From 16e9630b79f0a7a90c6cedb6781175bb8b337dc1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Sat, 29 Apr 2017 12:11:08 +0200 Subject: New upstream version 4.3.0 --- app/wlib/gtklib/single.c | 335 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 335 insertions(+) create mode 100644 app/wlib/gtklib/single.c (limited to 'app/wlib/gtklib/single.c') diff --git a/app/wlib/gtklib/single.c b/app/wlib/gtklib/single.c new file mode 100644 index 0000000..45ed6e4 --- /dev/null +++ b/app/wlib/gtklib/single.c @@ -0,0 +1,335 @@ +/** \file single.c + * Single line entry field for text + */ + +/* XTrkCad - Model Railroad CAD + * Copyright (C) 2005 Dave Bullis, 2012 Martin Fischer + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#define GTK_DISABLE_SINGLE_INCLUDES +#define GDK_DISABLE_DEPRECATED +// #define GTK_DISABLE_DEPRECATED +#define GSEAL_ENABLE + +#include +#include +#include +#include + +#include +#include + +#include "gtkint.h" + +#define TIMEOUT_INACTIVITY (500) /**< timeout for entry fields in millisecs */ + +/* + ***************************************************************************** + * + * Text Boxes + * + ***************************************************************************** + */ + +struct wString_t { + WOBJ_COMMON + char *valueP; /**< pointer to result buffer */ + wIndex_t valueL; /**< maximum length */ + wStringCallBack_p action; /**< callback for changes */ + wBool_t busy; /**< busy flag to prevent re-entry problems? */ + wBool_t hasSignal; /** needs signal to be suppressed */ + guint timer; /**< timer source for inactivity timer */ +}; + +/** + * Set the string value in a string entry field + * + * \param b IN widget to be updated + * \param arg IN new string value + * \return + */ + +void wStringSetValue( + wString_p b, + const char *arg) +{ + if (b->widget == NULL) + abort(); + + // the contents should not be changed programatically while + // the user is editing it + if( !(gtk_widget_has_focus(b->widget))) { + if (b->hasSignal) + gtk_signal_handler_block_by_data(GTK_OBJECT(b->widget), b); + gtk_entry_set_text(GTK_ENTRY(b->widget), arg); + if (b->hasSignal) + gtk_signal_handler_unblock_by_data(GTK_OBJECT(b->widget), b); + } +} + +/** + * Set the width of the entry field + * + * \param b IN widget to be updated + * \param w IN new width + * \return + */ + +void wStringSetWidth( + wString_p b, + wPos_t w) +{ + gtk_widget_set_size_request(b->widget, w, -1); + b->w = w; +} + +/** + * Return the entered value + * + * \param b IN entry field + * \return the entered text + */ + +const char *wStringGetValue( + wString_p b) +{ + if ( !b->widget ) + abort(); + + return gtk_entry_get_text(GTK_ENTRY(b->widget)); +} + +/** + * Kill an active timer + * + * \param b IN entry field + * \return the entered text + */ + +static gboolean killTimer( + GtkEntry *widget, + GdkEvent *event, + wString_p b) +{ + + // remove all timers related to this widget + while( g_source_remove_by_user_data( b )) + ; + b->timer = 0; + + if (b->action) { + const char *s; + + s = gtk_entry_get_text(GTK_ENTRY(b->widget)); + b->action(s, b->data); + } + gtk_editable_select_region( GTK_EDITABLE( widget ), 0, 0 ); + return( FALSE ); +} + +/** + * Timer handler for string activity. This timer expires if the user + * doesn't change an entry value within the preset time. + */ + +static gboolean +timeoutString( wString_p bs ) +{ + + if ( !bs ) + return( FALSE ); + if (bs->widget == 0) + abort(); + + if (bs->action) { + const char *s; + + s = gtk_entry_get_text(GTK_ENTRY(bs->widget)); + if ( s ) + bs->action(s, bs->data); + } + + bs->timer = 0; + return( FALSE ); +} + +/** + * Signal handler for 'activate' signal: callback with the current value and then + * select the whole default value + * + * \param widget IN the edit field + * \param b IN the widget