File: gui_sketch_background.c

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/* File: gui_sketch_background.c; Copyright and License: see below */

#include "sketch/gui_sketch_background.h"
#include "meta/meta_info.h"
#include "u8/u8_trace.h"
#include <stdint.h>
#include "gui_gtk.h"
#include <assert.h>

void gui_sketch_background_init( gui_sketch_background_t *this_,
                                 gui_resources_t *resources,
                                 gui_sketch_texture_t *texture_downloader )
{
    U8_TRACE_BEGIN();
    assert( resources != NULL );
    assert( texture_downloader != NULL );

    shape_int_rectangle_init( &((*this_).bounds), 0, 0, 0, 0 );
    (*this_).resources = resources;
    (*this_).texture_downloader = texture_downloader;

    U8_TRACE_END();
}

void gui_sketch_background_destroy( gui_sketch_background_t *this_ )
{
    U8_TRACE_BEGIN();

    shape_int_rectangle_destroy( &((*this_).bounds) );
    (*this_).resources = NULL;
    (*this_).texture_downloader = NULL;

    U8_TRACE_END();
}

static const double BLACK_R = 0.0;
static const double BLACK_G = 0.0;
static const double BLACK_B = 0.0;
static const double BLACK_A = 1.0;
static const double DARK_R = 0.3;
static const double DARK_G = 0.3;
static const double DARK_B = 0.3;
static const double DARK_A = 1.0;
static const double D_GREY_R = 0.4;
static const double D_GREY_G = 0.4;
static const double D_GREY_B = 0.4;
static const double D_GREY_A = 1.0;
static const double GREY_R = 0.7;
static const double GREY_G = 0.7;
static const double GREY_B = 0.7;
static const double GREY_A = 1.0;
static const double ORANGE_R = 1.0;
static const double ORANGE_G = 0.8;
static const double ORANGE_B = 0.5;
static const double ORANGE_A = 1.0;
static const double LIGHT_R = 0.8;
static const double LIGHT_G = 0.8;
static const double LIGHT_B = 0.8;
static const double LIGHT_A = 1.0;
static const double BORDER = 8;  /* border between text/icons and ground rectangle */

void gui_sketch_background_draw_introduction( gui_sketch_background_t *this_,
                                              cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );

    const int32_t left = shape_int_rectangle_get_left( &((*this_).bounds) );
    const int32_t top = shape_int_rectangle_get_top( &((*this_).bounds) );
    const uint32_t width = shape_int_rectangle_get_width( &((*this_).bounds) );
    const uint32_t height = shape_int_rectangle_get_height( &((*this_).bounds) );

    int32_t text_area_start;

    /* if there is enough space, draw a nice picture bar on the left side */
    if ( width > 192 )
    {
        GdkPixbuf *bg_img = gui_resources_get_background_column( (*this_).resources );
        double icon_width = gdk_pixbuf_get_width ( bg_img );
        double icon_height = gdk_pixbuf_get_height ( bg_img );
        gdk_cairo_set_source_pixbuf( cr, bg_img, left, top );
        cairo_rectangle ( cr, left, top, icon_width, icon_height );
        cairo_fill (cr);

        text_area_start = left+icon_width;

        if ( height > icon_height )
        {
            cairo_set_source_rgba( cr, 0.0, 0.4, 0.3, 1.0 );
            cairo_rectangle ( cr, left, top+icon_height, icon_width, height-icon_height );
            cairo_fill (cr);
            cairo_move_to( cr, left, top+icon_height );
            cairo_line_to( cr, left+icon_width, top+icon_height );
            cairo_line_to( cr, left, top+icon_height-(0.3*icon_width) );
            cairo_fill (cr);
        }
    }
    else
    {
        text_area_start = left;
    }

    cairo_set_source_rgba( cr, GREY_R, GREY_G, GREY_B, GREY_A );
    cairo_rectangle ( cr, text_area_start, top, width-text_area_start, height );
    cairo_fill (cr);

    const int TAB_ROW0_Y = 48;
    const int TAB_ROW1_Y = 96;
    const int TAB_ROW2_Y = 192;
    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_crystal_facet_uml( (*this_).resources ),
                                                         "Welcome to",
                                                         META_INFO_PROGRAM_NAME_STR,
                                                         text_area_start+BORDER,
                                                         top+BORDER+TAB_ROW0_Y,
                                                         cr
                                                       );

