, drawableY);

    }

}

void

TixpSubRegDrawBitmap(display, drawable, gc, subRegPtr, bitmap, src_x, src_y,

        width, height, dest_x, dest_y, plane)

    Display *display;

    Drawable drawable;

    GC gc;

    TixpSubRegion * subRegPtr;

    Pixmap bitmap;

    int src_x, src_y;

    int width, height;

    int dest_x, dest_y;

    unsigned long plane;

{

    XSetClipOrigin(display, gc, dest_x, dest_y);

    if (subRegPtr->pixmap != None) {

        XCopyPlane(display, bitmap, subRegPtr->pixmap, gc, src_x, src_y,

                width, height, dest_x - subRegPtr->x, dest_y - subRegPtr->y,

                plane);

    } else {

        XCopyPlane(display, bitmap, drawable, gc, src_x, src_y, width, height,

                dest_x, dest_y, plane);

    }

    XSetClipOrigin(display, gc, 0, 0);

}