data structure + * \return + */ + +static gboolean stringActivated( + GtkEntry *widget, + wString_p b) +{ + const char *s; + + if ( !b ) + return( FALSE ); + + s = wStringGetValue(b); + + if (b->valueP) + strcpy(b->valueP, s); + + if (b->action) { + b->action(s, b->data); + } + + // select the complete default value to make editing it easier + gtk_editable_select_region( GTK_EDITABLE( widget ), 0, -1 ); + return( FALSE ); +} + +/** + * Signal handler for changes in an entry field + * + * \param widget IN + * \param entry field IN + * \return + */ + +static void stringChanged( + GtkEntry *widget, + wString_p b) +{ + const char *new_value; + + if ( !b || b->busy ) + return; + + // get the entered value + new_value = wStringGetValue(b); + if (b->valueP != NULL) + strcpy(b->valueP, new_value); + + // + if (b->action){ + // if one exists, remove the inactivity timer + if( b->timer ) + g_source_remove( b->timer ); + + // create a new timer + b->timer = g_timeout_add( TIMEOUT_INACTIVITY, + (GSourceFunc)timeoutString, + b ); + + } + return; +} + +/** + * Create a single line entry field for a string value + * + * \param parent IN parent widget + * \param x IN x position + * \param y IN y position + * \param helpStr IN help anchor + * \param labelStr IN label + * \param option IN option (supported BO_READONLY ) + * \param width IN width of entry field + * \param valueP IN default value + * \param valueL IN maximum length of entry + * \param action IN application callback function + * \param data IN application data + * \return the created widget + */ + +wString_p wStringCreate( + wWin_p parent, + wPos_t x, + wPos_t y, + const char *helpStr, + const char *labelStr, + long option, + wPos_t width, + char *valueP, + wIndex_t valueL, + wStringCallBack_p action, + void *data) +{ + wString_p b; + + // create and initialize the widget + b = (wString_p)wlibAlloc(parent, B_TEXT, x, y, labelStr, sizeof *b, data); + b->valueP = valueP; + b->action = action; + b->option = option; + b->valueL = valueL; + b->timer = 0; + b->hasSignal = 0; + wlibComputePos((wControl_p)b); + + // create the gtk entry field and set maximum length if desired + b->widget = (GtkWidget *)gtk_entry_new(); + if (b->widget == NULL) abort(); + + if( valueL ) + gtk_entry_set_max_length( GTK_ENTRY( b->widget ), valueL ); + + // it is assumed that the parent is a fixed layout widget and the entry can + // be placed at a specific position + gtk_fixed_put(GTK_FIXED(parent->widget), b->widget, b->realX, b->realY); + + // set minimum size for widget + if (width) + gtk_widget_set_size_request(b->widget, width, -1); + + // get the resulting size + wlibControlGetSize((wControl_p)b); + + // if desired, place a label in front of the created widget + if (labelStr) + b->labelW = wlibAddLabel((wControl_p)b, labelStr); + + if (option & BO_READONLY) + gtk_editable_set_editable(GTK_EDITABLE(b->widget), FALSE); + + // set the default text and select it to make replacing it easier + if (b->valueP) { + wStringSetValue(b, b->valueP); + // select the text only if text is editable + } + + // show + gtk_widget_show(b->widget); + + // add the new widget to the list of created widgets + wlibAddButton((wControl_p)b); + + // link into help + wlibAddHelpString(b->widget, helpStr); + + g_signal_connect(GTK_OBJECT(b->widget), "changed", G_CALLBACK(stringChanged), b); + //g_signal_connect(GTK_OBJECT(b->widget), "activate", G_CALLBACK(stringActivated), b); + b->hasSignal = 1; + + // set the default text and select it to make replacing it easier + if (b->valueP) { + wStringSetValue(b, b->valueP); + // select the text only if text is editable + } + + gtk_widget_add_events( b->widget, GDK_FOCUS_CHANGE_MASK ); + g_signal_connect(GTK_OBJECT(b->widget), "focus-out-event", G_CALLBACK(killTimer), b); + + return b; +} -- cgit v1.2.3