    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_file_new( (*this_).resources ),
                                                         "To begin, please",
                                                         "create a new database file first.",
                                                         text_area_start+BORDER,
                                                         top+BORDER+TAB_ROW1_Y,
                                                         cr
                                                       );

    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_message_user_doc( (*this_).resources ),
                                                         "The user manual crystal-facet-uml_documentation.pdf is available",
#ifdef __linux__
                                                         "in the net and locally at /usr/share/doc/(packages/)crystal-facet-uml",
#else
                                                         "in the net",
#endif
                                                         text_area_start+BORDER,
                                                         top+BORDER+TAB_ROW2_Y,
                                                         cr
                                                       );

    U8_TRACE_END();
}

void gui_sketch_background_draw_navigation( gui_sketch_background_t *this_,
                                            unsigned int tree_depth,
                                            unsigned int num_children,
                                            cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );

    const int32_t left = shape_int_rectangle_get_left( &((*this_).bounds) );
    const int32_t top = shape_int_rectangle_get_top( &((*this_).bounds) );
    const uint32_t width = shape_int_rectangle_get_width( &((*this_).bounds) );
    const uint32_t height = shape_int_rectangle_get_height( &((*this_).bounds) );

    if ( 0 == tree_depth )
    {
        cairo_set_source_rgba( cr, LIGHT_R, LIGHT_G, LIGHT_B, LIGHT_A );
    }
    else
    {
        cairo_set_source_rgba( cr, D_GREY_R, D_GREY_G, D_GREY_B, D_GREY_A );
    }
    cairo_rectangle ( cr, left, top, width, height );
    cairo_fill (cr);

    if ( ( 0 == tree_depth )&&( 0 == num_children ))
    {
        /* this is a new, empty database */

        gui_sketch_background_private_draw_quick_introduction( this_, cr );
    }

    U8_TRACE_END();
}

void gui_sketch_background_draw_search( gui_sketch_background_t *this_, cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );

    const int32_t left = shape_int_rectangle_get_left( &((*this_).bounds) );
    const int32_t top = shape_int_rectangle_get_top( &((*this_).bounds) );
    const uint32_t width = shape_int_rectangle_get_width( &((*this_).bounds) );
    const uint32_t height = shape_int_rectangle_get_height( &((*this_).bounds) );

    cairo_set_source_rgba( cr, DARK_R, DARK_G, DARK_B, DARK_A );
    cairo_rectangle ( cr, left, top, width, height );
    cairo_fill (cr);

    U8_TRACE_END();
}

void gui_sketch_background_draw_edit( gui_sketch_background_t *this_, cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );

    const int32_t left = shape_int_rectangle_get_left( &((*this_).bounds) );
    const int32_t top = shape_int_rectangle_get_top( &((*this_).bounds) );
    const uint32_t width = shape_int_rectangle_get_width( &((*this_).bounds) );
    const uint32_t height = shape_int_rectangle_get_height( &((*this_).bounds) );

    cairo_set_source_rgba( cr, DARK_R, DARK_G, DARK_B, DARK_A );
    cairo_rectangle ( cr, left, top, width, height );
    cairo_fill (cr);

    U8_TRACE_END();
}

void gui_sketch_background_draw_create( gui_sketch_background_t *this_, cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );

    const int32_t left = shape_int_rectangle_get_left( &((*this_).bounds) );
    const int32_t top = shape_int_rectangle_get_top( &((*this_).bounds) );
    const uint32_t width = shape_int_rectangle_get_width( &((*this_).bounds) );
    const uint32_t height = shape_int_rectangle_get_height( &((*this_).bounds) );

    cairo_set_source_rgba( cr, ORANGE_R, ORANGE_G, ORANGE_B, ORANGE_A );
    cairo_rectangle ( cr, left, top, width, height );
    cairo_fill (cr);

