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[/] [or1k/] [tags/] [start/] [insight/] [tk/] [unix/] [tkUnixButton.c] - Rev 1765
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/* * tkUnixButton.c -- * * This file implements the Unix specific portion of the button * widgets. * * Copyright (c) 1996 by Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tkUnixButton.c,v 1.1.1.1 2002-01-16 10:26:01 markom Exp $ */ #include "tkButton.h" /* * Declaration of Unix specific button structure. */ typedef struct UnixButton { TkButton info; /* Generic button info. */ } UnixButton; /* * The class procedure table for the button widgets. */ TkClassProcs tkpButtonProcs = { NULL, /* createProc. */ TkButtonWorldChanged, /* geometryProc. */ NULL /* modalProc. */ }; /* *---------------------------------------------------------------------- * * TkpCreateButton -- * * Allocate a new TkButton structure. * * Results: * Returns a newly allocated TkButton structure. * * Side effects: * Registers an event handler for the widget. * *---------------------------------------------------------------------- */ TkButton * TkpCreateButton(tkwin) Tk_Window tkwin; { UnixButton *butPtr = (UnixButton *)ckalloc(sizeof(UnixButton)); return (TkButton *) butPtr; } /* *---------------------------------------------------------------------- * * TkpDisplayButton -- * * This procedure is invoked to display a button widget. It is * normally invoked as an idle handler. * * Results: * None. * * Side effects: * Commands are output to X to display the button in its * current mode. The REDRAW_PENDING flag is cleared. * *---------------------------------------------------------------------- */ void TkpDisplayButton(clientData) ClientData clientData; /* Information about widget. */ { register TkButton *butPtr = (TkButton *) clientData; GC gc; Tk_3DBorder border; Pixmap pixmap; int x = 0; /* Initialization only needed to stop * compiler warning. */ int y, relief; register Tk_Window tkwin = butPtr->tkwin; int width, height; int offset; /* 0 means this is a label widget. 1 means * it is a flavor of button, so we offset * the text to make the button appear to * move up and down as the relief changes. */ butPtr->flags &= ~REDRAW_PENDING; if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) { return; } border = butPtr->normalBorder; if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) { gc = butPtr->disabledGC; } else if ((butPtr->state == tkActiveUid) && !Tk_StrictMotif(butPtr->tkwin)) { gc = butPtr->activeTextGC; border = butPtr->activeBorder; } else { gc = butPtr->normalTextGC; } if ((butPtr->flags & SELECTED) && (butPtr->state != tkActiveUid) && (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) { border = butPtr->selectBorder; } /* * Override the relief specified for the button if this is a * checkbutton or radiobutton and there's no indicator. */ relief = butPtr->relief; if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) { relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN : TK_RELIEF_RAISED; } offset = (butPtr->type == TYPE_BUTTON) && !Tk_StrictMotif(butPtr->tkwin); /* * In order to avoid screen flashes, this procedure redraws * the button in a pixmap, then copies the pixmap to the * screen in a single operation. This means that there's no * point in time where the on-sreen image has been cleared. */ pixmap = Tk_GetPixmap(butPtr->display, Tk_WindowId(tkwin), Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin)); Tk_Fill3DRectangle(tkwin, pixmap, border, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT); /* * Display image or bitmap or text for button. */ if (butPtr->image != None) { Tk_SizeOfImage(butPtr->image, &width, &height); imageOrBitmap: TkComputeAnchor(butPtr->anchor, tkwin, 0, 0, butPtr->indicatorSpace + width, height, &x, &y); x += butPtr->indicatorSpace; x += offset; y += offset; if (relief == TK_RELIEF_RAISED) { x -= offset; y -= offset; } else if (relief == TK_RELIEF_SUNKEN) { x += offset; y += offset; } if (butPtr->image != NULL) { if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) { Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height, pixmap, x, y); } else { Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap, x, y); } } else { XSetClipOrigin(butPtr->display, gc, x, y); XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc, 0, 0, (unsigned int) width, (unsigned int) height, x, y, 