slider widget, tons of fixes and improvements for win32, reworked font loading.
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18 changed files with 452 additions and 90 deletions
201
src/gui/widgets/slider.c
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201
src/gui/widgets/slider.c
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#include <pgpl.h>
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#include <stdlib.h>
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static void get_slider_size(PGPL_GuiSliderWidget *slider_widget,
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double *slider_x, double *slider_y, double x,
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double y, double max_width, double max_height) {
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double offset;
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if (slider_widget->inversed) {
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offset = 1.0 - slider_widget->current_value;
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} else {
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offset = slider_widget->current_value;
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}
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if (slider_widget->vertical) {
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*slider_x = x - slider_widget->bar_height / 2.0;
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*slider_y = y + offset * (max_height - slider_widget->bar_height) -
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slider_widget->bar_height / 2.0;
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} else {
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*slider_x = x + offset * (max_width - slider_widget->bar_height) -
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slider_widget->bar_height / 2.0;
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*slider_y = y - slider_widget->bar_height / 2.0;
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}
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}
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static void get_content_size(PGPL_GuiWidget *widget, PGPL_GuiTheme *theme,
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double *width, double *height, double max_width,
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double max_height) {
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PGPL_GuiSliderWidget *slider_widget = (PGPL_GuiSliderWidget *)widget;
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(void)theme;
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if (slider_widget->vertical) {
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*width = slider_widget->bar_height;
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*height = max_height;
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} else {
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*width = max_width;
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*height = slider_widget->bar_height;
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}
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}
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static void render_content(PGPL_GuiWidget *widget, PGPL_Renderer *renderer,
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PGPL_GuiTheme *theme, double x, double y,
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double max_width, double max_height) {
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PGPL_GuiSliderWidget *slider_widget = (PGPL_GuiSliderWidget *)widget;
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double slider_x;
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double slider_y;
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double completion_x;
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double completion_y;
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double completion_width;
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double completion_height;
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get_slider_size(slider_widget, &slider_x, &slider_y, x, y, max_width,
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max_height);
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if (slider_widget->vertical) {
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max_width = slider_widget->bar_height;
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} else {
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max_height = slider_widget->bar_height;
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}
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pgpl_render_rectangle(renderer, theme->text_color[widget->gui_color], x, y,
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max_width, max_height);
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pgpl_render_rectangle(renderer, theme->background_color,
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x + slider_widget->bar_height / 4.0,
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y + slider_widget->bar_height / 4.0,
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max_width - slider_widget->bar_height / 2.0,
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max_height - slider_widget->bar_height / 2.0);
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max_width -= slider_widget->bar_height / 2.0;
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max_height -= slider_widget->bar_height / 2.0;
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if (slider_widget->inversed) {
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if (slider_widget->vertical) {
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completion_x = x + slider_widget->bar_height / 4.0;
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completion_y = y + slider_widget->bar_height / 4.0 +
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max_height * (1.0 - slider_widget->current_value);
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completion_width = max_width;
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completion_height = max_height * slider_widget->current_value;
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} else {
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completion_x = x + slider_widget->bar_height / 4.0 +
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max_width * (1.0 - slider_widget->current_value);
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completion_y = y + slider_widget->bar_height / 4.0;
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completion_width = max_width * slider_widget->current_value;
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completion_height = max_height;
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}
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} else {
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completion_x = x + slider_widget->bar_height / 4.0;
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completion_y = y + slider_widget->bar_height / 4.0;
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if (slider_widget->vertical) {
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completion_width = max_width;
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completion_height = max_height * slider_widget->current_value;
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} else {
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completion_width = max_width * slider_widget->current_value;
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completion_height = max_height;
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}
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}
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pgpl_render_rectangle(
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renderer, theme->widget_background_color[widget->gui_color], completion_x,
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completion_y, completion_width, completion_height);
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pgpl_render_circle(renderer, theme->text_color[widget->gui_color], slider_x,
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slider_y, slider_widget->bar_height, 32);
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}
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static void event(PGPL_GuiWidget *widget, PGPL_GuiTheme *theme, PGPL_Gui *gui,
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PGPL_WindowEventType event_type,
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PGPL_WindowEventData *event_data, double x, double y,
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double max_width, double max_height) {
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if (event_type == PGPL_WINDOW_EVENT_MOUSE_PRESS ||
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event_type == PGPL_WINDOW_EVENT_MOUSE_RELEASE ||
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event_type == PGPL_WINDOW_EVENT_MOUSE_MOVE) {
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PGPL_GuiSliderWidget *slider_widget = (PGPL_GuiSliderWidget *)widget;
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double slider_x;
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double slider_y;
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pgpl_gui_widget_adjust_event_params(widget, theme, &x, &y, &max_width,
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&max_height);
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get_slider_size(slider_widget, &slider_x, &slider_y, x, y, max_width,
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max_height);
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if (event_type == PGPL_WINDOW_EVENT_MOUSE_PRESS) {
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if (pgpl_gui_widget_within_area(event_data->input_event.x,
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event_data->input_event.y, slider_x,
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slider_y, slider_widget->bar_height * 2,
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slider_widget->bar_height * 2)) {
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slider_widget->sliding = true;
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if (slider_widget->vertical) {
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slider_widget->last_pos = event_data->input_event.y;
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} else {
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slider_widget->last_pos = event_data->input_event.x;
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}
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}
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} else if (event_type == PGPL_WINDOW_EVENT_MOUSE_RELEASE) {
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slider_widget->sliding = false;
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} else if (slider_widget->sliding) {
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double new_pos;
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double axis_length;
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if (slider_widget->vertical) {
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new_pos = event_data->input_event.y;
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axis_length = max_height;
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} else {
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new_pos = event_data->input_event.x;
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axis_length = max_width;
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}
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axis_length -= slider_widget->bar_height;
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if (slider_widget->inversed) {
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slider_widget->current_value -=
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(new_pos - slider_widget->last_pos) / axis_length;
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} else {
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slider_widget->current_value +=
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(new_pos - slider_widget->last_pos) / axis_length;
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}
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if (slider_widget->current_value > 1.0) {
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slider_widget->current_value = 1.0;
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} else if (slider_widget->current_value < 0.0) {
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slider_widget->current_value = 0.0;
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}
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slider_widget->slide_callback(gui->app_data,
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slider_widget->current_value);
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slider_widget->last_pos = new_pos;
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}
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}
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}
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static void destroy(PGPL_GuiWidget *widget) {
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pgpl_gui_slider_widget_destroy((PGPL_GuiSliderWidget *)widget);
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}
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PGPL_GuiSliderWidget *pgpl_gui_slider_widget_create(
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uint32_t bar_height, bool inversed, bool vertical, double value,
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void (*slide_callback)(void *app_data, double value)) {
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PGPL_GuiSliderWidget *slider_widget = calloc(1, sizeof(*slider_widget));
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slider_widget->parent.id = "PGPL_GuiSliderWidget";
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slider_widget->parent.get_content_size = get_content_size;
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slider_widget->parent.render_content = render_content;
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slider_widget->parent.event = event;
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slider_widget->parent.destroy = destroy;
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slider_widget->bar_height = bar_height;
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slider_widget->inversed = inversed;
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slider_widget->vertical = vertical;
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slider_widget->current_value = value;
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slider_widget->slide_callback = slide_callback;
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return slider_widget;
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}
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void pgpl_gui_slider_widget_destroy(PGPL_GuiSliderWidget *slider_widget) {
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free(slider_widget);
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}
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