    U8_TRACE_END();
}

void gui_sketch_background_private_draw_quick_introduction( gui_sketch_background_t *this_, cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );

    const int32_t left = shape_int_rectangle_get_left( &((*this_).bounds) );
    //const int32_t top = shape_int_rectangle_get_top( &((*this_).bounds) );
    //const uint32_t width = shape_int_rectangle_get_width( &((*this_).bounds) );
    const uint32_t height = shape_int_rectangle_get_height( &((*this_).bounds) );

    const int32_t TAB_HEIGHT = 144 + BORDER;
    const int32_t TAB_WIDTH = 640 + BORDER;
    const int32_t TAB_X = left + 16;
    const int32_t TAB_Y = height - TAB_HEIGHT - 16;
    const int32_t TAB_COL0_X = TAB_X + BORDER + 14;
    const int32_t TAB_COL1_X = TAB_X + BORDER + 112;
    const int32_t TAB_COL2_X = TAB_X + BORDER + 340;
    const int32_t TAB_ROW0_Y = TAB_Y + BORDER + 0;
    const int32_t TAB_ROW1_Y = TAB_Y + BORDER + 48;
    const int32_t TAB_ROW2_Y = TAB_Y + BORDER + 96;

    cairo_set_source_rgba( cr, GREY_R, GREY_G, GREY_B, GREY_A );
    cairo_rectangle ( cr, TAB_X, TAB_Y, TAB_WIDTH, TAB_HEIGHT );
    cairo_fill (cr);

    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_message_user_doc( (*this_).resources ),
                                                         "Quick",
                                                         "Intro:",
                                                         TAB_COL0_X,
                                                         TAB_ROW0_Y,
                                                         cr
                                                       );
    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_view_navigate( (*this_).resources ),
                                                         "Click on a diagram to navigate,",
                                                         "on '+' to create a new diagram.",
                                                         TAB_COL1_X,
                                                         TAB_ROW0_Y,
                                                         cr
                                                       );
    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_view_edit( (*this_).resources ),
                                                         "Click on an element to edit",
                                                         "name, type and description.",
                                                         TAB_COL1_X,
                                                         TAB_ROW1_Y,
                                                         cr
                                                       );
    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_view_edit( (*this_).resources ),
                                                         "Drag an element to change",
                                                         "its position.",
                                                         TAB_COL2_X,
                                                         TAB_ROW1_Y,
                                                         cr
                                                       );
    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_view_create( (*this_).resources ),
                                                         "Click to create items.",
                                                         "Drag to create arrows.",
                                                         TAB_COL1_X,
                                                         TAB_ROW2_Y,
                                                         cr
                                                       );
    gui_sketch_background_private_draw_icon_and_message( this_,
                                                         gui_resources_get_file_export( (*this_).resources ),
                                                         "Select the output folder",
                                                         "to export all diagrams.",
                                                         TAB_COL2_X,
                                                         TAB_ROW2_Y,
                                                         cr
                                                       );

    U8_TRACE_END();
}

void gui_sketch_background_private_draw_icon_and_message( gui_sketch_background_t *this_,
                                                          GdkTexture *icon_1,
                                                          const char *text_1,
                                                          const char *text_2,
                                                          int x,
                                                          int y,
                                                          cairo_t *cr )
{
    U8_TRACE_BEGIN();
    assert( NULL != cr );
    assert( NULL != icon_1 );
    assert( NULL != text_1 );
    assert( NULL != text_2 );

    const double icon_width = gdk_texture_get_width ( icon_1 );
    gui_sketch_texture_draw( (*this_).texture_downloader, icon_1, x, y, cr );

    cairo_set_source_rgba( cr, BLACK_R, BLACK_G, BLACK_B, BLACK_A );
    cairo_set_font_size ( cr, 12.0 );
    cairo_move_to ( cr, x+icon_width+BORDER, y + 14 );
    cairo_show_text ( cr, text_1 );
    cairo_move_to ( cr, x+icon_width+BORDER, y + 2*14 );
    cairo_show_text ( cr, text_2 );

    U8_TRACE_END();
}


/*
Copyright 2017-2025 Andreas Warnke

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/