1); XSetClipOrigin(butPtr->display, gc, 0, 0); } y += height/2; } else if (butPtr->bitmap != None) { Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height); goto imageOrBitmap; } else { TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY, butPtr->indicatorSpace + butPtr->textWidth, butPtr->textHeight, &x, &y); x += butPtr->indicatorSpace; x += offset; y += offset; if (relief == TK_RELIEF_RAISED) { x -= offset; y -= offset; } else if (relief == TK_RELIEF_SUNKEN) { x += offset; y += offset; } Tk_DrawTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout, x, y, 0, -1); Tk_UnderlineTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout, x, y, butPtr->underline); y += butPtr->textHeight/2; } /* * Draw the indicator for check buttons and radio buttons. At this * point x and y refer to the top-left corner of the text or image * or bitmap. */ if ((butPtr->type == TYPE_CHECK_BUTTON) && butPtr->indicatorOn) { int dim; dim = butPtr->indicatorDiameter; x -= butPtr->indicatorSpace; y -= dim/2; if (dim > 2*butPtr->borderWidth) { Tk_Draw3DRectangle(tkwin, pixmap, border, x, y, dim, dim, butPtr->borderWidth, (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN : TK_RELIEF_RAISED); x += butPtr->borderWidth; y += butPtr->borderWidth; dim -= 2*butPtr->borderWidth; if (butPtr->flags & SELECTED) { GC gc; gc = Tk_3DBorderGC(tkwin,(butPtr->selectBorder != NULL) ? butPtr->selectBorder : butPtr->normalBorder, TK_3D_FLAT_GC); XFillRectangle(butPtr->display, pixmap, gc, x, y, (unsigned int) dim, (unsigned int) dim); } else { Tk_Fill3DRectangle(tkwin, pixmap, butPtr->normalBorder, x, y, dim, dim, butPtr->borderWidth, TK_RELIEF_FLAT); } } } else if ((butPtr->type == TYPE_RADIO_BUTTON) && butPtr->indicatorOn) { XPoint points[4]; int radius; radius = butPtr->indicatorDiameter/2; points[0].x = x - butPtr->indicatorSpace; points[0].y = y; points[1].x = points[0].x + radius; points[1].y = points[0].y + radius; points[2].x = points[1].x + radius; points[2].y = points[0].y; points[3].x = points[1].x; points[3].y = points[0].y - radius; if (butPtr->flags & SELECTED) { GC gc; gc = Tk_3DBorderGC(tkwin, (butPtr->selectBorder != NULL) ? butPtr->selectBorder : butPtr->normalBorder, TK_3D_FLAT_GC); XFillPolygon(butPtr->display, pixmap, gc, points, 4, Convex, CoordModeOrigin); } else { Tk_Fill3DPolygon(tkwin, pixmap, butPtr->normalBorder, points, 4, butPtr->borderWidth, TK_RELIEF_FLAT); } Tk_Draw3DPolygon(tkwin, pixmap, border, points, 4, butPtr->borderWidth, (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN : TK_RELIEF_RAISED); } /* * If the button is disabled with a stipple rather than a special * foreground color, generate the stippled effect. If the widget * is selected and we use a different background color when selected, * must temporarily modify the GC. */ if ((butPtr->state == tkDisabledUid) && ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) { if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn && (butPtr->selectBorder != NULL)) { XSetForeground(butPtr->display, butPtr->disabledGC, Tk_3DBorderColor(butPtr->selectBorder)->pixel); } XFillRectangle(butPtr->display, pixmap, butPtr->disabledGC, butPtr->inset, butPtr->inset, (unsigned) (Tk_Width(tkwin) - 2*butPtr->inset), (unsigned) (Tk_Height(tkwin) - 2*butPtr->inset)); if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn && (butPtr->selectBorder != NULL)) { XSetForeground(butPtr->display, butPtr->disabledGC, Tk_3DBorderColor(butPtr->normalBorder)->pixel); } } /* * Draw the border and traversal highlight last. This way, if the * button's contents overflow they'll be covered up by the border. * This code is complicated by the possible combinations of focus * highlight and default rings. We draw the focus and highlight rings * using the highlight border and highlight foreground color. */ if (relief != TK_RELIEF_FLAT) { int inset = butPtr->highlightWidth; if (butPtr->defaultState == tkActiveUid) { /* * Draw the default ring with 2 pixels of space between the * default ring and the button and the default ring and the * focus ring. Note that we need to explicitly draw the space * in the highlightBorder color to ensure that we overwrite any * overflow text and/or a different button background color. */ Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset, inset, Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset, 2, TK_RELIEF_FLAT); inset += 2; Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset, inset, Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset, 1, TK_RELIEF_SUNKEN); inset++; Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, inset, inset, Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset, 2, TK_RELIEF_FLAT); inset += 2; } else if (butPtr->defaultState == tkNormalUid) { /* * Leave room for the default ring and write over any text or * background color. */ Tk_Draw3DRectangle(tkwin, pixmap, butPtr->highlightBorder, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 5, TK_RELIEF_FLAT); inset += 5; } /* * Draw the button border. */ Tk_Draw3DRectangle(tkwin, pixmap, border, inset, inset, Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset, butPtr->borderWidth, relief); } if (butPtr->highlightWidth != 0) { GC gc; if (butPtr->flags & GOT_FOCUS) { gc = Tk_GCForColor(butPtr->highlightColorPtr, pixmap); } else { gc = Tk_GCForColor(Tk_3DBorderColor(butPtr->highlightBorder), pixmap); } /* * Make sure the focus ring shrink-wraps the actual button, not the * padding space left for a default ring. */ if (butPtr->defaultState == tkNormalUid) { TkDrawInsetFocusHighlight(tkwin, gc, butPtr->highlightWidth, pixmap, 5); } else { Tk_DrawFocusHighlight(tkwin, gc, butPtr->highlightWidth, pixmap); } } /* * Copy the information from the off-screen pixmap onto the screen, * then delete the pixmap. */ XCopyArea(butPtr->display, pixmap, Tk_WindowId(tkwin), butPtr->copyGC, 0, 0, (unsigned) Tk_Width(tkwin), (unsigned) Tk_Height(tkwin), 0, 0); Tk_FreePixmap(butPtr->display, pixmap); } /* *---------------------------------------------------------------------- * * TkpComputeButtonGeometry -- * * After changes in a button's text or bitmap, this procedure * recomputes the button's geometry and passes this information * along to the geometry manager for the window. * * Results: * None. * * Side effects: * The button's window may change size. * *---------------------------------------------------------------------- */ void TkpComputeButtonGeometry(butPtr) register TkButton *butPtr; /* Button whose geometry may have changed. */ { int width, height, avgWidth; Tk_FontMetrics fm; if (butPtr->highlightWidth < 0) { butPtr->highlightWidth = 0; } butPtr->inset = butPtr->highlightWidth + butPtr->borderWidth; /* * Leave room for the default ring if needed. */ if (butPtr->defaultState != tkDisabledUid) { butPtr->inset += 5; } butPtr->indicatorSpace = 0; if (butPtr->image != NULL) { Tk_SizeOfImage(butPtr->image, &width, &height); imageOrBitmap: if (butPtr->width > 0) { width = butPtr->width; } if (butPtr->height > 0) { height = butPtr->height; } if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) { butPtr->indicatorSpace = height; if (butPtr->type == TYPE_CHECK_BUTTON) { butPtr->indicatorDiameter = (65*height)/100; } else { butPtr->indicatorDiameter = (75*height)/100; } } } else if (butPtr->bitmap != None) { Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height); goto imageOrBitmap; } else { Tk_FreeTextLayout(butPtr->textLayout); butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont, butPtr->text, -1, butPtr->wrapLength, butPtr->justify, 0, &butPtr->textWidth, &butPtr->textHeight); width = butPtr->textWidth; height = butPtr->textHeight; avgWidth = Tk_TextWidth(butPtr->tkfont, "0", 1); Tk_GetFontMetrics(butPtr->tkfont, &fm); if (butPtr->width > 0) { width = butPtr->width * avgWidth; } if (butPtr->height > 0) { height = butPtr->height * fm.linespace; } if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) { butPtr->indicatorDiameter = fm.linespace; if (butPtr->type == TYPE_CHECK_BUTTON) { butPtr->indicatorDiameter = (80*butPtr->indicatorDiameter)/100; } butPtr->indicatorSpace = butPtr->indicatorDiameter + avgWidth; } } /* * When issuing the geometry request, add extra space for the indicator, * if any, and for the border and padding, plus two extra pixels so the * display can be offset by 1 pixel in either direction for the raised * or lowered effect. */ if ((butPtr->image == NULL) && (butPtr->bitmap == None)) { width += 2*butPtr->padX; height += 2*butPtr->padY; } if ((butPtr->type == TYPE_BUTTON) && !Tk_StrictMotif(butPtr->tkwin)) { width += 2; height += 2; } Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->indicatorSpace + 2*butPtr->inset), (int) (height + 2*butPtr->inset)); Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset); }